作者： Gong, Xiaomin*;Huang, Danlian*;Liu, Yunguo;Zou, Dongsheng;Hu, Xi;...

期刊： Ecotoxicology and Environmental Safety,2021年208:111510 ISSN：0147-6513

通讯作者： Gong, Xiaomin;Huang, Danlian

作者机构： [Xiao, Zhihua; Wu, Zhibin; Gong, Xiaomin; Zou, Dongsheng; Yang, Yang] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Xiao, Zhihua; Wu, Zhibin; Gong, Xiaomin; Zou, Dongsheng; Yang, Yang] Key Lab Rural Ecosyst Hlth Dongting Lake Area Hun, Changsha 410128, Peoples R China.;[Huang, Danlian; Liu, Yunguo] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China.;[Hu, Xi] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.;[Zhou, Lu] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Peoples R China.

通讯机构： [Gong, Xiaomin; Huang, Danlian] H;Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China.

关键词： Plant growth;Cadmium accumulation;Cd fractions;Sediments properties;Bacterial community

摘要： Environment functional materials have been widely used, but whether their effects on the contaminated environment could facilitate phytoremediation is not yet well understood. In this study, starch stabilized nanoscale zerovalent iron (SN), multiwall carbon nanotubes (MW) and tea waste derived biochar (TB) were used to facilitate the phytoremediation of cadmium (Cd) contaminated sediments by Boehmeria nivea (L.) Gaudich. Results showed that 100 mg/kg SN, 500 mg/kg MW and 500 mg/kg TB facilitated phytoremediation, as evidenced by increasing Cd accumulation and/or promoting plant growth. These concentrations of materials increased the reducible fraction of Cd by 9–10% and decreased the oxidizable proportion of Cd by 48–52%, indicating the improvement of Cd bioavailability through converting the oxidizable Cd into reducible form. The activities of urease, phosphatase and catalase, which related to nutrient utilization and oxidative stress alleviation, increased by 20–24%, 25–26%, and 8–9% in the sediments treated with 500 mg/kg MW and 500 mg/kg TB, respectively. In addition, the 16S rRNA gene sequence results showed that these concentrations of materials changed the bacterial diversity. The abundance of Acidobacteria, Actinobacteria, Nitrospirae and Firmicutes were increased by some of the applied materials, which could promote plant growth, change Cd bioavailability and reduce Cd toxicity. These findings indicated that the applied environment functional materials could facilitate the phytoremediation of Cd contaminated environment by changing Cd fractions, sediments properties and bacterial community structure. © 2020 The Authors

语种： 英文

作者： Hu, Xi*;Hu, Xinjiang*;Peng, Qingqing;Zhou, Lu;Tan, Xiaofei;...

期刊： Chemical Engineering Journal,2020年380:122366 ISSN：1385-8947

通讯作者： Hu, Xi;Hu, Xinjiang

作者机构： [Hu, Xi; Tang, Chunfang; Hu, Xinjiang; Wang, Hui; Hu, X; Hu, XJ; Ning, Ziqi] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Peng, Qingqing] Environm Monitoring Ctr Hunan Prov, Changsha 410004, Hunan, Peoples R China.;[Zhou, Lu] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China.;[Tan, Xiaofei] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Jiang, Luhua] Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410004, Hunan, Peoples R China.

通讯机构： [Hu, X; Hu, XJ] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.

关键词： Ciprofloxacin;Heterogeneous TiO2;Intermediates;Photocatalytic degradation;Toxicological assessment

摘要： The presence of antibiotics in different water sources is a ubiquitous, global concern. The persistence of trace amounts of antibiotics can lead to antibiotic resistance of microbial pathogens and jeopardize the health of ecosystems. One possible solution is the photocatalytic degradation of antibiotics from water systems by titanium dioxide (TiO2) photocatalysis. In recent years, heterogeneous TiO2 has been examined for the photocatalytic degradation of ciprofloxacin (CIP) under UV/visible light irradiation. This review offers an overview of the recent advances in visible light-activated TiO2 for the photocatalytic degradation of CIP and the factors impacting the photocatalytic behavior. In particular, we focused on the structural elucidation of reaction intermediates, and we aimed to determine research gaps in the utilization of visible light-activated TiO2 for water treatment. Future research directions, including the ecotoxicological effect of the photocatalytic degradation intermediates, the thermodynamical and kinetic mechanisms of the photocatalytic degradation process, and future applications of heterogeneous TiO2 photocatalysts, are also proposed. © 2019 Elsevier B.V.

语种： 英文

作者： Zhou, Daixi;Xie, Guangyu;Hu, Xinjiang*;Cai, Xiaoxi;Zhao, Yunlin;...

期刊： International Journal of Environmental Research and Public Health,2020年17(3):788 ISSN：1661-7827

通讯作者： Hu, Xinjiang

作者机构： [Tang, Chunfang; Hu, Xinjiang; Wang, Hui; Xie, Guangyu; Fu, Xiaohua; Hu, Xi; Lai, Kaiqi; Hu, XJ; Hu, X; Zhou, Daixi; Liang, Chong] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.;[Cai, Xiaoxi] Hunan First Normal Univ, Coll Art & Design, Changsha 410205, Peoples R China.;[Jin, Qi; Zhao, Yunlin] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Peoples R China.;[Tan, Xiaofei] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China.

通讯机构： [Hu, XJ; Hu, X] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.

关键词： adsorbent;biochar;bismuth;bismuth ferrite;calcium ion;carbon;chitosan;chlorine;chromium;nitrate;sulfate;unclassified drug;biochar;charcoal;chromium hexavalent ion;ion;adsorption;aldehyde;biochar;bismuth;chitin;chromium;ferrite;ion;performance assessment;separation;adsorption;adsorption kinetics;Article;chemical analysis;concentration (parameter);contact time;cross linking;diffusion;heavy metal removal;physical chemistry;reaction analysis;separation technique;temperature;waste water management;adsorption;ecosystem;Hibiscus;kinetics;magnetism;pH;water management;water pollutant;Hibiscus cannabinus;Adsorption;Charcoal;Chitosan;Chromium;Ecosystem;Hibiscus;Hydrogen-Ion Concentration;Ions;Kinetics;Magnetic Phenomena;Water Pollutants, Chemical;Water Purification

摘要： Cr(VI) contamination has posed great threat to both the ecosystem and human health for its carcinogenic and mutagenic nature. A highly effective adsorbent for the removal of Cr(VI) was prepared and its adsorption mechanism was thoroughly discussed in this study. In detail, magnetic BiFeO3 and kenaf biochar were loaded on cross-linked chitosan to obtain chitosan-kenaf biochar@BiFeO3 (CKB) for improving adsorption capacity towards Cr(VI). The adsorption process of Cr(VI) onto CKB was evaluated as a function of the pH, the existence of competing ions, the initial concentration of Cr(VI) and contact time. The results show that CKB exhibits the highest adsorption capacity under the optimal pH 2.0. The presence of competing ions such as Ca2+, NO3-, SO42-, and Cl- decreases the adsorption capacity; among them, Ca2+ and NO3- show the greatest hindrance. By studying the effect of initial Cr(VI) concentration on the adsorption capacity, it was found that CKB in the solution was enough to remove Cr(VI) for all treatments (10−200 mg/L). The adsorption experimental data were well fitted with pseudo-first-order model, suggesting that chemisorption is not the dominant rate-limiting step. Freundlich isotherm model can better explain the adsorption process, indicating a non-ideal adsorption towards Cr(VI) on a heterogeneous surface of CKB. A 25-1 Fractional Factorial Design (FFD) showed that pH and initial concentration of Cr(VI) have significant influence on Cr(VI) adsorption in our reaction system. In general, excellent adsorption efficiency of CKB indicates that it may be a good candidate for the remediation of Cr(VI)-contaminating wastewater. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

语种： 英文

作者： 胡熙

期刊： 魅力中国,2020年(21):9-10 ISSN：1673-0992

作者机构： 中南林业科技大学环境科学与工程学院,湖南 长沙 410004;[胡熙] 中南林业科技大学

关键词： 生态治理;科学技术;检测分析

摘要： 生态修复是确保生态环境可持续发展的重要措施.本文以生态修复方案为主要研究对象,基于多学科交叉等相关技术应用,开展对于生态环境的修复操作,针对当前生态方案的制定内容中,存在的相关问题,开展具有科学实践价值的技术研究,结合笔者多年生态修复领域的从业经验,提出具有一定借鉴意义的策略和建议,为从事生态修复等行业领域的科研人员,提供力所能及的帮助和支持.

语种： 中文

作者： 尹亚欧;李科林;胡熙;王艳;左舒琴

期刊： 矿业研究与开发,2020年40(4):122-129 ISSN：1005-2763

作者机构： 中南林业科技大学环境科学与工程学院, 湖南长沙410004;[王艳; 尹亚欧; 左舒琴; 李科林; 胡熙] 中南林业科技大学

关键词： 铁改性蛭石;腐殖酸;响应面法;吸附热力学;吸附动力学

摘要： 采用响应面法研究了铁改性蛭石-腐殖酸复合吸附剂去除As(Ⅲ)的影响因素(吸附时间、吸附剂量、pH、腐殖酸含量在吸附剂中的占比、As(Ⅲ)初始浓度),得到了影响因素对去除率的二次多项式模型和最佳吸附条件,并对吸附行为的吸附动力学与热力学进行了探讨.结果 表明,5个因素均对复合吸附剂吸附As(Ⅲ)的行为有显著影响;吸附最佳条件是:时间235min,吸附剂剂量8.48 g·L-1,pH6.4,腐殖酸占比20％,As(Ⅲ)初始浓度11 mg·L-1,此条件下的最大去除率为96.06％;用Langmuir、Freundlich方程拟合表明,Langmuir拟合结果最好,最大吸附量为3.94 mg·g-1(313 K);吸附动力学研究结果表明,该吸附过程符合准二级动力学模型;对吸附过程热力学函数△G、△H、△S的计算表明,吸附过程是自发的吸热过程,吸附过程增加了体系的混乱度.

语种： 中文

作者： Wang, Ying;Mamat, Xamxikamar*;Li, Yongtao*;Hu, Xun;Wang, Ping;...

期刊： Electroanalysis,2019年31(7):1390-1400 ISSN：1040-0397

通讯作者： Mamat, Xamxikamar;Li, Yongtao;Hu, Guangzhi

作者机构： [Li, Yongtao; Mamat, Xamxikamar; Mamat, X; Hu, Guangzhi; Wang, Ying] Chinese Acad Sci, Key Lab Chem Plant Resources Arid Reg, State Key Lab Basis Xinjiang Indigenous Med Plant, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China.;[Hu, Xun] Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Shandong, Peoples R China.;[Hu, Guangzhi; Wang, Ping] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Dong, Yemin] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China.;[Wang, Ying] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.

通讯机构： [Mamat, X; Li, YT; Hu, GZ; Hu, Guangzhi] C;Chinese Acad Sci, Key Lab Chem Plant Resources Arid Reg, State Key Lab Basis Xinjiang Indigenous Med Plant, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China.;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.

关键词： Electrochemical sensor;MoS2@MWCNTs;aristolochic acids;linear sweeping voltammetry

摘要： <jats:title>Abstract</jats:title><jats:p>In this study, a molybdenum disulfide/multiwalled carbon nanotubes (MoS<jats:sub>2</jats:sub>@MWCNTs) nanocomposite was synthesized by employing a simple hydrothermal method. The flower‐like structure of the MoS<jats:sub>2</jats:sub>@MWCNTs was characterized via scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and the load of crystalline MoS<jats:sub>2</jats:sub> was verified via X‐ray diffraction (XRD) and energy‐dispersive spectroscopy (EDS). The as‐prepared MoS<jats:sub>2</jats:sub>@MWCNTs nanocomposite was used to modify glassy carbon electrode (GCE) as an electrochemical sensor for detecting aristolochic acids (AAs). With the optimized parameters, the proposed electrochemical sensor exhibited good sensitivity and a broad linear concentration range for detecting AAs from 0.2 to 10 <jats:styled-content>μ</jats:styled-content>mol/L and 10 to 100 <jats:styled-content>μ</jats:styled-content>mol/L, with the sensitivity of −3.10 <jats:styled-content>μ</jats:styled-content>A/(<jats:styled-content>μ</jats:styled-content>mol/L) and −0.91 <jats:styled-content>μ</jats:styled-content>A/(<jats:styled-content>μ</jats:styled-content>mol/L), respectively. The detection limit was also calculated as 0.06 <jats:styled-content>μ</jats:styled-content>mol/L (S/N=3) based on the low background signal. Furthermore, the modified electrochemical sensor exhibited good selectivity, repeatability, reproducibility, and stability, thus showing potential application for detecting AA in chinese herbs with good mean recovery and accuracy. In other words, the MoS<jats:sub>2</jats:sub>@MWCNTs/GCE can be used as an excellent platform to detect AAs.</jats:p>

语种： 英文

作者： Zhang, Peng;Tan, Xiaofei*;Liu, Shaobo*;Liu, Yunguo;Zeng, Guangming;...

期刊： Chemical Engineering Journal,2019年378:122141 ISSN：1385-8947

通讯作者： Tan, Xiaofei;Liu, Shaobo

作者机构： [Yin, Zhihong; Zhang, Peng; Liu, Yunguo; Zeng, Guangming; Tan, Xiaofei; Tan, XF; Liu, Shaobo; Ye, Shujing; Liu, Ni] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Yin, Zhihong; Zhang, Peng; Liu, Yunguo; Zeng, Guangming; Tan, Xiaofei; Ye, Shujing; Liu, Ni] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Liu, Shaobo] Cent South Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.;[Liu, Shaobo] Cent South Univ, Sch Architecture & Art, Changsha 410083, Hunan, Peoples R China.;[Hu, Xinjiang] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha, Hunan, Peoples R China.

通讯机构： [Tan, XF; Liu, SB] H;Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.

关键词： Advanced oxidation processes;Degradation;Estrogen;Iron-doped graphitic biochar;Persulfate;Water treatment

摘要： Advanced oxidation processes (AOPs) based on sulfate radicals (SO4∙-) is being actively investigated as an effective technology for aqueous organic pollutants degradation. In this work, a novel iron-doped graphitic biochar (Fe@GBC), which was synthesized by one-step method using biomass-derived biochar as precursor and potassium ferrate (K2FeO4) as activator, was applied to activate persulfate (PS) for the degradation of 17β-estradiol (E2). The characterizations indicated that Fe@GBC was successfully doped with iron particles and possessed a porous graphitic carbon structure. In order to evaluate the applicability of Fe@GBC, the effects of various reaction parameters, such as initial pH, catalyst dosage, PS concentration, as well as the reusability and stability of Fe@GBC were systematically investigated. With the synergistic effect of doped iron particles and porous graphitic carbon structure, Fe@GBC exhibited a high activity for PS activation and great degradation capacity to E2 (almost 100% degradation efficiency within 90 min). Through radical quenching experiments and electron spin resonance (ESR) analysis, it found that both SO4∙- and OH∙ were responsible for the degradation of E2, while SO4∙- played a dominant role. Moreover, Fe@GBC/PS also exhibited good degradation performance in complex water matrices. Overall, the facile one-step synthetic strategy and superior performance make Fe@GBC an alternative catalyst for persulfate activation and aqueous pollutants degradation. © 2019 Elsevier B.V.

语种： 英文

作者： 刘少恒;陶建军;周诗彪;杨基峰;胡熙

期刊： 微生物学杂志,2019年39(5):125-128 ISSN：1005-7021

作者机构： 湖南文理学院化学与材料工程学院, 湖南, 常德, 415000;中南林业科技大学环境科学与工程学院, 湖南, 长沙, 410004;[陶建军; 刘少恒; 杨基峰; 周诗彪] 湖南文理学院;[胡熙] 中南林业科技大学

关键词： 环境科学与工程;环境工程微生物;课程改革;对策

摘要： 《环境工程微生物学》是环境工程专业的核心课程之一,为提高教学质量,以湖南文理学院环境工程专业为例,从明确课程定位、提升教师教学水平、提高学生兴趣以及加强实践教学几个方面进行了探讨。首先需明确该课程不同于普通的微生物学,教师在授课中应将微生物学相关理论知识与环境科学、环境工程领域实践相结合。其次,教师应通过多种方式提高自身教学水平。在授课中应注意通过合理使用教具、引入热点问题以及善于使用多媒体设备、提高学生课堂参与力度等方式来培养学生的学习兴趣。同时,在实践教学中也应注意促进学生对于环境工程微生物理论知识的理解和运用,提高动手能力和实验独操能力,以期达到更好的教学效果。

语种： 中文

作者： Hu, Xinjiang;Wang, Weixuan;Xie, Guangyu;Wang, Hui*;Tan, Xiaofei;...

期刊： Chemosphere,2019年216(Feb.):733-741 ISSN：0045-6535

通讯作者： Wang, Hui;Zhao, Yunlin

作者机构： [Hu, Xinjiang; Zhao, Yunlin; Wang, Hui; Wang, Weixuan; Jin, Qi; Xie, Guangyu; Zhou, Daixi] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Hu, Xinjiang; Zhao, Yunlin; Wang, Hui] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;[Wang, Hui] Chinese Acad Agr Sci, Inst Bast Fiber Crops, Changsha 410205, Hunan, Peoples R China.;[Tan, Xiaofei] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Tan, Xiaofei] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.

通讯机构： [Wang, Hui; Zhao, Yunlin] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.

关键词： g-C3N4 nanosheets;BiFeO3;Cr(VI) photoreduction;Heterojunction;Electrolyte ion

摘要： A novel ternary composite of graphitic carbon nitride (g-C3N4)/graphene oxide (GO) sheets/BiFeO3 (CNGB) with highly enhanced visible-light photocatalytic activity toward Cr(Vl) photoreduction is prepared and characterized. The characterization and photocatalysis experiments corroborate its reasonable band gap, efficient charge separation and transfer, widened visible-light adsorption, easy solid-liquid separation, good stability and superior catalytic activity of CNGB. Three CNGB samples with different ratios of g-C3N4 and BiFeO3 (CNGB-1, -2, -3 with 2:4, 3:3, and 4:2, respectively), though possessing different adsorption ability, eventually remove all Cr(Vl) ions via photocatalysis within 90 min. The catalytic efficiency of the composite is the highest at pH 2; increases in pH decrease the catalytic ability. The inorganic anions such as SO4-, Cl-, and NO3- only slightly affects the photocatalytic process. The matching of the band structure between BiFeO3 and g-C3N4 generates efficient photogenerated electron migration from the conduction band of g-C3N4 to that of BiFeO3, which is also facilitated by the electron bridging and collecting effects of GO, and holes transfer from the valence band of BiFeO3 to that of g-C3N4, yielding the efficient separation of photogenerated electron-hole pairs and the subsequent enhancement of photocatalytic activity. The research provides a theoretical basis and technical support for the development of photocatalytic technologies for effective application in wastewater treatment and Cr-contaminated water restoration. (C) 2018 Elsevier Ltd. All rights reserved.

语种： 英文

作者： Yalikun, Nuerbiya;Mamat, Xamxikamar*;Li, Yongtao*;Hu, Xun;Wang, Ping;...

期刊： Microchimica Acta,2019年186(6):379 ISSN：0026-3672

通讯作者： Mamat, Xamxikamar;Li, Yongtao;Hu, Guangzhi

作者机构： [Li, Yongtao; Yalikun, Nuerbiya; Mamat, Xamxikamar; Mamat, X; Hu, Guangzhi] Chinese Acad Sci, Key Lab Chem Plant Resources Arid Reg, State Key Lab Basis Xinjiang Indigenous Med Plant, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China.;[Yalikun, Nuerbiya] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.;[Hu, Xun] Jinan Univ, Sch Mat Sci & Engn, Jinan 250022, Shandong, Peoples R China.;[Hu, Guangzhi; Wang, Ping] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.

通讯机构： [Mamat, X; Li, YT; Hu, GZ; Hu, Guangzhi] C;Chinese Acad Sci, Key Lab Chem Plant Resources Arid Reg, State Key Lab Basis Xinjiang Indigenous Med Plant, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China.;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.

关键词： Cyclic voltammetry;Differential pulse voltammetry;Electrochemistry;Nanocluster;Sensor;Electrochemical response;Electro catalytic oxidation;Flavonoids

摘要： The authors describe a method for synthesis of a nanomaterial consisting of porous carbon encapsulated Mg-Al-Si alloy (denoted as Mg-Al-Si@PC) nanocluster. The nanocluster was synthesis by a solvothermal reaction, followed by high-temperature annealing. The nanoclusters were used as a novel immobilization platform for electrochemical sensing of rutin. The electrochemical behavior of rutin at a modified electrode was investigated by cyclic voltammetry and differential pulse voltammetry. The modified electrode demonstrates a high electrocatalytic activity toward rutin oxidation at a relatively low working potential (0.6 vs. Ag/AgCl). Under optimal conditions, the sensor has a linear response in the 1–10μM rutin concentration range, and a 0.01μM lower detection limit (at an S/N ratio of 3). It was successfully applied to the quantification of rutin in pharmaceutical tablets, and satisfactory results were obtained. Furthermore, the results correspond with those with the standard method and with the amounts indicated by the producer, respectively. [Figure not available: see fulltext.] © 2019, Springer-Verlag GmbH Austria, part of Springer Nature.

语种： 英文

作者： Liu, Shaobo;Li, Meifang*;Liu, Yunguo*;Liu, Ni;Tan, Xiaofei;...

期刊： Journal of the Taiwan Institute of Chemical Engineers,2019年102:330-339 ISSN：1876-1070

通讯作者： Li, Meifang;Liu, Yunguo

作者机构： [Liu, Shaobo] Cent S Univ, Sch Architecture & Art, Lushan South Rd, Changsha 410083, Hunan, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Met & Environm, Lushan South Rd, Changsha 410083, Hunan, Peoples R China.;[Yin, Zhihong; Liu, Yunguo; Tan, Xiaofei; Li, Meifang; Liu, Ni] Hunan Univ, Coll Environm Sci & Engn, Lushan South Rd, Changsha 410082, Hunan, Peoples R China.;[Yin, Zhihong; Liu, Yunguo; Tan, Xiaofei; Li, Meifang; Liu, Ni] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Lushan South Rd, Changsha 410082, Hunan, Peoples R China.;[Jiang, Luhua] Cent S Univ, Sch Minerals Proc & Bioengn, Lushan South Rd, Changsha 410083, Hunan, Peoples R China.

通讯机构： [Li, MF; Liu, YG] H;Hunan Univ, Coll Environm Sci & Engn, Lushan South Rd, Changsha 410082, Hunan, Peoples R China.;Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Lushan South Rd, Changsha 410082, Hunan, Peoples R China.

关键词： Bond strength (chemical);Carbonization;Chemical activation;Graphene;Graphene oxide;Hydrogen bonds;Ionic strength;Magnetite;Magnetite nanoparticles;Mechanisms;Nanomagnetics;Organic acids;Thermoanalysis;Water pollution;Adsorption capacities;Bio chars;Carbonization methods;Initial concentration;Oxygen-containing functional groups;Pseudo second order kinetics;Thermo dynamic analysis;Zeta potential measurements;Adsorption

摘要： A novel graphene oxide supported activated magnetic biochar (GO-AMBC) is fabricated for 17 beta-estradiol (E2) removal from aqueous solution by grafting graphene oxide (GO) and magnetite nanoparticles onto the activated biochar surface with a one-step activation, magnetization, and carbonization method. GO-AMBC is characterized using SEM, TEM, FTIR, VSM, XRD, XPS, BET surface area and zeta potential measurements. The characterization results show that GO-AMBC possesses a larger surface area and more oxygen-containing functional groups than the unmodified biochar. When the E2 initial concentration is 6 mg/L, its adsorption capacity by GO-AMBC (46.22 mg/g) is more than two times higher than that of pristine biochar (23.09 mg/g) at 298 K and pH = 7.0. Adsorption results show that E2 uptake follows by pseudo-second-order kinetic and Freundlich isothermal models. Thermodynamic analysis indicates that the adsorption process is spontaneous and exothermic. E2 removal by GO-AMBC is significantly affected by the actual water conditions, including solution pH, ionic strength, and organic acids. Among them, organic acids have obvious inhibition effect on E2 removal, and the inhibition effect by oxalate is stronger than that of benzoate. The adsorption mechanism of E2 on GO-AMBC is mainly controlled by hydrogen bonds, electrostatic and pi-pi interactions. The experimental results of this study and comparative analysis with other adsorbents suggest that GO-AMBC is an economical, efficient and recyclable adsorbent and has great potential for E2 removal from contaminated water. (C) 2019 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

语种： 英文

作者： Qiu, Guoqiang;Zhao, Yunlin*;Wang, Hui;Tan, Xiaofei;Chen, Fangxu;...

期刊： Environmental Science and Pollution Research,2019年26(7):6565-6575 ISSN：0944-1344

通讯作者： Zhao, Yunlin;Hu, Xinjiang

作者机构： [Zhao, Yunlin; Hu, Xinjiang; Qiu, Guoqiang; Zhao, YL] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;[Chen, Fangxu; Zhao, Yunlin; Hu, Xinjiang; Wang, Hui; Zhao, YL] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Wang, Hui] Chinese Acad Agr Sci, Inst Bast Fiber Crops, Changsha 410205, Hunan, Peoples R China.;[Tan, Xiaofei] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Tan, Xiaofei] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.

通讯机构： [Zhao, YL; Hu, XJ] C;Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.

关键词： Biochar;Phosphate adsorption;Eutrophication;Recycling;Restored manganese mine land

摘要： In this study, Broussonetia papyrifera leaves collected from land near a restored manganese mine in the Hunan Province of China were converted into biochar under high-temperature anaerobic conditions, regeneration and utilization of agricultural and forest waste, and applied to the prevention of eutrophication. The physicochemical properties of the B. papyrifera biochar were characterized using Micromeritics 3Flex analyzer, scanning electron microscope (SEM), Fourier transform infrared spectrometer (FT-IR), thermogravimetric analyzer (TGA), X-ray photoelectron spectrometer (XPS), zeta potential meter (zeta), and X-ray diffraction (XRD). The effects of pH, ionic strength, coexisting ions, time, initial concentration, and temperature on the decontamination process of phosphate in water were studied. The results indicated that adsorption was enhanced under alkaline conditions. The pseudo-second-order model of adsorption kinetics was applied to illustrate the adsorption processes. The chemical adsorption reaction was the main rate-limiting step in the adsorption process. Isotherm experimental data were best fitted by the Freundlich model at 25°C and by the Langmuir model at 35°C. The phosphate combined with B. papyrifera biochar mainly in the forms of exchangeable phosphorus (Ex-P), Al-bound phosphorus (Al-P), and Fe-bound phosphorus (Fe-P). These results indicate that B. papyrifera biochar is a suitable candidate for the treatment of a eutrophic body of water. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

语种： 英文

作者： Qin, Danfeng;Chen, Anran;Mamat, Xamxikamar*;Li, Yongtao*;Hu, Xun;...

期刊： Analytica Chimica Acta,2019年1078:32-41 ISSN：0003-2670

通讯作者： Hu, Guangzhi;Mamat, Xamxikamar;Li, Yongtao

作者机构： [Chen, Anran; Qin, Danfeng; Hu, Guangzhi] Yunnan Univ, Sch Chem Sci & Technol, Minist Educ, Key Lab Med Chem Nat Resource, Kunming 650091, Yunnan, Peoples R China.;[Chen, Anran; Qin, Danfeng; Hu, Guangzhi] Yunnan Univ, Sch Energy, Kunming 650091, Yunnan, Peoples R China.;[Li, Yongtao; Mamat, Xamxikamar; Qin, Danfeng; Hu, Guangzhi; Mamat, X] Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Key Lab Chem Plant Resources Arid Reg, State Key Lab Basis Xinjiang Indigenous Med Plant, Urumqi 830011, Peoples R China.;[Hu, Xun] Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Shandong, Peoples R China.;[Hu, Guangzhi; Wang, Ping] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.

通讯机构： [Hu, Guangzhi] Y;[Mamat, X; Li, YT] C;Yunnan Univ, Sch Chem Sci & Technol, Minist Educ, Key Lab Med Chem Nat Resource, Kunming 650091, Yunnan, Peoples R China.;Yunnan Univ, Sch Energy, Kunming 650091, Yunnan, Peoples R China.;Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Key Lab Chem Plant Resources Arid Reg, State Key Lab Basis Xinjiang Indigenous Med Plant, Urumqi 830011, Peoples R China.

关键词： Cadmium;Differential pulse anodic stripping voltammetry;Dual yolk-shell structure;Lead;Nitrogen doping

摘要： In this work, we report double-shelled yolk-shell Si@C structure as a high-performance electrochemical sensing material for heavy metal ions. A SiO2-assisted polybenzoxazine (PB) coating strategy is used to synthesize highly monodispersed Si@C microspheres. After thermal carbonization of PB layers and selective removal of the SiO2 layers, Si@C microspheres were prepared. The resultant Si@C microspheres exhibit uniform spherical morphology and clearly double-shelled yolk-shell structures. The obtained Si@C microspheres are employed to prepare the chemically modified electrode for the sensitive determination of Cd(II) and Pb(II). By the method of anodic stripping voltammetry, the Si@C-based electrode shows a very wide linear dynamic range for target ions (e.g., 0.5–400 μg L−1 for Cd(II) and Pb(II)) and low limit of detections (e.g., 0.068 μg L−1 for Cd(II) and for 0.105 μg L−1 Pb(II)). The remarkable results, such as excellent resistance to interference ions, good repeatability, and reproducibility were also obtained. Furthermore, compared with those Cd(II) and Pb(II) sensors known in the literature, the analytical performance of Si@C-based electrode is better. Finally, when further used to determine Cd(II) and Pb(II) in tap water and lake water, the results of fabricated electrode successfully achieve good consistency with the data obtained from inductively coupled plasma-mass spectrometry (ICP-MS). © 2019 Elsevier B.V.

语种： 英文

作者： Tang, Chunfang*;Zhang, Riqing;Hu, Xinjiang;Song, Jinfeng;Li, Bing;...

期刊： International Journal of Phytoremediation,2019年21(4):305-315 ISSN：1522-6514

通讯作者： Tang, Chunfang;Hu, Xi;Zhao, Yunlin

作者机构： [Hu, Xi; Tang, Chunfang; Hu, Xinjiang; Ou, Danling; Tang, CF; Hu, X; Song, Jinfeng; Li, Bing] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Zhang, Riqing] Cent South Univ Forestry & Technol, Coll Forestry, Changsha, Hunan, Peoples R China.;[Hu, Xinjiang; Zhao, Yunlin] Cent South Univ Forestry & Technol, Coll Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.

通讯机构： [Tang, CF; Hu, X; Zhao, Yunlin] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Cent South Univ Forestry & Technol, Coll Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.

关键词： antioxidant;cadmium;hydrogen peroxide;malonaldehyde;spermidine;superoxide dismutase;bioremediation;drug effect;oxidative stress;plant leaf;plant root;willow;Antioxidants;Biodegradation, Environmental;Cadmium;Hydrogen Peroxide;Malondialdehyde;Oxidative Stress;Plant Leaves;Plant Roots;Salix;Spermidine;Superoxide Dismutase

摘要： In this study, exogenous spermidine role on Salix matsudana tolerance to cadmium was evaluated. Spermidine and cadmium presented antagonistic effects on the biomass, copper and zinc concentrations in S. matsudana. cadmium mainly distributed in the cell wall of subcellular fraction; 46.97%–60.43% of cadmium existed in a sodium chloride-extracted form. Cadmium contents in roots, leaves, and twigs ranged from 2002.67 to 3961.00, 111.59 to 229.72, and 102.56 to 221.27 mg/kg, respectively. Spermidine application elevated cadmium concentrations in the roots, cuttings, and cell wall and the ratio of deionized water-extracted cadmium, but decreased cadmium levels in the twigs and leaves and the fractions of cadmium extracted by ethanol and sodium chloride, respectively. Putrescine and malondialdehyde were important indicators of cadmium-induced oxidative damage. Exogenous spermidine alleviated the accumulation of superoxide anion, hydrogen peroxide, malondialdehyde via promoting the levels of spermidine, soluble protein, superoxide dismutase, reductive ascorbate, glutathione reductase, and glutathione peroxidase in S. matsudana leaves under the corresponding cadmium stress. The results indicated that S. matsudana was a candidate for cadmium rhizoremediation and extraction in leaves; the spermidine application enhanced the cadmium tolerance of S. matsudana through promoting cadmium accumulation in roots, cell wall, and less bioactive chemical forms and the antioxidative ability. © 2018, © 2018 Taylor & Francis Group, LLC.

语种： 英文

作者： Shu, Yan;Tang, Chunfang*;Hu, Xinjiang;Jiang, Luhua;Hu, Xi;...

期刊： Water,2018年10(6):754-754 ISSN：2073-4441

通讯作者： Tang, Chunfang;Zhao, Yunlin

作者机构： [Hu, Xi; Tang, Chunfang; Hu, Xinjiang; Shu, Yan] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Hu, Xinjiang; Zhao, Yunlin] Cent South Univ Forestry & Technol, Coll Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;[Jiang, Luhua] Hunan Univ, Coll Environm Sci & Engn, Changsha 410084, Hunan, Peoples R China.

通讯机构： [Tang, Chunfang; Zhao, Yunlin] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Cent South Univ Forestry & Technol, Coll Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.

关键词： Biochar;Cr(VI);Process optimization;Removal mechanism;Typha angustifolia

摘要： In this study, Box-Behnken design (BBD) was employed to optimize the process for H<inf>3</inf>PO<inf>4</inf>-activated Typha angustifolia activated carbon (TAC) production and Cr removal by TAC;the removal mechanisms were discussed based on TAC characterization, and the regeneration evaluation was also conducted. The optimum preparation conditions were activated time of 1.5 h, temperature of 469.02 &deg;C, and incubation ratio of 4, resulting in an experimental carbon yield of 38.23% and Cr removal of 90.01%. The optimum adsorption parameters were found to be 0.02 g/50 mL TAC, 80 mg/L Cr(VI), and 2.21 pH with the observed Cr adsorption capacity of 59.54 mg/g. The removal mechanisms involved coulombic attraction, ionic exchange, surface complexation, and reduction. The process of Cr(VI) adsorption was feasible, spontaneous, and endothermic in nature, and the pseudo-second-order and Langmuir isotherm models were more appropriate for the removal process. After five adsorption/desorption cycles, the Cr adsorption capacity on TAC reduced by only 24.37%. The results showed that BBD could successfully optimize TAC production and Cr removal, and TAC could be developed as a promising, eco-friendly, and effective adsorbent for Cr pollution control.<br/> &copy;2018 by the authors.

语种： 英文

作者： Cai, Xiaoxi;Li, Jiang*;Liu, Yunguo*;Yan, Zhili;Tan, Xiaofei;...

期刊： JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY,2018年93(3):783-791 ISSN：0268-2575

通讯作者： Li, Jiang;Liu, Yunguo

作者机构： [Li, Jiang; Liu, Yunguo; Zeng, Guangming; Gu, Yanling; Jiang, Luhua; Tan, Xiaofei; Cai, Xiaoxi; Yan, Zhili] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Liu, Yunguo; Zeng, Guangming; Gu, Yanling; Jiang, Luhua; Tan, Xiaofei; Cai, Xiaoxi; Yan, Zhili; Li, Jiang] Hunan Univ, Key Lab Environm Biol & Pollut Control, Changsha, Hunan, Peoples R China.;[Cai, Xiaoxi] Hunan First Normal Univ, Coll Art & Design, Changsha, Hunan, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Architecture & Art, Changsha, Hunan, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Met & Environm, Changsha, Hunan, Peoples R China.

通讯机构： [Li, J; Liu, YG] H;Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.

关键词： Adsorption;Biomass;Characterization;Chemical industry;Coated materials;Complexation;Composite materials;Degradation;Organic pollutants;Oxides;Photocatalysis;Sols;Solutions;Titanium;Titanium compounds;Adsorption performance;Aqueous organic pollutants;Bio chars;Effect of adsorptions;High specific surface area;Photo catalytic degradation;Photo-catalytic;Photocatalytic activities;Titanium dioxide;biochar;charcoal;dye;nanocomposite;safranine T;titanium dioxide;unclassified drug;adsorption;aqueous solution;Article;biomass;chemical composition;concentration (parameters);controlled study;infrared spectroscopy;material coating;molecular stability;organic pollution;pH;photocatalysis;photodegradation;pyrolysis;recycling;scanning electron microscopy;surface area;surface property;synthesis;time;ultraviolet irradiation;waste component removal;X ray diffraction;X ray photoelectron spectroscopy

摘要： BACKGROUND: This article reports the synthesis and characterisation of titanium dioxide-coated biochar composites (TBCs) by pyrolysing titanium dioxide-treated biomass prepared by a modified sol–gel method. Their adsorptive and photocatalytic activities were evaluated based on the removal of safranine T (ST) from an aqueous solution with/without UV-light irradiation. RESULTS: Characterisation studies suggested that TiO2 was successfully loaded on the biochar substrate. The biochar and TiO2 contents of the composite significantly affected its performance. The ST removal capabilities of the TBCs with 1, 1.5, 2, and 2.5 g of the biomass are 1.7, 2.3, 7.2, and 2.3 times better than that of the raw biochar, respectively. Thus, the optimum amount of biomass in TBC-x was determined to be 2 g, with the corresponding sample exhibiting excellent stability, effectiveness over a wide pH range, and a maximum ST removal capacity of 226.7 mg g-1. CONCLUSION: The loading of TiO2 significantly enhanced the adsorption performance of biochar and the high specific surface area of the biochar synergistically promoted the photocatalytic activity of TiO2. Both adsorption and photocatalytic degradation were confirmed to contribute to the decolourisation of the aqueous solution because of the removal of ST, with the effect of adsorption being slightly higher than that of photocatalysis. The synthesised composite is a promising alternative material for removing chemical contaminants. © 2017 Society of Chemical Industry. © 2017 Society of Chemical Industry

语种： 英文

作者： Wang, Hui;Hu, Xinjiang;Guo, Yuan;Qiu, Caisheng;Long, Songhua;...

期刊： JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY,2018年93(8):2447-2455 ISSN：0268-2575

通讯作者： Wang, Yufu;Liu, Yunguo

作者机构： [Guo, Yuan; Wang, Hui; Xu, Wenwen; Long, Songhua; Wang, Yufu; Hao, Dongmei; Qiu, Caisheng] Chinese Acad Agr Sci, Inst Bast Fiber Crops, Changsha 410205, Hunan, Peoples R China.;[Guo, Yuan; Wang, Hui; Xu, Wenwen; Long, Songhua; Wang, Yufu; Hao, Dongmei; Qiu, Caisheng] Chinese Acad Agr Sci, Ctr Southern Econ Crops, Changsha 410205, Hunan, Peoples R China.;[Hu, Xinjiang] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha, Hunan, Peoples R China.;[Cai, Xiaoxi] Hunan First Normal Univ, Coll Art & Design, Changsha, Hunan, Peoples R China.;[Liu, Yunguo; Cai, Xiaoxi] Hunan Univ, Coll Environm Sci & Engn, Changsha, Hunan, Peoples R China.

通讯机构： [Wang, Yufu] C;[Liu, Yunguo] H;Chinese Acad Agr Sci, Inst Bast Fiber Crops, Changsha 410205, Hunan, Peoples R China.;Chinese Acad Agr Sci, Ctr Southern Econ Crops, Changsha 410205, Hunan, Peoples R China.;Hunan Univ, Coll Environm Sci & Engn, Changsha, Hunan, Peoples R China.

关键词： Alkalinity;Copper compounds;Graphene;Graphene oxide;Metal ions;Pollution;Sodium chloride;Solutions;Alternative materials;Characterization techniques;Copper ions;External influences;Graphene oxide nanosheets;Increasing solutions;Oxygen-containing functional groups;Pollutant removal;Adsorption;benzoic acid;copper ion;formic acid;functional group;graphene oxide;nanosheet;oxygen;sodium chloride;adsorption;aqueous solution;Article;crystal structure;heavy metal removal;ionic strength;pH;zeta potential

摘要： BACKGROUD: In this work, graphene oxide (GO) was synthesized followed by a modified Hummers method and several characterization techniques were provided. Its adsorptive activity was evaluated based on the removal of Cu(II) from an aqueous solution. External influences were taken into account to further study the adsorption mechanism. RESULT: Characterization results revealed that GO was well prepared and a large amount of oxygen-containing functional groups were introduced. The Cu(II) adsorption increased with increasing solution pH and precipitate at alkaline conditions. NaCl concentration improved copper adsorption at low pH. Formate reduced copper adsorption while benzoate improved the adsorption under low pH conditions. CONCLUSIONS: Here, GO performed Cu(II) adsorption well. The external conditions have different influences on the adsorption process. Experimental results demonstrate that GO is a promising alternative material for pollutants removal. © 2018 Society of Chemical Industry. © 2018 Society of Chemical Industry

语种： 英文

作者： Zhang, Xiaoxiao;Shao, Jihai;Chen, Anwei*;Shang, Cui;Hu, Xinjiang;...

期刊： Ecotoxicology and Environmental Safety,2018年157:95-101 ISSN：0147-6513

通讯作者： Chen, Anwei

作者机构： [Luo, Si; Peng, Liang; Shang, Cui; Zhang, Xiaoxiao; Shao, Jihai; Zeng, Qingru; Chen, Anwei; Lei, Ming] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Hu, Xinjiang] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.

通讯机构： [Chen, Anwei] H;Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.

关键词： Cadmium;Calcium;Homeostasis;Phanerochaete chrysosporium;Stress

摘要： Due to the widespread application of white-rot fungi for the treatment of pollutants, it's crucial to exploit the special effects of pollutants on the microbes. Here, we studied the effects of cadmium on calcium homeostasis in the most studied white-rot fungus Phanerochaete chrysosporium. The response of P. chrysosporium to cadmium stress is concentration-dependent. A high concentration of cadmium caused the release of calcium from P. chrysosporium, while a hormesis effect was observed at a lower cadmium concentration (10 μM), which resulted in a significant increase in calcium uptake and reversed the decrease in cell viability. Calcium (50 μM) promoted cell viability (127.2% of control), which reflects that calcium can protect P. chrysosporium from environmental stress. Real-time changes in the Ca2+ and Cd2+ fluxes of P. chrysosporium were quantified using the noninvasive microtest technique. Ca2+ influx decreased significantly under cadmium exposure, and the Ca2+ channel was involved in Ca2+ and Cd2+ influx. The cadmium and/or calcium uptake results coupled with the real-time Ca2+ and Cd2+ influxes microscale signatures can enhance our knowledge of the homeostasis of P. chrysosporium with respect to cadmium stress, which may provide useful information for improving the bioremediation process. © 2018 Elsevier Inc.

语种： 英文

作者： Hu, Xinjiang*;Zhao, Yunlin*;Wang, Hui;Cai, Xiaoxi;Hu, Xi;...

期刊： JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY,2018年93(8):2226-2233 ISSN：0268-2575

通讯作者： Hu, Xinjiang;Zhao, Yunlin

作者机构： [Hu, Xi; Tang, Chunfang; Hu, Xinjiang; Zhao, Yunlin; Zhao, YL] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Hu, Xinjiang; Zhao, Yunlin] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha, Hunan, Peoples R China.;[Wang, Hui] Chinese Acad Agr Sci, Inst Bast Fiber Crops, Changsha, Hunan, Peoples R China.;[Yang, Yuanxiu] South China Agr Univ, Coll Nat Resources & Environm, Guangzhou, Guangdong, Peoples R China.;[Liu, Yunguo; Cai, Xiaoxi] Hunan Univ, Coll Environm Sci & Engn, Changsha, Hunan, Peoples R China.

通讯机构： [Hu, XJ; Zhao, YL] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.

关键词： Chemicals removal (water treatment);Decontamination;Gas adsorption;Graphene;Irradiation;Metal ions;pH effects;Titanium dioxide;Electron transfer pathways;Environmental conditions;Ferric ions;Formate;Hexavalent chromium;Inorganic anions;Nitrogen adsorption desorption isotherms;Wastewater characteristics;Chromium compounds;chromium;ferric ion;formic acid;graphene oxide;titanium dioxide;Article;comparative study;decontamination;field emission scanning electron microscopy;oxidation reduction reaction;pH;photocatalysis;surface area;synthesis;ultraviolet irradiation;ultraviolet radiation

摘要： <jats:title>Abstract</jats:title><jats:sec><jats:title>BACKGROUND</jats:title><jats:p>In this study, a graphene oxide@TiO<jats:sub>2</jats:sub> composite (GO/TiO<jats:sub>2</jats:sub>) was prepared and characterized by SEM, EDX, XRD, nitrogen adsorption–desorption isotherm, and XPS. Photocatalytic reduction and removal of Cr(VI) using this composite in an aerobic atmosphere were studied under UV irradiation. The effects of pH, ferric ions, inorganic anions, and formate were investigated systematically.</jats:p></jats:sec><jats:sec><jats:title>RESULTS</jats:title><jats:p>The Cr(VI) reduction rate decreased with increasing solution pH. The presence of ferric ions in the system improved the photocatalytic reduction process. The effects of SO<jats:sub>4</jats:sub><jats:sup>2−</jats:sup> and PO<jats:sub>4</jats:sub><jats:sup>3−</jats:sup> on the process were higher than those of Cl<jats:sup>−</jats:sup> and NO<jats:sub>3</jats:sub><jats:sup>−</jats:sup>. Formate slightly inhibited adsorption of Cr(VI), while it improved Cr(VI) reduction. GO/TiO<jats:sub>2</jats:sub> has good stability and it maintained full photoreduction activity for at least three cycles.</jats:p></jats:sec><jats:sec><jats:title>CONCLUSION</jats:title><jats:p>The results indicated that GO/TiO<jats:sub>2</jats:sub> can thermodynamically reduce Cr(VI) to Cr(III) under UV light. Environmental conditions and wastewater characteristics (e.g. pH, ferric ions, inorganic anions, and formate) can influence the decontamination process because they affect the interactions between chromium ions and GO/TiO<jats:sub>2</jats:sub> and alter the electron‐transfer pathways. The results suggest that the GO/TiO<jats:sub>2</jats:sub> is an attractive material for removing hexavalent chromium from water using a photocatalytic process. © 2018 Society of Chemical Industry</jats:p></jats:sec>

语种： 英文

作者： Jiang, Luhua;Liu, Yunguo*;Zeng, Guangming;Liu, Shaobo;Hu, Xinjiang;...

期刊： Chemical Engineering Journal,2018年339:296-302 ISSN：1385-8947

通讯作者： Liu, Yunguo

作者机构： [Jiang, Luhua; Liu, Yunguo; Zeng, Guangming; Tan, Xiaofei; Li, Meifang; Liu, Ni] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Jiang, Luhua; Liu, Yunguo; Zeng, Guangming; Tan, Xiaofei; Li, Meifang; Liu, Ni] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China.;[Hu, Xinjiang] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn Res, Changsha 410004, Hunan, Peoples R China.;[Zhou, Lu] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410004, Hunan, Peoples R China.

通讯机构： [Liu, Yunguo] H;Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.

关键词： Estrogen contaminants;Graphene nanosheets;Natural organic matter;Reduction degree

摘要： In this research, adsorption of two estrogens, namely, 17&beta;-estradiol (E2) and 17&alpha;-ethynylestradiol (EE2), by graphene nanosheets with different reduction degrees (rGOs) were investigated;and the effects of solution chemistry, such as natural organic matter (NOM), pH and ionic strength (IS), on the E2 and EE2 adsorption behaviors were also examined. Results indicated that adsorption abilities of estrogens increased with increasing the reduction degree of rGOs;the &pi;&ndash;&pi;stacking interaction could be considered as a predominant interaction to the enhanced adsorption capacities of rGOs. Among the solution chemistry, NOM exhibited the significant influence on estrogens adsorption, which suggested that once released into water environments, graphene materials will adsorb estrogens but with a lower adsorption ability than that in ultrapure water due to the ubiquitous presence of NOM in aquatic environments. Besides, estrogens adsorption on rGOs was pH-dependent, but the influence of acid rain would be insignificant due to slight change in low pH range. However, IS within the typical range in natural waters did not exhibit significant influence on the uptake of estrogens by rGOs. Above findings of this work might have significant implications for the fate and transport of estrogens with graphene materials in the environment.<br/> &copy;2017

语种： 英文