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Modified nano zero-valent iron reduce toxicity of polystyrene microplastics to ryegrass (Lolium Perenne L.)

Chemosphere 2023年 337卷 139152页

作者： Wei Zhou Danlian Huang Sha Chen Li Du Guangfu Wang Ruijin Li Wenbo Xu College of Environmental Science and Engineering Hunan University Changsha 410082 PR China Key Laboratory of Environmental Biology and Pollution Control Hunan University Ministry of Education Changsha 410082 PR China. Key Laboratory of Environmental Biology and Pollution Control Hunan University Ministry of Education Changsha 410082 PR China. Electronic address: huangdanlian@***. Hubei Provincial Key Laboratory of Green Materials for Light Industry Hubei University of Technology Wuhan 430068 PR China.

Microplastics pollution in environments has become a major concern and it has been proven to have adverse impacts on plants, so there is an urgent to find approaches to alleviate the detrimental effects of microplastics. In our study, we investigated the influence of polystyrene microplastics (PSMPs) on the growth, photosynthesis, and oxidative defense system changes of ryegrass, as well as the behavior of MPs at roots. Then three types of nanomaterials were applied to alleviate the adverse impact of PSMPs on ryegrass, which were nano zero-valent iron (nZVI), carboxymethylcellulose-modified-nZVI (C-nZVI) and sulfidated nZVI (S-nZVI), respectively. Our results suggested that PSMPs had significant toxicity to ryegrass, leading to decrease of shoot weight, shoot length and root length. Three nanomaterials regained the weight of ryegrass to a varying extent and made more PSMPs aggregate near roots. In addition, C-nZVI and S-nZVI facilitated the entrance of PSMPs into the root and promoted the chlorophyll a and chlorophyll b contents in leaves. Analysis of antioxidant enzymes and malondialdehyde content indicated that ryegrass coped well with the internalization of PSMPs, and all three types of nZVI could alleviate PSMPs-stress in ryegrass. This study elaborates the toxicity of MPs on plants and provides a novel insight into the fixing of MPs by plants and nanomaterials in environments, which needs to be further explored in future research.

关键词： Internalization Nano zero-valent iron Phytotoxicity Polystyrene microplastics Ryegrass

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Correction: Lysogenic bacteriophages encoding arsenic resistance determinants promote bacterial community adaptation to arsenic toxicity

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The ISME journal 2023年第7期17卷 1142页

作者： Xiang Tang Linrui Zhong Lin Tang Changzheng Fan Baowei Zhang Mier Wang Haoran Dong Chengyun Zhou Christopher Rensing Shungui Zhou Guangming Zeng 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. Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and Environment Fujian Agriculture and Forestry University Fuzhou 350002 PR China. 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. fancz@***. 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. zgming@***.

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Security Utilization Pattern For "Production While Remediating" In Cd-Contaminated Paddy Soils:Assembly And key Roles of Rhizosphere Microbial Community

SSRN

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SSRN 2023年

作者： Gu, Jiguang Guo, Fang Lin, Lihong Zhang, Jiexiang Sun, Weimin Muhammad, Riaz Liang, Haojie Duan, Dengle Lin, Zheng Wang, Yifan Zhong, Yuming Xu, Zhimin Deng, Xingying Department of Ecology Jinan University Guangzhou510632 China College of Resources and Environment Innovative Institute for Plant Health Zhongkai University of Agriculture and Engineering Guangzhou510225 China Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management Institute of Eco-environmental and Soil Sciences Guangdong Academy of Sciences Guangzhou510650 China Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria Nankai University Tianjin300350 China GRG Metrology and Test Group Co. Ltd. Guangzhou510656 China Guangdong Provincial Key Laboratory of Lingnan Specialty Food Science and Technology Zhongkai University of Agriculture and Engineering Guangzhou510225 China Graduate School of Agricultural and Life Sciences The University of Tokyo Bunkyo-ku Tokyo113-8657 Japan South China Agricultural University China

Security utilization measures (SUMs) for "production while remediating" in moderate and mild Cd-polluted paddy field had been widely used. A field experiment was conducted to investigate the driving mechanisms of the SUMs on the rhizosphere soil microbial communities and their roles in reducing the soil Cd bioavailability through soil biochemical analysis and 16S rDNA high-throughput sequencing. Results showed that the SUMs significantly increased rice yield by augmenting the number of effective panicles and filled grains, and inhibited soil acidification and enhanced disease resistance by enhancing soil enzyme activities. The SUMs significantly reduced the Cd accumulation in rice grains to meet food safety standards and promoted the conversion of exchangeable Cd and carbonate-bound Cd to Fe-Me oxidized Cd, organic-bound Cd and residual Cd in rhizosphere soil. These partly were due to the higher aromatization degree of soil DOM, which enhanced its complexing effect on soil Cd (DOM-Cd2+ complex). The fluorescence index of DOM revealed that microbial activity was the primary source of soil DOM, and its decomposition intensity directly affected the structure of DOM. The SUMs significantly increased the diversity of soil microbial communities and recruited many microbes (Arthrobacter, Candidatus_Solibacter, Bryobacter, Bradyrhizobium, and Flavisolibacter) related to organic matter decomposition, plant growth promotion, and pathogen inhibition in the rhizosphere soil. In particular, special taxa involved in sulfate/sulfur ion generation and nitrate/nitrite reduction pathway were observably enriched, which effectively reduced the soil Cd bioavailability through adsorption and co-precipitation. Therefore, the SUMs not only changed the soil physicochemical properties (e.g., soil pH), but also drove the rhizosphere microbial communities to reshape and participate in the chemical species transformation of soil Cd, thus reducing Cd accumulation in rice grains. © 2023, The Auth

关键词： Soils

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The study of migration velocity of Cs-135 and Se-79 in intact rock 2

The study of migration velocity of Cs-135 and Se-79 in intac...

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2019 2nd International Conference on Manufacturing technology, Materials and Chemical Engineering, MTMCE 2019

作者： Ling, H. Chen, L. Chen, W.M. Yun, L. Beijing Research Institute of Uranium Geology CNNC Beijing100029 China Hunan Provincial Key Laboratory of Pollution Control and Resources Technology University of South China Hengyang421001 China

The migration characteristics of highly mobile nuclides in natural barrier are the key concerns in the long-term safety assessment of geological disposal facilities. This paper focused on typical granite in Beishan area for geological disposal of high-level radioactive waste, and established a computational model for the release and migrate of nuclides after closure of repository by GoldSim. The migration characteristics of Cs-135 and Se-79 were analyzed by Monte Carlo stochastic simulation. The results show that the migration characteristics of Cs-135 and Se-79 in intact rock are direct influenced by hydraulic conductivity and hydraulic gradient, the migration velocity are 2.47×10-4m/a and 9.61×10-4m/a when the hydraulic conductivity correspond to 5.74 ×10-9 m/s. The analysis of the results shows that the migration characteristics can provide feedback guidance for the site selection and design of the disposal repository. © Published under licence by IOP Publishing Ltd.

关键词： Stochastic systems

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Cadmium immobilization in river sediments using nano-chlorapatite modified biochars: Effects on prokaryotic communities

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Journal of Environmental Management 2025年 389卷

作者： Yuan, Qiusheng Wang, Peifang Wang, Xun Hu, Bin Wang, Chao Xing, Xiaolei Huang, Rong Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes Ministry of Education College of Environment Hohai University Jiangsu Nanjing 210098 China Yunnan Provincial Key Laboratory of Carbon Sequestration and Pollution Control in Soils Faculty of Environmental Science and Engineering Kunming University of Science and Technology Yunnan Kunming 650500 China

In the face of worsening cadmium (Cd) pollution in river sediments, nano-chlorapatite (nClAP) modified biochars exhibit significant immobilization potential, but little is known about the ecological response of prokaryotic communities after remediation. In this study, nClAP-modified biochars derived from rice and wheat husk residues were used to immobilize Cd and evaluate their effects on α-diversity, co-occurrence network, and Cd-resistant genes of prokaryotic communities. Results revealed that pristine biochars converted exchangeable Cd to oxidizable and residual states via complexation, ion-exchange, and precipitation, while nClAP-modified biochars further facilitated the precipitation of Cd5(PO4)3Cl, Cd3(PO4)2, and Cd4P2O9. Consequently, the concentrations of Cd associated with toxicity characteristic leaching procedure (TCLP), physiologically based extraction test (PBET), overlying water, and pore water notably decreased, indicating a substantial reduction in Cd mobility and bio-accessibility. Benefiting from effective Cd stabilization and abundant nutrient inputs including carbon and phosphorus, the prokaryotic Species richness and Shannon diversity increased from 5762 to 6064–6443 and from 7.36 to 7.37–7.51, respectively. Furthermore, co-occurrence network analysis highlighted the keystone species responsible for nutrient cycling and Cd resistance. Prediction of Cd-resistance genes suggested that the abundance of Cd efflux genes (czcABCD) and Cd binding genes (dsbAB) decreased, attributing to the alleviated Cd toxic stress on prokaryotic cells after remediation. This study emphasizes the exceptional immobilization efficiency of nClAP-modified biochars and demonstrates their remarkable ecological benefits for microbes.

关键词： Biochar Cadmium Nano-chlorapatite Prokaryote Sediment

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Spatiotemporal Distribution of Microplastics in the Ganjiang River (Ganzhou Section): Insight into the Source Area Impact

SSRN

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SSRN 2022年

作者： Qin, Xinxin Sun, Nan Teng, Wenxi Zhu, Yichun Liu, Zuwen Li, Wentao Dong, Huiyu Qiang, Zhimin Zeng, Jinfeng Lian, Junfeng Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control Jiangxi University of Science and Technology 1958 Ke-jia Road Ganzhou341000 China Ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and Technology 1958 Ke-jia Road Ganzhou341000 China School of Life Sciences Jinggangshan University Ji’an343009 China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences 18 Shuang-qing Road Beijing100085 China Hydrology and Water Resources Monitoring Center for Ganjiang Upstream Watershed 8 Zhang-jia-wei Road Ganzhou341000 China

The accumulation of microplastic (MP) pollution in rivers has become a global concern;however, the underlying mechanism for spatiotemporal effects on MPs remains unclear. This study investigated the Ganjiang River source area with a field survey and found relatively low MP abundances in the target rivers (3.47 ± 0.95 items/L) owing to the small background in the riverine source area. The average MP abundance in the dry season (10.9 ± 2.33 items/L) was higher than that in the middle wet season (3.47 ± 0.95 items/L), and small MPs were prone to scouring from land. Within the predominant MP shape (fiber and fragment), size (0.125–0.5 mm), and colour (polychrome and white) distribution, the contribution of functional areas was as follows: industrial > scenic > residential > natural area. MP abundances fluctuated with different rainfall levels in the wet season, while during the period when the river flow was manually regulated, a good linear relationship was observed between river flow and MP abundance, suggesting that land scouring and transportation may play a more important role than other factors. The upper river regions predominated in the group in which the average MP abundance in the dry season was higher than that in the wet season. The small watershed area in the upstream region would lead to a low terrestrial MP number, making it easy for MP content in rivers to reach a platform. This work contributes to the understanding of MP distribution in freshwater and provides a potential guideline for MP control. © 2022, The Authors. All rights reserved.

关键词： Microplastic

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Modeling and process design of municipal solid waste pyrolysis and gasification with a fixed-bed chamber 5

Modeling and process design of municipal solid waste pyrolys...

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2019 5th International Conference on Energy, Environment and Materials Science, ICEEMS 2019

作者： Erping, Li Qing, Hu Haoyun, Chen Jinling, Cai Yaqun, Qiu Zhiyuan, Yu Hunan Research Academy of Environmental Sciences Hunan Provincial Key Laboratory of Water Pollution Control Technology Changsha Hunan410002 China Central South University of Forestry and Technology Changsha Hunan410004 China

To design the process of municipal solid waste (MSW) pyrolysis and gasification in a fixed-bed more veritably and effectively, the modeling of this process was proposed based on Gibbs energy minimization by using the Aspen plus software. The proposed model was used to predict and analyze the influences of operating parameters including gasification temperature, air-fuel ratio and steam/MSW ratio on the composition, lower heating value (LHV), carbon conversion efficiency (CCE), heat conversion efficiency (HCE)and flammable gas contents (FGC) of syngas. The results indicate that there is a good agreement between the experimental data and the simulated data obtained using this model. The predicted appropriate gasification temperature was around 900°C while the suitable air-fuel ratio was approximately 0.4, and the beast steam/MSW ratio was around 0.4. A novel configuration of atmospheric fixed-bed chamber is designed for the municipal solid waste pyrolysis and gasification process based on the experimental and simulated results. The designed configuration was feasible with achieved heat balance of the system. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Computer software

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Surfactant-functionalized fly ash from waste into wealth: Collaboratively scavenge of heavy metals and antibiotics from multi-pollutant wastewater

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Separation and Purification technology 2025年 375卷

作者： Hanghang Zhao Wenquan Cui Yishan Yang Shaohua Li Fengmin Song Meng Wang Xianzhao Shao Xing Xu School of Chemical and Environment Science Shaanxi University of Technology Hanzhong 723001 Shaanxi China College of Natural Resources and Environment Northwest A&F University Yangling 712100 China Key Laboratory of Green and High-end Utilization of Salt Lake Resources Qinghai Institute of Salt Lakes Chinese Academy of Sciences China Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes China Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao 266237 China

The co-contamination of aquatic environments by heavy metals and antibiotics poses a pressing threat to ecological integrity and human health, necessitating the development of efficient, scalable remediation technologies. In this study, sophorolipid (SLs)-modified acidified fly ash adsorbent (MSFA), engineered for the simultaneous removal of metal ions (cadmium (Cd 2+ ), lead (Pb 2+ )) and antibiotics (ciprofloxacin (CIP), ciprofloxacin (CIP)) from aqueous systems was investigated. The results indicated that the optimal preparation conditions: solution pH was 9, SLs concentration was 40 mg/L, reaction temperature was 60 °C, and response time was 6 h, yielded the highest total pollutant removal (138 mg/g), with adsorption capacities following the order Pb 2+ >Cd 2+ > TC > CIP. Kinetic analyses demonstrated that the metal ions adsorption followed pseudo-second-order kinetic model, while antibiotic removal conformed to the Elovich model. Isotherm fitting showed that Cd 2+ and CIP adsorption aligned with the Freundlich model, whereas Pb 2+ and TC followed the Langmuir and Temkin models, respectively. Among environmental variables, solution pH exerted the most significant influence on removal performance. Mechanistic investigations indicated that adsorption was governed by complexation, precipitation, π–π interactions, and cation–bridging between metal–antibiotic complexes and MSFA-15 surface functional groups. Reusability assessments demonstrated that MSFA-15 retained high adsorption efficiency over multiple cycles, with particularly strong performance in livestock wastewater. This work highlights the practical potential of MSFA-15 as a low-cost, sustainable adsorbent for mitigating multifaceted water pollution.

关键词： River pollution

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Recent selection and introgression facilitated high-altitude adaptation in cattle

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Science Bulletin 2024年第21期69卷 3415-3424页

作者： Yang Lyu Fuwen Wang Haijian Cheng Jing Han Ruihua Dang Xiaoting Xia Hui Wang Jincheng Zhong Johannes A.Lenstra Hucai Zhang Jianlin Han David E.MacHugh Ivica Medugorac Maulik Upadhyay Alexander SLeonard He Ding Xiaorui Yang Ming-Shan Wang Suolang Quji Basang Zhuzha Pubu Quzhen Silang Wangmu Nima Cangjue Da Wa Weidong Ma Jianyong Liu Jicai Zhang Bizhi Huang Xingshan Qi Fuqiang Li Yongzhen Huang Yun Ma Yu Wang Yuanpeng Gao Wenfa Lu Chuzhao Lei Ningbo Chen Key Laboratory of Animal Genetics Breeding and Reproduction of Shaanxi ProvinceCollege of Animal Science and TechnologyNorthwest A&F UniversityYangling 712100China Key Laboratory of Animal Production Product Qualityand SecurityMinistry of EducationCollege of Animal Science and TechnologyJilin Agricultural UniversityChangchun 130118China Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural SciencesShandong Key Lab of Animal Disease Control and BreedingJinan 250000China College of Veterinary Medicine Northwest A&F UniversityYangling 712100China Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Sichuan Province and Ministry of EducationSouthwest Minzu UniversityChengdu 610000China Faculty of Veterinary Medicine Utrecht UniversityUtrecht 3584 CMThe Netherlands Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental ScienceYunnan UniversityKunming 650500China Southwest United Graduate School Kunming 650500China Yazhouwan National Laboratory Sanya 572024China CAAS-ILRI Joint Laboratory on Livestock and Forage Genetic Resources Institute of Animal ScienceChinese Academy of Agriculture Sciences(CAAS)Beijing 100000China Animal Genomics Laboratory UCD School of Agriculture and Food ScienceUniversity College DublinDublin D04 V1W8Ireland UCD Conway Institute of Biomolecular and Biomedical Research University College DublinDublin D04 V1W8Ireland Population Genomics Group Department of Veterinary SciencesLMU MunichMartinsried 82152Germany Animal Genomics ETH ZurichUniversitaetstrasse 2Zurich 8006Switzerland State Key Laboratory of Genetic Resources and Evolution Yunnan Laboratory of Molecular Biology of Domestic AnimalsKunming Institute of ZoologyChinese Academy of SciencesKunming 650223China Institute of Animal Husbandry and Veterinary Science Xizang Autonomous Region Academy of Agricultural and Animal Husbandry SciencesLhasa 850000China Shigatse City Kan

During the past 3000 years,cattle on the Qinghai-Xizang Plateau have developed adaptive phenotypes under the selective pressure of hypoxia,ultraviolet(UV)radiation,and extreme *** genetic mechanism underlying this rapid adaptation is not yet well ***,we present whole-genome resequencing data for 258 cattle from 32 cattle breeds/populations,including 89 Tibetan cattle representing eight populations distributed at altitudes ranging from 3400 m to 4300 *** genomic analysis revealed that Tibetan cattle exhibited a continuous phylogeographic cline from the East Asian taurine to the South Asian indicine *** found that recently selected genes in Tibetan cattle were related to body size(HMGA2 and NCAPG)and energy expenditure(DUOXA2).We identiﬁed signals of sympatric introgression from yak into Tibetan cattle at different altitudes,covering 0.64%–3.26%of their genomes,which included introgressed genes responsible for hypoxia response(EGLN1),cold adaptation(LRP11),DNA damage repair(LATS1),and UV radiation resistance(GNPAT).We observed that introgressed yak alleles were associated with noncoding variants,including those in present *** Tibetan cattle,three yak introgressed SNPs in the EGLN1 promoter region reduced the expression of EGLN1,suggesting that these genomic variants enhance hypoxia *** together,our results indicated complex adaptation processes in Tibetan cattle,where recently selected genes and introgressed yak alleles jointly facilitated rapid adaptation to high-altitude environments.

关键词： Tibetan cattle Introgression High-altitude adaptation Noncoding variant Cis-regulation

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Role of Body Fluid on the Removal of Haloacetic Acids from Swimming Pool Water by Nanofiltration

SSRN

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SSRN 2023年

作者： Yang, Linyan Jiang, Jielun Chen, Xueming Zhou, Yanbo Bai, Lichun Meng, Shujuan Cao, Guomin National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery East China University of Science and Technology Shanghai200237 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology College of Environment and Resources Fuzhou University Fujian Fuzhou350116 China Key Laboratory of Traffic Safety on Track Ministry of Education School of Traffic & Transportation Engineering Central South University Changsha410075 China School of Space and Environment Beihang University Beijing100191 China

Considering the presence of both body fluids and haloacetic acids (HAAs) in swimming pool waters (SPWs), as well as the potential for interaction among these substances and membranes, we have initiated a systematic investigation into the impact of body fluid analogue (BFA) on membrane performance. The minor impact of BFA on the rejection behavior of NF90 was attributed to its dominant effect of size exclusion. However, for NF270, 30 mg/L BFA increased water flux by 5%, decreased NaCl rejection from 59% to 47%, and decreased HAA rejection from 88% to 75%. The carboxyl-based components, including citric acid (CA) and hippuric acid (HA), were mainly responsible for the varied performance. Carboxyl-based components reduced the negative charge on membrane surfaces, increased the effective pore size and hydrophilicity, resulting in an increase in water flux and a decrease in NaCl and HAA rejection. The amine-based components (other BFA components with CA, HA, and salt excluded) did not directly influence the membrane performance, but their effect became remarkable under the coexistence of carboxyl-based components. The amine-based components neutralized the effect of the carboxyl-based components by forming hydrogen bonds. The practical applications of membrane technologies for water purification can be better predicted by the underlying mechanism for resolving the interaction between polyamide membranes, organic substances, and trace contaminants. © 2023, The Authors. All rights reserved.

关键词： Body fluids

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