期刊：
Science of The Total Environment,2024年906:167219 ISSN：0048-9697
通讯作者：
Wang, Ping;Zhu, J
作者机构：
[Zhou, Tao; Sun, Jikang; Xing, Qinqin] Cent South Univ Forestry & Technol, Coll Life Sci & Technol, 498 South Shaoshan Rd, Changsha 410004, Hunan, Peoples R China.;[Wang, Ping; Zhu, Jian; Zhu, J] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, 498 South Shaoshan Rd, Changsha 410004, Peoples R China.;[Liu, Zhiming] Eastern New Mexico Univ, Dept Biol, Portales, NM 88130 USA.
通讯机构：
[Wang, P; Zhu, J ] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, 498 South Shaoshan Rd, Changsha 410004, Peoples R China.
关键词：
Cd stress;Koelreuteria paniculata;KpMIPS;Resistance
摘要：
Cadmium (Cd) pollution in soil is an important factor endangering plant growth and harming human health through food chains. Koelreuteria paniculata is an important woody plant for ecological restoration of Cd-contaminated soils. In this study, KpMIPS gene of K. paniculata was cloned, and the expressed protein (60kDa) had 1-phosphate synthase activity. The results showed that KpMIPS significantly promoted root development of K. paniculata and Arabidopsis thaliana, reduced damage to the roots of Arabidopsis thaliana caused by Cd, and decreased transfer of Cd to the aboveground parts of K. paniculata and Arabidopsis thaliana . In the K. paniculata plants overexpressing KpMIPS integrity of the root cells was maintained and the content of pectin and phytic acid was significantly increased. Overexpression of KpMIPS increased the Cd accumulation in the roots and decreased the Cd content in the stems and leaves. Clearly, KpMIPS could regulate the contents of pectin and phytic acid in K. paniculata, thereby passivating Cd(2+) and enriching it in the root cell wall, reducing the transfer of free Cd(2+) to other parts of K. paniculata, and providing a positive regulatory effect on the Cd resistance of K. paniculata. The results of the study provide a technical introduction for the selection and genetic improvement of target genes regulating heavy metal resistance of plants in phytoremediation technology.
摘要：
A novelty in-situ heterogeneous electro-Fenton based on boron-modified and co-modified carbon felts (CF) such as B-CF, B, Fe-CF and B, Co-CF was employed for phosphorus nutrients treatment in dredged sediment. During which B, Fe-CF (1:1) was the optimal cathode for phosphorus nutrients and organic matter treatment with organic phosphorus (OP) and non-apatite inorganic phosphorus (Fe-P) conversion rates of 26.84% and 63.21%, respectively, since the generated H2O2 on bifunctional cathode could produce center dot OH with material surface reduced Fe(II). Characterized by SEM, XRD and XPS, B and Fe were successfully loaded on the electrode with elemental percentages of 0.99% and 4.40%, while B2O3 and Fe2O3 were detected. The operating parameters like initial pH and current density were explored. B, Fe-CF had a high stability and outstanding catalytic capacity for 5 cycles of phosphorus nutrient treatment. The possible mechanism was also proposed based on the electron paramagnetic resonance (EPR) and radical quenching experiment, which demonstrated that center dot OH and SO4 center dot- mainly contributed to phosphorus nutrients treatment. In this work, a highly efficient and stable carbon material was successfully prepared to treat refractory pollutants in dredging sediment, which provides new ideas and methods for subsequent resource utilization.
作者机构：
[Xing, Liping; Liu, Jiahao; Xia, Jing; Ding, Ziyi; Wang, Ping; Lan, Jiaxin] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China;[Zhou, Lean] Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province/School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha, 410114, China;[Cai, Jingju] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China. Electronic address: caijj7692@csuft.edu.cn;[Zhu, Jian] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China. Electronic address: znlzhujian@csuft.edu.cn
通讯机构：
[Jingju Cai; Jian Zhu] C;College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
摘要：
Electrochemical activation of persulfate (EA-PS) is gradually attracting attention as an emerging method for wastewater treatment. In this study, a novelty flow-through EA-PS system was first attempted for pollutants degradation using boron and cobalt co-doping carbon felt (B, Co-CF) as the cathode. SEM images, XPS and XRD spectra of B, Co-CF were investigated. The optimal doping ration between B and Co was 1:2. Increasing current density, PS concentration and flow rate, decreasing initial pH accelerated the removal of AO7. The mechanism involved in EA-PS were the comprehensive effect of DET, (•)OH and SO(4)(•-). B, Co-CF cathode for flow-through system was stable with five cycles efficient AO7 decay performance. EA-PS in flow-through system was an efficient method with low cost and efficient pollutants degradation. This work provides a feasible strategy for synergistically enhancing PS activation and promoting the degradation of organic pollutants.
期刊：
Chemical Engineering Journal,2023年471:144651 ISSN：1385-8947
通讯作者：
Wang, BL;Zhu, J;Hu, GZ
作者机构：
[Wang, Baoling; Deng, Xiujun; Huang, Ruihua] Kunming Univ, Sch Chem & Chem Engn, Yunnan Key Lab Met Organ Mol Mat & Device, Kunming 650214, Yunnan, Peoples R China.;[Zhang, Hua; Li, Xueyan; Shi, Anxian] Green Food Dev Ctr Zhaotong City, Zhaotong 657099, Peoples R China.;[Zhu, Jian; Huang, Ruihua; Zhu, J] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.;[Zuo, Zesen; Hu, Guangzhi] Yunnan Univ, Inst Ecol Res & Pollut Control Plateau Lakes, Sch Ecol & Environm Sci, Kunming 650504, Yunnan, Peoples R China.
通讯机构：
[Wang, BL ] K;[Zhu, J ] C;[Hu, GZ ] Y;Kunming Univ, Sch Chem & Chem Engn, Yunnan Key Lab Met Organ Mol Mat & Device, Kunming 650214, Yunnan, Peoples R China.;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.
关键词：
Electrochemical sensors;Heavy metal determination;BNSP-C;Food sample
摘要：
Designing and synthesizing efficient and economical electro-sensing interface materials is essential for screening trace heavy metal ions in foods. In this study, we developed a multi-doped BNSP-C material with Zeolitic imidazolate framework-8 (ZIF-8) and non-metallic atoms (B, N, S, and P) for the simultaneous detection of the heavy metals Cd(II) and Pb(II) in complex food samples. The in situ doping of heteroatoms positively modifies the microstructure and current efficiency of the carbon precursor, creating additional active sites and defects, and imparting the material with improved electrical properties. The detection system optimized by square-wave anodic stripping voltammetry, was sensitive up to 1.290 and 0.661 mu A & sdot;mu M 1 & sdot;cm � 2. BNSP-C-Nafion/GCE has a high selectivity for target ions under the challenge of multiple coexisting ions and molecules. Furthermore, the current signals of Cd(II) and Pb(II) only dropped to 97.19 % and 98.98 % of the initial currents after a 30-day stability test. The strong catalytic activity and persistence of the BNSP-C-Nafion sensor were confirmed. This study explored the enhancement and detection of the ZIF-based electrochemical signals. In addition, we provided a convenient and green electrochemical technique for the simultaneous detection of Cd(II) and Pb(II).
通讯机构：
[Zhu, Jian] C;[Liu, Zhiming] E;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.;Eastern New Mexico Univ, Dept Biol, Portales, NM 88130 USA.
关键词：
Accumulation and translocation;Cadmium;Mineral silicon;Rice (Oryza sativa L.);Soil health
摘要：
Exogenous silicon has been shown to enhance plant growth and alleviate heavy metals toxicity, but the regulation mechanismof silicon on cadmiummigration and transformation in the soil-rice systemis still unclear, which isworth further study. In this study, a pot experiment was carried out to explore the influence of different doses (0, 1 and 5%) of mineral silicon on soil properties, nutrient availability, rice growth, soil enzyme activities, Cd bioavailability, and uptake and accumulation of Cd in high-accumulating (H) and low-accumulating (L) rice cultivars grown in contaminated soils. Results showed that mineral-Si treatment could increase the total biomass and grain yield, with an increased rate of 17.7-27.3% and 14.7-19.1% for H; while 26.2-33.4% and 21.3-30.3% for L. Compared with non-mineral-Si treatment, the soil EX-Cd decreased by 3.9-13.3% (H) and 2.3-10.7% (L). Additionally, the Cd content in rice grain was significantly declined by 29.5-31.3% (H) and 34.9-35.2% (L). MineralSi enhanced urease, sucrase, and neutral phosphatase activities in both cultivars, but suppressed catalase activity in H. A selective change in bacterial community structure was observed under mineral-Si treatment, however, the bacterial community remained stable, suggesting that the mineral-Si had no adverse effect on the microbial community. The positive response of soil enzymes activities, rice growth and the overall stabilization of microbial environment for mineral-Si addition to the Cd contaminated soils indicated that mineral-Si could mitigate the risk of Cd and well maintain the soil health, proving it to be eco-friendly and low-cost amendment for soils remediation. (C) 2020 Published by Elsevier B.V.
期刊：
Surfaces and Interfaces,2021年25:101266 ISSN：2468-0230
通讯作者：
Jian Zhu<&wdkj&>Xiaohua Li<&wdkj&>Guangzhi Hu
作者机构：
[Zhu, Yelin; Zhu, Jian; Wang, Ping] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Peoples R China.;[Zhang, Dafeng] Liaocheng Univ, Sch Mat Sci & Engn, Liaocheng 252000, Shandong, Peoples R China.;[Zhu, Yelin; Tan, Fang; Chang, Fengqin; Hu, Guangzhi] Yunnan Univ, Sch Ecol & Environm Sci, Inst Ecol Res & Pollut Control Plateau Lakes, Kunming 650504, Yunnan, Peoples R China.;[Li, Xiaohua] Minist Agr & Rural Affairs, Rural Energy & Environm Agcy, Beijing 100125, Peoples R China.;[Hu, Guangzhi; Li, Lei] Jiaxing Univ, Coll Biol Chem Sci & Engn, Jiaxing 314001, Peoples R China.
通讯机构：
[Jian Zhu] C;[Xiaohua Li] R;[Guangzhi Hu] I;College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.<&wdkj&>Rural Energy & Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing 100125, P.R. China.<&wdkj&>Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650504, China.<&wdkj&>College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
关键词：
Electrochemical sensor;CoFe2O4-CoFe;DPASV;Heavy metal determination
摘要：
In this study, CoFe2O4-CoFe microspheres were synthesized using a simple hydrothermal method and treated in a furnace at a high temperature. The structure and morphology of the CoFe2O4-CoFe microspheres were well characterized by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) pattern, and X-ray photoelectron spectroscopy (XPS). The glassy carbon electrode (GCE) modified with CoFe2O4-CoFe as an electrochemical sensor exhibited excellent electrochemical activity for the detection of both Pb(II) and Cd(II) ions via differential pulse anodic stripping voltammetry (DPASV). The related measurement conditions of the proposed electrochemical sensor were optimized by changing the deposition potential, deposition time, and pH value of the electrolyte. Under optimized conditions, the CoFe2O4-CoFe-based electrochemical sensor exhibited broad linear ranges of 5.0-400 and 5.0-320 mu g L-1 with limits of detection (LODs) of 0.50 and 0.26 mu g L-1 for the Cd(II) and Pb(II) ions, respectively. In addition, the results of the interference and actual water sample analyses showed that the peak currents of target ion were not strongly interfered with, by 50-times interference ions, such as Al(III), As(III/V), Ca(II), Cr(III), and Zn(II). The proposed CoFe2O4-CoFe microsphere-based electrochemical sensor can be potentially applied to detect Pb(II) and Cd(II) ions in untreated tap water and other environmental samples, simultaneously.
期刊：
IOP Conference Series: Earth and Environmental Science,2021年690(1):012002 ISSN：1755-1307
作者机构：
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China;Department of Biology, Eastern New Mexico University, Portales, NM 88130, United States
会议名称：
2020 International Symposium on Water, Ecology and Environment, ISWEE 2020
会议时间：
6 December 2020 through 8 December 2020
关键词：
Bacteria;Chlorine compounds;Degradation;Ecology;Nitrification;Sodium nitrate;Temperature;Toxicity;Bacterial strains;Degradation rate;Development and applications;Effects of temperature;High-efficiency;Microbial sensor;Nitrifying bacteria;Toxicity detection;Nitrogen compounds
摘要：
<jats:title>Abstract</jats:title>
<jats:p>This paper described the development and application of a nitrifying bacteria sensor to monitor water toxicity. Four strains of bacteria with high efficiency nitrification, designated as F1, F4, Y2 and Z1, were isolated from fish pond sediment, and identified as <jats:italic>Rhodococcus</jats:italic> sp. (F1 and F4), <jats:italic>Pseudomonas</jats:italic> sp. (Y2) and <jats:italic>Micrococcus</jats:italic> sp. (Z1). The four bacterial strains were tested for their nitrifying capabilities. The results showed that the nitrifying rate of F1, F4, Y2 and Z1 reached 3.51, 3.43, 3.46, 3.52 mg/L·d respectively. The four strains were further cultivated for 21 days to investigate the effects of temperature, pH and inoculation amount on their NH<jats:sub>4</jats:sub>
<jats:sup>+</jats:sup>-N degradation ability. The cultivation showed that the four strains possessed optimal NH<jats:sub>4</jats:sub>
<jats:sup>+</jats:sup>-N degradation rate when temperature was 35?, pH value was 8.5, and inoculation amount was 30%. Furthermore, the carrier optimization test demonstrated that the nitrobacteria film prepared using 16% PVA, 1.2% SA, 2% NaNO<jats:sub>3</jats:sub> and 75% CaCl<jats:sub>2</jats:sub> had the best performance of toxicity detection. These results suggested that the nitrobacteria biosensor designed in this study was sensible and suitable for detecting water toxicity.</jats:p>
