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Removal of ciprofloxacin by biosulfurized nano zero-valent iron (BP–S-nZVI) activated peroxomonosulfate: Influencing factors and degradation mechanism

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Chemosphere 2024年 362卷 142557页

作者： Peng, Zheng Xi, Yanni Zhang, Zhuang Su, Zhu Xu, Weihua Zhang, Chang Li, Xin College of Environmental Science and Engineering Hunan University ChangSha410082 China Ministry of Education Changsha410082 China Hunan Provincial Key Laboratory of Water Pollution Control Technology Hunan Research Academy of Environmental Sciences Changsha410014 China

Agglomeration and passivation restrict the using zero-valent iron nanoparticles (nZVI). Enhancing the reactivity of nZVI is often accomplished by sulfurization. In this work, nZVI was sulfurized using SRB to produce biosulfurized nano zero-valent iron (BP–S-nZVI), which was then utilized as a catalyst to investigating its performance in an advanced oxidation process based on activated peroxomonosulfate (PMS). When the S/Fe was 0.05, 0.4 g/L of catalyst and 0.5 mM PMS were added to a 20 mg/L ciprofloxacin solution. In 120 min, a 90.4% clearance rate was reached. When the initial pH of the solution was within the range of 3–11, all exhibited acceptable degradation performance and were minimally affected by co-existing anions. In this activation system, hydroxyl, superoxide and sulfate radicals (•OH, O2•− and SO4•−, respectively) have been proven to be the main active species. Seven intermediates in the degradation process of CIP were identified by LC-MS analysis and two possible degradation pathways were proposed. In addition, the degradation rate of CIP was still able to reach 87.0% after five cycles, and the removal rate remained unchanged in the CIP solution with actual water samples as background. This study demonstrated that BP-S-nZVI as a catalyst for the activation of PMS for CIP degradation can still show good reactivity, which provides more possibilities for the practical application of BP-S-nZVI in the degradation of pollutants. © 2024 Elsevier Ltd

关键词： Degradation

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Magnetic bentonite with organic modification highly efficient for adsorption of Ce(III) and Y(III)

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Journal of Molecular Liquids 2024年 415卷

作者： Liu, Li Feng, Bo Wu, Jiyun Gu, Qixiong Jiangxi Provincial Key Laboratory of Environmental Pollution Prevention and Control in Mining and Metallurgy Ganzhou341000 China School of Resources and Environment Engineering Jiangxi University of Science and Technology Ganzhou341000 China

A simple organic magnetic adsorbent (PAA-MBent) was synthesized using 2-hydroxyphosphonylacetic acid and applied to the adsorption of Ce(III) and Y(III). It was confirmed that the phosphoryl groups could effectively regulate the homogeneous loading of magnetic particles on the bentonite during the synthesis process, and the hydroxyl and phosphoryl groups can be sufficiently used on the surface of bentonite to increase the abundance of adsorption sites, which have favorable coordination with Ce(III) and Y(III). The experimental results showed that the maximal adsorption capacity was increased to 99.11 mg/g and 65.65 mg/g for Ce(III) and Y(III), respectively, which was 2.52 and 2.91 times higher than magnetic bentonite. The adsorption behavior conformed to the Langmuir isothermal adsorption model and the pseudo-second-order kinetic model, and the adsorption of Ce(III) by PAA-MBent performed better than that of Y(III). The adsorption efficiency was affected by ionic strength and site inhibition of coexisting cations, and its adsorption selectivity was mainly disturbed by the competition of Al ions. The results after adsorption identified the key adsorption mechanisms as ion exchange, electrostatic attraction, functional group complexation, and hole filling. After five cycles, the adsorbent still exhibited good adsorption and magnetic recovery performance. These results reveal that PAA-MBent is promised to be a novel, inexpensive and effective adsorbent for the removal of Ce(III) and Y(III) from contaminated water. © 2024

关键词： Metal ions

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Rapid humification of cotton stalk catalyzed by coal fly ash and its excellent cadmium passivation performance

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Environmental Science and pollution Research 2024年第39期31卷 52582-52595页

作者： Zhou, Hao Dang, Yan Chen, Xinyu Ivanets, Andrei Ratko, Alexander A. Kouznetsova, Tatyana Liu, Yongqi Yang, Bo Zhang, Xulong Sun, Yiwei He, Xiaoyan Ren, Yanjie Su, Xintai School of Environment and Energy Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling South China University of Technology Guangdong Guangzhou510006 China State Scientific Institution "Institute of General and Inorganic Chemistry of National Academy of Sciences of Belarus" Minsk220072 Belarus China Customs Science and Technology Research Center Beijing100026 China Xinjiang Key Laboratory of Clean Conversion and High Value Utilization of Biomass Resources School of Chemistry and Environmental Sciences Yili Normal University Yining Xinjiang835000 China Xinjiang Qinghua Energy Group Co. Ltd Yining Xinjiang844500 China

Due to industrialization, soil heavy metal pollution is a growing concern, with humic substances (HS) playing a pivotal role in soil passivation. To address the long duration of the compost humification problem, coal fly ash (CFA) in situ catalyzes the rapid pyrolysis of the cotton stalk (CS) to produce HS to address Cd passivation. Results indicate that the highest yield of humic acid (HA) (8.42%) and fulvic acid (FA) (1.36%) is obtained when the CS to CFA mass ratio is 1:0.5, at 275 ℃ for 120 min. Further study reveals that CFA catalysis CS humification, through the creation of alkaline pyrolysis conditions, Fe2O3 can stimulate the protein and the decomposition of hemicellulose in CS, and then, through the Maillard and Sugar-amine condensation reaction synthesis HA and FA. Applying HS-CS&CFA in Cd-contaminated soil demonstrates a 26.69% reduction in exchangeable Cd within 30 days by chemical complexation. Excellent maize growth effects and environmental benefits of HS products are the prerequisites for subsequent engineering applications. Similar industrial solid wastes, such as steel slag and red mud, rich in Fe2O3, can be explored to identify their catalytic humification effect. It could provide a novel and effective way for industrial solid wastes to be recycled for biomass humification and widely applied in remediating Cd-contaminated agricultural soil. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Slags

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Ferrate(Ⅵ) Oxidative Degradation of Capecitabine in Aquatic Matrices: Degradation Performance, Mechanisms, and Toxicity Assessment

SSRN

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SSRN 2024年

作者： Chen, Jing Yao, Binbin Lu, Yin Wu, Kai Ji, Yuefei Lu, Junhe Zhu, Feng Li, Anna Ma, Lan Li, Wenlong Department of Environmental Science and Engineering Nanjing Agricultural University Nanjing210095 China Jiangsu Provincial Center for Disease Control and Prevention Nanjing210023 China State Key Laboratory of Pollution Control and Resources Reuse Nanjing210023 China

The growing utilization of anticancer drugs in recent years has resulted in their presence in surface water and sewage, which could have ecological consequences. In this work, ferrate (Fe(VI)) was utilized to oxidize capecitabine (CAP), a frequently used anticancer drug that has gained attention lately. The experiments have demonstrated that Fe(VI) was quite reactive with CAP at pH 7, achieving a reaction rate of 102.75 M-1 s-1. The addition of humic acid (0.1~10 mg/L) significantly inhibited the oxidation process. Then, four reaction pathways, mainly including hydroxyl substitution, direct oxidation and cleavage of C-O and C-N bond were proposed based on twelve products detected by LC-MS. These pathways were further validated by theoretical calculations. Experiments conducted in water matrices assessed the applicability of Fe(VI) technology. Toxicity assessments of CAP and its intermediates were performed using the T.E.S.T program, and predictions indicated that the intermediates were generally less toxic than CAP. Overall, this work revealed that Fe(VI) has great potential to solve the environmental pollution problems associated with capecitabine in water. © 2024, The Authors. All rights reserved.

关键词： Sewage

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Construction of coal pitch-based HA-K grafted poly condensates and their excellent anti-temperature and viscosity-reducing properties

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Petroleum Science 2024年第4期21卷 2806-2816页

作者： Jing Tan Wei Zhang Xiu-Ling Yan Hao Zhou Sher Bahadar Khan Seitkhan Azat Shi-You Yan Hao-Jie Ma Xin-Tai Su Xinjiang Key Laboratory of Clean Conversion and High Value Utilization of Biomass Resources College of Chemistry and Chemical EngineeringYili Normal UniversityYining835000XinjiangChina School of Environment and Energy Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and RecyclingSouth China University of TechnologyGuangzhou510006GuangdongChina Drilling Fluid Branch of CNPC Xibu Drilling Engineering Company Limited Karamay830046XinjiangChina Urumchi Huatailong Chemical Additives Co. Ltd.Urumqi830000XinjiangChina Department of Chemistry Faculty of ScienceKing Abdulaziz UniversityPO Box 80203Jeddah21589Saudi Arabia Faculty of Chemistry and Chemical Technology Al-Farabi Kazakh National UniversityAlmaty050013Kazakhstan

Humic acids(HAs)are widely used as filtrate and viscosity reducers in drilling ***,their practical utility is limited due to poor stability in salt resistance and high-temperature *** coal pitch(CP)is a by-product from coal pyrolysis above 650℃.The substance's molecular structure is characterized by a dense arrangement of aromatic hydrocarbon and alkyl *** unique structure gives it unique chemical properties and excellent drilling performance,surpassing traditional humic acids in drilling *** humate is prepared from CP(CP-HA-K)by thermal catalysis.A new type of high-quality humic acid temperature-resistant viscosity-reducer(Graft CP-HA-K polymer)is synthesized with CP-HA-K,hydrolyzed polyacrylonitrile sodium salt(Na-HPAN),urea,formaldehyde,phenol and acrylamide(AAM)as raw *** experimental results demonstrate that the most favorable conditions for the catalytic preparation of CP-HA-K are 1 wt%catalyst dosage,30 wt%KOH dosage,a reaction temperature of 250℃,and a reaction time of 2 h,resulting in a maximum yield of CP-HA-K of 39.58%.The temperature resistance of the Graft CP-HA-K polymer is measured to be 177.39℃,which is 55.39℃ higher than that of commercial *** is due to the abundant presence of amide,hydroxyl,and amine functional groups in the Graft CP-HA-K polymer,which increase the length of the carbon chains,enhance the electrostatic repulsion on the surface of solid *** being aged to 120℃ for a specified duration,the Graft CP-HA-K polymer demonstrates significantly higher viscosity reduction(42.12%)compared to commercial HA-K(C-HA-K).Furthermore,the Graft CP-HA-K polymer can tolerate a high salt concentration of 8000 mg.L-1,measured after the addition of optimum amount of 3 wt%Graft CP-HA-K *** action mechanism of Graft CP-HA-K polymer on high-temperature drilling fluid is that the Graft CP-HA-K polymer can increase the repulsive force between solid particles and

关键词： Viscosity breaker Heat resistance Base mud Graft CP-HA-K polymer CP Salt resistance

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Activation of Peracetic Acid by Thermally Modified Carbon Nanotubes: Organic Radicals Contribution and Active Sites Identification

SSRN

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SSRN 2023年

作者： Shen, Wuziyue Yang, Libin Zhou, Zhe Gao, Haiping Zhou, Xuefei Zhang, Yalei Chen, Jiabin State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China State Key Laboratory of Marine Geology Tongji University Shanghai200092 China Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Shandong Qingdao266237 China

Carbon materials activated peracetic acid (PAA) as an environmentally friendly technology has attracted wide attention for pollutants degradation. In this work, thermally modified carbon nanotubes (CNT-t) were applied to efficiently activate PAA for phenol (PE) degradation. The identification of active sites involved in PAA activation and the contributions of different reactive radicals to the PE degradation were systematically investigated. Excellent removal efficiency of PE was obtained in the CNT−800/PAA system within 30 min at neutral conditions. Electron paramagnetic resonance (EPR) technique and radical quenching studies confirmed that organic radicals were the dominant reactive oxygen species (ROS) in the reaction process, while •OH made limited contribution to PE degradation. The material characterization proved that the lattice defects rate of CNT is positively correlated with the catalytic activity. The adsorption models verified that the double-vacancy defects (CNTs-DV) played a major role on the adsorption of PAA and activation process. In contrast to the influence of chlorine and carbonate ions, the PE degradation in CNT/PAA system was strongly affected by the initial pH and the presence of humic acid. Moreover, CNT-800 can still maintain good catalytic activity after five-cycle runs. Overall, this work not only provides valuable insights for the rational design and directional synthesis of high-performance nano-carbon catalysts, but also proposes a very meaningful oxidation system for wastewater treatment. © 2023, The Authors. All rights reserved.

关键词： Catalyst activity

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Molecular signatures of soil-derived dissolved organic matter constrained by mineral weathering

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Fundamental Research 2023年第3期3卷 377-383页

作者： Ying-Hui Wang Peng Zhang Chen He Jian-Chun Yu Quan Shi Randy A.Dahlgren Robert G.M.Spencer Zhi-Bing Yang Jun-Jian Wang State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan 430072China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Shanghai Engineering Research Center of Hadal Science and Technology College of Marine SciencesShanghai Ocean UniversityShanghai 201306China Department of Land Air and Water ResourcesUniversity of California DavisDavis 95616United States Department of Earth Ocean and Atmospheric ScienceFlorida State UniversityTallahassee 32306United States

Dissolved organic matter(DOM)in soils drives biogeochemical cycling and soil functions in different directions depending on its molecular ***,there is a distinct paucity of information concerning how the molecular signatures of soil DOM vary with different degrees of weathering across wide geographic ***,we resolved the DOM molecular signatures from 22 diverse Chinese reference soils and linked them with soil organic matter and weathering-related mineralogical *** mixed-effects models revealed that the yields of DOM were determined by soil organic carbon content,whereas the molecular signature of DOM was primarily constrained by the weathering-related *** soil weathering index showed a positive effect on the lability and a negative effect on the aromaticity of ***,DOM in highly weathered acidic soils featured more amino sugars,carbohydrates,and aliphatics,as well as less O-rich polyphenols and condensed aromatics,thereby conferring a higher DOM biolability and lower DOM *** study highlights the dominance of the weathering-related dimension in constraining the molecular signatures and potential functions of DOM in soils across a wide geographic scale.

关键词： Soil organic matter Dissolved organic matter Chemical composition Molecular signature Mineral weathering

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Bandgap engineering of tetragonal phase CuFeS_(2)quantum dots via mixed-valence single-atomic Ag decoration for synergistic Cr(VI)reduction and RhB degradation

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Chinese Chemical Letters 2021年第11期32卷 3450-3456页

作者： Yangzi Shangguan Yuanhao Zhou Renji Zheng Xuezhen Feng Qiuyue Ge Ranhao Wang Dazhong Yang Wenfei Wei Xiaoyong Wu Jia Lin Hong Chen Department of Physics Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric PowerShanghai University of Electric PowerShanghai 200090China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution ControlSchool of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Hubei Key Laboratory of Mineral Resources Processing and Environment School of Resources and Environmental EngineeringWuhan University of TechnologyWuhan 430070China

Bandgap engineering through single-atom site binding on semiconducting photocatalyst can boost the intrinsic activity,selectivity,carrier separation,and electron ***,we report a mixed-valence Ag(0)and Ag(I)single atoms co-decorated semiconducting chalcopyrite quantum dots(Ag/CuFeS_(2)QDs)*** demonstrates efficient photocatalytic performances for specific organic dye(rhodamine B,denoted as RhB)as well as inorganic dye(Cr(VI))removal in water under natural sunlight *** RhB degradation and Cr(VI)removal efficiencies by Ag/CuFeS_(2)QDs were 3.55 and 6.75 times higher than those of the naked CuFeS_(2)QDs at their optimal pH conditions,***,in a mixture of RhB and Cr(VI)solution under neutral condition,the removal ratio has been elevated from 30.2%to 79.4%for Cr(VI),and from 95.2%to 97.3%for RhB degradation by using Ag/CuFeS_(2)QDs after 2 h sunlight *** intrinsic mechanism for the photocatalytic performance improvement is attributed to the narrow bandgap of the single-atomic Ag(I)anchored CuFeS_(2)QDs,which engineers the electronic structure as well as expands the optical light response ***,the highly active Ag(0)/CuFeS_(2)and Ag(I)/CuFeS_(2)effectively improve the separation efficiency of the carriers,thus enhancing the photocatalytic *** work presents a highly efficient single atom/QDs photocatalyst,constructed through bandgap engineering via mixed-valence single noble metal atoms binding on semiconducting *** paves the way for developing high-efficiency single-atom photocatalysts for complex pollutions removal in dyeing wastewater environment.

关键词： Single-atom catalysts Bandgap engineering Cr(VI)reduction Organic pollutants degradation Dyeing wastewater treatment

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Lignocellulosic fraction-induced niche differentiation within dissimilatory iron reducing bacterial groups in a paddy soil

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Soil Ecology Letters 2024年第1期6卷 77-88页

作者： Yunbin Jiang Wenting Hu Kailou Liu Shangshu Huang Fengwu Zhou Cheng Han Huan Deng Wenhui Zhong Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control School of GeographyNanjing Normal UniversityNanjing 210023China Jiangsu Centerfor Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023China National Engineering and Technology Research Center for Red Soil Improvement Jiangxi Institute of Red Soil and Germplasm ResourcesNanchang 331717China Schoolof Environment Nanjing Normal UniversityNanjing 210023China

Responses of soil DIRB to lignocellulosic fractions during a 6-week microcosm incubation were ***,Bacillus,and Clostridium maintained their domi-nance throughout the *** DIRB groups proliferated under specific lignocellulosic fraction *** of insufficient ferric iron on the proliferation varied by DIRB *** iron reducing bacteria(DIRB)are phylogenetically and physi-ologically diverse in paddy soils,where iron reduction closely couples with the oxidation of rice straw-derived carbon in the straw returning ***,few studies have addressed the niche differentiation within DIRB groups during the degradation of lignocellulosic fractions of rice *** study conducted a 6-week microcosm incubation experiment to reveal the distinct responses of DIRB groups under specific lignocellulosic fraction amendments with and without ferrihydrite(Fh)addition in a flooded paddy *** showed that the total absolute abundance of the 19 detected DIRB groups did not vary significantly during the ***,Bacillus,and Clostridium were the dominant DIRB groups for all lignocellulosic treatments whereas Thermincola was dominant but only under xylan amendment with Fh ***-nodes in the co-occurrence networks of bacterial community mainly belonged to Anaeromyxobacter and *** and Thermincola,Alkaliphilus and Anaeromyxobacter,and Alicyclobacillus,Desulfobulbus,and Desulfosporosinus were specifically proliferated under xylan,cellulose,and lignin amendments,*** the proliferation was limited by insufficient ferric iron varied by bacterial *** findings suggested the lignocellulosic fraction-induced niche differentiation within DIRB groups,which advanced our understanding of the ecology of DIRB in paddy soils under straw returning.

关键词： cellulose hemicellulose lignin bacterial community diversity co-occurrence networks

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Dietary Enteromorpha polysaccharide-Zn supplementation regulates amino acid and fatty acid metabolism by improving the antioxidant activity in chicken

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Journal of Animal Science and Biotechnology 2022年第3期13卷 878-896页

作者： Teketay Wassie Xinyi Duan Chunyan Xie Ruxia Wang Xin Wu Key Laboratory of Agro-ecological Processes in Subtropical Region Institute of Subtropical AgricultureChinese Academy of SciencesNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionHunan Provincial Engineering Research Center for Healthy Livestock and Poultry ProductionChangsha 410125HunanChina College of Bioscience and Biotechnology Hunan Agricultural UniversityChangshaChina Institute of Biological Resources Jiangxi Academy of SciencesNanchang 330096China Tianjin Institute of Industrial Biotechnology Chinese Academy of SciencesTianjin 300308PR China

Background:Enteromorpha prolifera(***)polysaccharide has become a promising feed additive with a variety of physiological activities,such as anti-oxidant,anti-cancer,anti-diabetic,immunomodulatory,hypolipidemic,and cation chelating ***,whether Enteromorpha polysaccharide-trace element complex supplementation regulates amino acid and fatty acid metabolism in chicken is largely *** study was conducted to investigate the effects of *** polysaccharide(EP)-Zn supplementation on growth performance,amino acid,and fatty acid metabolism in ***:A total of 184 one-day-old Ross-308 broiler chickens were randomly divided into two treatment groups with 8 replicates,12 chickens per replicate,and fed either the basal diet(control group)or basal diet plus *** polysaccharide-Zinc(400 mg EP-Zn/kg diet).Results:Dietary EP-Zn supplementation significantly increased(P<0.05)the body weight,average daily gain,muscle antioxidant activity,serum HDL level,and reduced serum TG and LDL *** addition,dietary EPZn supplementation could modulate ileal amino acid digestibility and upregulate the mRNA expression of amino acid transporter genes in the jejunum,ileum,breast muscle,and liver tissues(P<0.05).Compared with the control group,breast meat from chickens fed EP-Zn had higher(P<0.05)Pro and Asp content,and lower(P<0.05)Val,Phe,Gly,and Cys free amino acid ***,EP-Zn supplementation upregulated(P<0.05)the mRNA expressions of mTOR and anti-oxidant related genes,while down-regulated protein degradation related genes in the breast *** meat from EP-Zn supplemented group had significantly lower(P<0.05)proportions ofΣn-3 PUFA,and a higher percentage ofΣn-6 PUFA and the ratio of n-6/n-3 ***,EP-Zn supplementation regulated lipid metabolism by inhibiting the gene expression of key enzymes involved in the fatty acid synthesis and activating genes that participated in fatty acid oxidation in the liver tiss

关键词： Amino acid metabolism Antioxidant Chicken Enteromorpha prolifera Lipid metabolism Oxidative stress

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