作者：
Su, Rongkui;Ou, Qiqi;Wang, Hanqing;Dai, Xiangrong;Chen, Yonghua;...
期刊：
Environmental Science and Pollution Research,2023年30(19):56569-56579 ISSN：0944-1344
通讯作者：
Yonghua Chen
作者机构：
[Ouyang, Danxia; Wang, Zhixiang; Su, Rongkui; Wang, Hanqing; Yao, Haisong; Chen, Yonghua; Li, Zishi; Ou, Qiqi] Cent South Univ Forestry & Technol, Sch Environm Sci & Engn, Changsha 410004, Peoples R China.;[Dai, Xiangrong; Su, Rongkui] PowerChina Zhongnan Engn Corp Ltd, Changsha 410004, Peoples R China.;[Luo, Yiting] Hunan First Normal Univ, Changsha 410205, Peoples R China.
通讯机构：
[Chen, Yonghua] S;School of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, People's Republic of China.
摘要：
The activation of persulfate has received considerable attention for its potential application in the removal of pollutants. In recent years, various technologies have been developed to catalyze its activity, which can be classified into two main methods: homogeneous and non-homogeneous activation. Homogeneous activation methods encompass thermal activation, photoactivation, ultrasonic activation, electrical activation, microwave activation, and transition metal ion activation. What is more, non-homogeneous activation methods include activation through metal-based nanomaterials, MOF material activation, single-atom catalysts, piezoelectric effect activation, and carbon activation. In this review, it presents a comprehensive overview about the advantages and disadvantages of these activation methods, as well as the main reaction mechanisms. Additionally, chemical identification methods such as quenching, chemical probes, and isotope techniques are discussed. Furthermore, the article explores two characterization methods, electron paramagnetic resonance, in situ Fourier transform infrared spectroscopy and Raman spectroscopy, and mass spectrometry, and their application in experimental studies. Finally, the current limitations of each technique and future research directions are discussed and prospected. This article aims to provide valuable insights into the various activation methods of persulfate and their applications in the field of environmental science and technology.
摘要：
The scientific design and preparation of porous carbon with high VOCs (such as acetone) adsorption capacity are crucial for waste gas treatment. However, it is still challenging to explain the microscopic mechanism of acetone uptake on porous carbon because of the different adsorption conditions, as well as various chemical properties and different pore structures of porous carbon. Here, the prediction model of the adsorption conditions, nitrogen/oxygen groups and pore structures on acetone adsorption capacity was established by machine learning, and the contribution of the nitrogen/oxygen groups and pore structures of porous carbons to the acetone adsorption capacity at different adsorption pressures was discussed. The results display that the nitrogen/oxygen groups and micropore volume are the main factors affecting the adsorption capacity of acetone at relatively low pressure, while the adsorption capacity at relatively high pressure is determined by total pore volume. Subsequently, three kinds of porous carbon with different oxygen content and gradient pore size distribution were synthesized, and acetone adsorption isotherms were tested. The effects of chemical properties and pore structure on acetone adsorption at different pressure were studied, and the results were consistent with those of machine learning. However, the results are challenging to illustrate the effect of single pore size and functional group type on acetone adsorption performance. Finally, molecular simulation was used to calculate acetone adsorption isotherms with various nitrogen/oxygen groups and different pore sizes, further revealing the adsorption mechanism of acetone with nitrogen/oxygen groups and pore size. Based on machine learning and molecular simulation results, new insights into the adsorption behavior of acetone were revealed, providing theoretical support for the sustainable development of carbon-based adsorbents for acetone waste gas treatment.
摘要：
Previous studies often utilized metal catalysts in the preparation of photoelectrodes. However, this research marks the first instance of utilizing biochar as a catalyst in such a preparation. The biochar catalytic layer was synthesized by loading sewage sludge-derived biochar onto nickel foam using the sol-gel method. The performance of the photoelectrode was evaluated using tetracycline (TC) as a probe. The photoelectrode BCPE-800, prepared using biochar derived at 800 & DEG;C, achieved 98.52% TC degradation within 60 min, with a reaction rate constant of 0.0635 min(-1). It also exhibited excellent stability and recyclability, maintaining 90% removal efficiency after six cycles. Quenching experiments and EPR spectroscopy showed that h(+) acted as the primary active species, while OH and O-1(2) also contributed to the TC degradation. Based on the intermediates identified by LC-MS, the study proposed two degradation pathways. The research effectively recycled sewage sludge and offered cost-effective possibilities for photoelectrocatalytic technology, highlighting its practical applications.
期刊：
Chemical Engineering Journal,2023年460:141838 ISSN：1385-8947
通讯作者：
Liang, Jie(liangjie@hnu.edu.cn)
作者机构：
[Huang, Wei; Liang, Jie; Deng, Jiaqin] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China.;[Huang, Wei; Liang, Jie; Deng, Jiaqin] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Peoples R China.;[Xia, Xinghui; Huang, Wei] Beijing Normal Univ, Sch Environm, Key Lab Water & Sediment Sci, State Key Lab Water Environm Simulat,Minist Educ, Beijing 100875, Peoples R China.;[Deng, Jiaqin] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.
通讯机构：
[Jie Liang] C;[Xinghui Xia] K;Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China<&wdkj&>College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
作者机构：
[王小利] Agricultural College of Guizhou University, Guiyang, 550025, China;[李宇虹; 吴金水; 葛体达; 祝贞科] Key Laboratory of Agro Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China;[李科林] School of Environmental Science and Engineering, Central South Forestry University, Changsha, 410004, China;[江家彬] Agricultural College of Guizhou University, Guiyang, 550025, China, Key Laboratory of Agro Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China;[林森] Key Laboratory of Agro Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China, School of Environmental Science and Engineering, Central South Forestry University, Changsha, 410004, China
通讯机构：
[Wang, X.] A;[Zhu, Z.] K;Agricultural College of Guizhou UniversityChina;Key Laboratory of Agro Ecological Processes in Subtropical Region, China
摘要：
Advanced oxidation technology represented by hydroxyl radicals has great potential to remove residual antibiotics. In this study, we systematically compared the metronidazole (MTZ) degradation behavior and mechanism in the UV and UV/H2O2 systems at pH 3.00 condition. The results show that the initial reaction rates were 0.147 and 1.47 mu M min(-1) in the UV and UV/H2O2 systems, respectively. The main reason for the slow direct photolysis of MTZ is the relatively low molar absorption coefficient (2645.44 M-1 cm(-1)) and quantum yield (5.9 x 10(-3) mol Einstein(-1)). Then, we measured k(MTZ,center dot OH) as 2.79 (+/- 0.12) x 10(9) M-1 s(-1) by competitive kinetics, and calculated k(MTZ,center dot OH) and [(OH)-O-center dot](SS) as 2.43 (+/- 0.11) x 10(9) M-1 s(-1) and 2.36 x 10(-13) M by establishing a kinetic model based on the steady-state hypothesis in our UV/H2O2 system. The contribution of direct photolysis and (OH)-O-center dot to the MTZ degradation was 9.9% and 90.1%. (OH)-O-center dot plays a major role in the MTZ degradation, and (OH)-O-center dot was the main active material in the UV/H2O2 system. This result was also confirmed by MTZ degradation and radicals' identification experiments. MTZ degradation increases with H2O2 dosage, but excessive H2O2 had the opposite effect. A complex matrix has influence on MTZ degradation. Organic matter could inhibit the degradation of MTZ, and the quenching of the radical was the main reason. NO3- promoted the MTZ degradation, while SO42- and Cl- had no effect. These results are of fundamental and practical importance in understanding the MTZ degradation, and to help select preferred processes for the optimal removal of antibiotics in natural water bodies, such as rivers, lakes, and groundwater
期刊：
Science of The Total Environment,2022年818:151801 ISSN：0048-9697
通讯作者：
Hang Zhou
作者机构：
[Wei, Binyun; Liao, Bohan; Zeng, Peng; Gu, Jiaofeng; Zhou, Hang] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.;[Liao, Bohan; Zeng, Peng; Gu, Jiaofeng; Zhou, Hang] Cent South Univ Forestry & Technol, Hunan Engn Lab Control Rice Qual & Safety, Changsha 410004, Peoples R China.
通讯机构：
[Hang Zhou] C;College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China<&wdkj&>Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha 410004, China
关键词：
Accumulation;Cd and As co-contaminated soil;Foliar spraying silicon;Rice;Water management
摘要：
Water management is an effective measure for the control of cadmium (Cd) and arsenic (As) in situ uptake and transport in rice. In this study, the effects of the co-application of foliar spraying silicon (Si) and water management on Cd and As uptake and transport in rice were studied under paddy soils that were seriously co-contaminated with Cd and As with a two-year field experiment. The results showed that the co-application of water management and foliar spraying Si could effectively decrease the bioavailability of Cd and As in soil and reduce the uptake and transport of Cd and As in rice. The co-application of water management and foliar spraying Si treatments decreased the exchangeable and TCLP extractable Cd and As contents in the soil. Especially for moisture at the maturing stage combined with foliar spraying Si treatment (MMS), the exchangeable and TCLP extractable Cd and As contents were significantly decreased by 48.49%-55.14% and 45.50%-54.67%, and 41.95%-56.73% and 37.80%-46.76% in the two seasons, respectively. The moisture at the maturing stage treatment significantly decreased the Cd and As contents in brown rice by 4426%-48.59% and 23.90%-38.16% in the two seasons relative to the control, respectively. Furthermore, MMS treatment simultaneously inhibited Cd and As transport and accumulation in rice among all co-application treatments. The translocation factor (TF)(stem-brown rice) of Cd, TFstem-leaf of As, and TFstem-brown rice of As values in the MMS treatment were significantly decreased as compared with the MM treatment. Furthermore, both the Cd and As contents in brown rice under the MMS treatment significantly decreased by 15.33%-30.74% and 33.84%-40.80%, respectively, in the two seasons. The results suggested that foliar spraying Si combined with moisture at the maturing stage might be a promising measure to synchronously inhibit the transport and accumulation of Cd and As in rice. (C) 2021 Elsevier B.V. All rights reserved.
作者机构：
[Bohan, Liao; Hang, Zhou; Yang, Huo; Jiaofeng, Gu; Peng, Zeng] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.;[Bohan, Liao; Hang, Zhou; Jiaofeng, Gu; Peng, Zeng] Cent South Univ Forestry & Technol, Hunan Engn Lab Control Rice Qual & Safety, Changsha 410004, Peoples R China.
通讯机构：
[Zhou Hang] C;College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China<&wdkj&>Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha, 410004, China
期刊：
International Journal of Environmental Research and Public Health,2022年19(19):12381- ISSN：1661-7827
通讯作者：
Zhiming Liu<&wdkj&>Jian Zhu
作者机构：
[Zhu, Yelin; Liu, Zhiming; Long, Zihan; Zhu, Jian; Wang, Ping] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.;[Ma, Chunya] Longyou Ecol Environm Protect Agcy, Quzhou 324400, Peoples R China.;[Ma, Chunya] Longyou Ecol Environm Monitoring Stn, Quzhou 324400, Peoples R China.;[Liu, Zhiming] Eastern New Mexico Univ, Dept Biol, Portales, NM 88130 USA.
通讯机构：
[Zhiming Liu; Jian Zhu] A;Authors to whom correspondence should be addressed.<&wdkj&>Department of Biology, Eastern New Mexico University, Portales, NM 88130, USA<&wdkj&>College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
摘要：
Carbonaceous materials have proved to be effective in cadmium remediation, but their influences on soil microecology have not been studied well. Taking the structural differences and the maintenance of soil health as the entry point, we chose graphene (G), multi-walled carbon nanotubes (MWCNTs), and wetland plant-based biochar (ZBC) as natural and engineered carbonaceous materials to explore their effects on Cd fractions, nutrients, enzyme activities, and microbial communities in soils. The results showed that ZBC had stronger electronegativity and more oxygen-containing functional groups, which were related to its better performance in reducing soil acid-extractable cadmium (EX-Cd) among the three materials, with a reduction rate of 2.83-9.44%. Additionally, ZBC had greater positive effects in terms of improving soil properties, nutrients, and enzyme activities. Redundancy analysis and correlation analysis showed that ZBC could increase the content of organic matter and available potassium, enhance the activity of urease and sucrase, and regulate individual bacterial abundance, thereby reducing soil EX-Cd. Three carbonaceous materials could maintain the diversity of soil microorganisms and the stability of the microbial community structures to a certain extent, except for the high-dose application of ZBC. In conclusion, ZBC could better immobilize Cd and maintain soil health in a short period of time.
