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Reforestation Substantially Changed Soil Antibiotic Resistome and Their Relationships with Metal Resistance Genes, Mobile Genetic Elements, and Pathogens

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SSRN 2023年

作者： Zhang, Song Li, Ting Hu, Jinming Li, Kexin Liu, Dong Li, Haixia Wang, Fang Chen, Danhong Zhang, Zejin Fan, Qiuping Cui, Xiaoyong Che, Rongxiao Institute of International Rivers and Eco-security Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security Yunnan University Kunming650500 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China Yunnan University China Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun130102 China School of Life Sciences Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments Yunnan University Kunming650091 China Faculty of Land Resource Engineering Kunming University of Science and Technology Kunming650093 China

Revealing the effects of reforestation on the soil antibiotic resistome is essential for assessing ecosystem health, yet related studies remain scarce. Here, to determine the responses of the soil antibiotic resistome to reforestation, 30 pairs of cropland and forest soil samples were collected from southwestern China, a region with high environmental heterogeneity. All the forests had been derived from croplands for more than a decade. The diversity and abundance of soil antibiotic resistance genes (ARGs), metal resistance genes (MRGs), mobile genetic elements (MGEs), and pathogens were determined by metagenomic sequencing and real-time PCR. The results showed that reforestation significantly increased soil microbial abundance and the contents of Cu, total carbon, total nitrogen, total organic carbon, and ammonium nitrogen. Nevertheless, it decreased the contents of soil Zn, Ba, nitrate nitrogen, and available phosphorus. The main soil ARGs identified in this region were vancomycin, multidrug, and bacitracin resistance genes. Reforestation significantly increased the soil ARG abundance (by 62.58%), while it decreased the ARG richness (by 16.50%). Reforestation exerted no significant effects on the abundance of heavy metal resistance genes and pathogens, but it doubled the abundance of MGEs. Additionally, reforestation substantially decreased the co-occurrence frequencies of ARGs with MRGs and pathogens. In contrast, the correlation between ARGs and MGEs was greatly enhanced by reforestation. Similarly, the correlations between soil ARG abundance and environmental factors were also strengthened by reforestation. These findings suggest that reforestation can substantially affect soil antibiotic resistome, which provides critical information for assessing the effects of large reforestation projects such as "grain for green" on soil health. © 2023, The Authors. All rights reserved.

关键词： Soils

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Polymer Chain Extenders Induce Significant Toxicity Through Daf-16 and Skn-1 Pathways in Caenorhabditis Elegans: A Comparative Analysis

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SSRN 2024年

作者： Mo, Aoyun Liang, Yuqing Cao, Xiaomu Jiang, Jie Liu, Yan Cao, Xuelong Qiu, Yuping He, Defu School of Ecological and Environmental Sciences Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste East China Normal University Shanghai200241 China Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration East China Normal University Shanghai200241 China East China Normal University Shanghai200241 China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area Ministry of Natural Resources Shanghai200062 China

Polymer chain extenders, commonly used in plastic production, have garnered increasing attention due to their potential environmental impacts. However, a comprehensive understanding of their ecological risks remains largely unknown. In this study, we employed the model organism Caenorhabditis elegans to investigate toxicological profiles of ten commonly-used chain extenders. Exposure to environmentally relevant concentrations of these chain extenders (ranging from 0.1 µg L-1 to 10 mg L-1) caused significant variations in toxicity. Lethality assays demonstrated the LC50 values ranged from 92.42 µg L-1 to 1553.65 mg L-1, indicating marked differences in acute toxicity. Sublethal exposures could inhibit nematodes’ growth, shorten lifespan, and induce locomotor deficits, neuronal damage, and reproductive toxicity. Molecular analyses further elucidated the involvement of the DAF-16 and SKN-1 signaling pathways, as evidenced by upregulated expression of genes including ctl-1,2,3, sod-3, gcs-1, and gst-4. It implicates these pathways in mediating oxidative stress and toxicities induced by chain extenders. Particularly, hexamethylene diisocyanate and diallyl maleate exhibited markedly high toxicity among the chain extenders, as revealed through a comparative analysis of multiple endpoints. These findings demonstrate the remarkable ecotoxicological risks of polymer chain extenders, and suggest the need for more rigorous environmental safety assessments. © 2024, The Authors. All rights reserved.

关键词： Toxicity

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Validation and Application of Diffusive Gradient in Thin-Film (Dgt) Equipped Novel Cyclodextrin Polymer Gels for Monitoring Endocrine Disrupting Chemicals (Edcs) and Environmental Risk Assessment in the Taihu Lake Basin

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SSRN 2022年

作者： Zhu, Xingqi Jiang, Lu Wang, Yinfeng Ji, Xiaowen Zhang, Delin Xu, Guizhou Wu, Daise Li, Aimin Xie, Xianchuan Key Laboratory of Poyang Lake Environment and Resource Utilization Ministry of Education School of Resources Environmental & Chemical Engineering Nanchang University Nanchang330031 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing China Jiangxi Nanxin Environmental Protection Technology Co. LTD Jiangxi Province Jiujiang330300 China Nanjing Medical University China

Taihu Lake is the most important drinking water source of the major cities in the Yangtze River Delta. The pollution of endocrine disruptors (EDCs)in Taihu Lake has been increasing recently, the accurate determination is an important guide for predicting its health risks and developing appropriate controls. Monitoring organic pollutants in water using the diffusive gradient in thin film technique (DGT) has attracted much attention due to more accuracy and convenience than the grab sampling methods. In this study, a novel cyclodextrin polymer (CDP) synthesized by the simple and green method in water was taken as an adsorbent for the binding gel. Four endocrine-disrupting chemicals (EDCs), bisphenol A (BPA), 17α-ethinylestradiol (EE2), 17β-estradiol (E2), and estriol (E3), were taken as models to determine the diffusion coefficients (4.68×10-6, 3.38×10-6, 3.34×10-6 and 4.31×10-6 cm2/s) and to test the performance of DGT, such as adsorption capacity and deployment time (1-5 day). The assembled CDP-DGT was adopted to determine four EDCs in a simulated water environment (3-9 of pH, 0.001-0.5 M of ionic strength (IS), and dissolved organic matter (DOM) of 0-20 mg/L). The ability of CDP-DGT sampling was verified in the Jiuxiang River and was carried out for a large-scale field application of in situ sampling EDCs in Taihu Lake basin. The results show that the total EDCs concentration range and the estradiol equivalent concentrations (EEQ) in Taihu Lake and its main rivers are 2.78 ng/L to 11.08 ng/L and 2.62 ng/L to 10.91 ng/L, respectively. The risk quotients (RQs) of all sampling sites in the region were greater than 1, indicating that EDCs pose a serious threat to aquatic organisms in the area. Therefore, the monitoring of EDCs in the Taihu Lake basin should be further strengthened. © 2022, The Authors. All rights reserved.

关键词： Risk assessment

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Transformation behavior and toxicity assessment of beaytlmethodeyammonNium chbride (BAC-12) disinfectant during hospital wastewater treatment

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Chemosphere 2025年 370卷 143981页

作者： Guo, Ruixue Zhang, Jingjing Liu, Jiaoqin Alfassam, Haifa E. Rudayni, Hassan A. Allam, Ahmed A. Qu, Ruijuan Huo, Zongli Zhu, Feng State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China School of Environment and Safety Engineering North University of China Shanxi Taiyuan030051 China Department of Biology College of Science Princess Nourah bint Abdulrahman University P.O. BOX 84428 Riyadh11671 Saudi Arabia Department of Biology College of Science Imam Mohammad Ibn Saud Islamic University Riyadh11623 Saudi Arabia Department of Zoology Faculty of Science Beni-suef University Beni-suef65211 Egypt Jiangsu Provincial Center for Disease Control and Prevention NO.172 Jiangsu Road Jiangsu Nanjing210003 China

This work focused on the transformation behavior of the emerging beaytlmethodeyammonium chbride (BAC-12) disinfectant existed in the treatment of medical sewage during its disinfection treatment. The degradation ability of ozone (O3) to BAC-12 was the best, followed by UV/NaOCl, UV, and NaOCl. The enhancement of BAC-12 in UV/NaOCl system is caused by the combined effect of UV photolysis, reactive chlorine species (RCS), and •OH. The transformation products of BAC-12 in the disinfection treatment were detected, and the chemical structure of products was rationalized by frontier molecular orbital and transition state theory methodologies. According to the ecological structure–activity relationship (ECOSAR) assessment, the intermediates of BAC-12 in UV, NaOCl, and UV/NaOCl treatments had lower half lethal concentration (LC50) and chronic toxicity (ChV) values with a higher ecotoxicity than BAC-12. O3 disinfection treatment of these toxic intermediates can significantly reduce the toxicity of the BAC-12 solution. This work provides necessary information on the potential environmental risks of BAC-12 arising from different disinfection methods in the treatment of medical wastewater. © 2024

关键词： Molecular orbitals

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Strengthen High-Loading Operation of Wastewater Treatment Plants by Composite Micron Powder Carrier: Microscale control of Carbon, Nitrogen, and Sulfur Metabolic Pathways

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SSRN 2023年

作者： Wang, Cheng Xian Lu, Bin Chen, Hao Chen, Huizhen Li, Tingting Lu, Wei Chai, Xiaoli State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University 1239 Siping Road Shanghai200092 China Changsha housing and Urban Rural Development Bureau Changsha410006 China Hunan Sanyou Environmental Protection Co. Ltd. Changsha410205 China Shanghai Key Lab. of D&A for Metal-Functional Materials School of Materials Science & Engineering Tongji University Shanghai201804 China

The concentration of activated sludge is a critical factor affecting the capacity and efficiency of s wastewater treatment plants (WWTPs). However, high concentrations of sludge can lead to the sludge loss in the secondary sedimentation tank, resulting in the decline in processing capacity, especially during low-temperature stages and sludge bulking. In this study, we investigated the effects of adding composite micron powder carriers (CMPC) to the biochemical units of WWTPs on sludge concentration and settling performance. The addition of 4 g/L of CMPC maintained the sludge concentration in the bioreactor at 8 g/L and resulted in good settling performance (Average sludge volume index (SVI) was 85 mL/g). Under a hydraulic retention time of 4.8 h, total nitrogen was removed from 35.00 mg/L to 11.40 mg/L with a removal efficiency of up to 67.43%. In addition, the SVI value of bulking sludge decreased from the original 695 to 111 mL/g by the 9th day of operation with the carrier dosage was 2 g/L. Metagenomic analysis revealed that CMPC can increase the relative abundance of denitrification functional bacteria, eg. Nitrospira_sp. and Myxococcales, from 9.44% to 13.98%. Carbon, nitrogen and sulfur metabolism pathways analysis showed that CPMC could enhance the utilization of small molecular fatty acids in activated sludge and promote electron transfer between nitrate and nitrite, improving the treatment capacity of wastewater. Furthermore, CPMC enhanced the relative abundance of Saprospiraceae in sludge, which could accelerate the degradation of polysaccharides in extracellular polymeric substances, weaken the hydrophilic properties of sludge, and improve the settling performance of sludge. Overall, these findings suggest that CMPC can effectively strengthen the high-loading operation of WWTPs by improving sludge concentration and sedimentation performance. © 2023, The Authors. All rights reserved.

关键词： Nitrogen

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Enhancing crop production in the Haihe Basin while addressing challenges related to water quantity and quality

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Science of the Total Environment 2024年 955卷 176800页

作者： Wang, Gang Yang, Jing Liu, Xia Zhang, Haodi Xu, Xiangbo Luo, Jiafa Bai, Zhaohai Ma, Lin Key Laboratory of Agricultural Water Resources Hebei Key Laboratory of Soil Ecology Center for Agricultural Resources Research Institute of Genetic and Developmental Biology The Chinese Academy of Sciences 286 Huaizhong Road Hebei Shijiazhuang050021 China University of Chinese Academy of Science 19 A Yuquan Road Shijingshan District Beijing100049 China School of Mathematics and Science Hebei GEO University 136 Huai'an Road Hebei Shijiazhuang050031 China College of Computer Science and Software Engineering Shenzhen University China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China AgResearch Limited Ruakura Research Centre Private Bag 3123 Hamilton New Zealand State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China

To tackle the challenge of ensuring food security while managing water availability and quality constraints in the Haihe Basin, a critical grain-producing region in China with a dense population and severe water degradation issues, we have developed a comprehensive spatial optimization (CSO) strategy. This approach integrates various crop and soil management practices, land consolidation, and cutting-edge breeding technologies. It also uses a spatial planning model based on linear programming, considering water quantity and quality constraints. Our research shows that crop yields may drop by 14 % (3780 Kt) compared to levels in 2017 due to restrictions on groundwater extraction and nitrogen (N) concentrations in leaching or runoff. However, by strategically maximizing overall crop yields through the integrated CSO strategy without changing the crop production structure, the total crop yield could potentially increase by 81 % (21,817 Kt) while using 3.0 % (86 Kha) less cultivated land than in 2017. This would help to fulfill the projected food demand in 2050. If the integrated aims to minimize the sown area after fulfilling the demand for crops in 2050, around 28 % of the sown area, or 820 Kha cropland, could be reduced compared with 2017. This reduction may save more land for natural conversation. Furthermore, total N losses, including ammonia, nitrous oxide emissions, runoff, and leaching, could be reduced by 23 %–43 % (139–252 Kt), depending on the specific optimization strategy goals. The stepwise integrated optimization strategy provides a feasible framework for the Haihe Basin, enabling the maintenance or even enhancing current crop yields while safeguarding water quality and quantity. © 2024 Elsevier B.V.

关键词： Comprehensive spatial optimization Crop yield Haihe Basin Nitrogen losses Water security

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Choline Chloride Pretreatment on Volatile Fatty Acids Promotion from Sludge Anaerobic Fermentation: In-Situ Deep Eutectic Solvents-Like Formation for Eps Disintegration and Associated Microbial Functional Profiles Upregulation

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SSRN 2023年

作者： Cao, Wangbei Fang, Shiyu Wu, Qian Wu, Yang Feng, Leiyu Xie, Zhihuai Feng, Qian Fang, Fang Xu, Zhixiang Luo, Jingyang Ma, Yingqun Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education Hohai University 1 Xikang Road Nanjing210098 China College of Environment Hohai University 1 Xikang Road Nanjing210098 China State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and Engineering Tongji University 1239 Siping Road Shanghai200092 China School of Energy and Power Engineering Jiangsu University Zhenjiang212013 China Shaanxi Key Laboratory of Energy Chemical Process Intensification School of Chemical Engineering and Technology Xi’an Jiaotong University Xi’an China

Slow solubilization/hydrolysis efficiency has been widely recognized as a limiting factor for volatile fatty acids (VFAs) production from waste activated sludge (WAS) via anaerobic fermentation. This study developed an innovative choline chloride (ChCl)-based approach for WAS treatment. Accordingly, the VFAs yield was increased by 2.5-623.3%, which was attributed to the concurrent acceleration of WAS solubilization, hydrolysis, and acidification. FTIR and molecular docking analysis showed that ChCl can attack and disrupt extracellular polymeric substances (EPS) by forming hydrogen bonds with organics occurred in WAS (i.e. proteins). More importantly, the generated VFAs in turn interacted with ChCl for in-situ deep eutectic solvents-like formation to significantly improve the organics dissolution of WAS for more bioavailable substrates associated with VFAs biosynthesis, and such effects were intensified with the VFAs level. Besides, ChCl exhibited "screening-effects" to enrich the hydrolytic and acidogenic anaerobes in WAS fermentation systems, while reduced VFAs-consumers. Meanwhile, the microbial metabolic profiles shift to favor the protein metabolism, and the genetic traits associated with extracellular and intracellular substrates metabolism, membrane transport, and fatty acid biosynthesis were all upregulated. Noteworthily, the functional hydrolytic and acidogenic species maintained their microbial activity for efficient VFAs production via quorum sensing and two-component regulatory systems to counteract ChCl stress. The ranking efficiency product indices revealed that ChCl pretreatment showed a higher sustainable footprint (84.0%) over other traditional pretreatment approaches for WAS fermentation in view of both economic and environmental benefits. This work provides an innovative niche for efficient VFAs production from WAS with the sustainable application. © 2023, The Authors. All rights reserved.

关键词： Volatile fatty acids

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微生物电化学污水炼制（英文）

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Engineering 2025年第3期 245-256页

作者：褚娜李大平曾建雄蒋永梁鹏 Fujian Key Laboratory of Pollution Control and Resource Reuse College of Environmental and Resource Sciences Fujian Normal University CAS Key Laboratory of Environmental and Applied Microbiology Environmental Microbiology Key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and Environment Fujian Agriculture and Forestry University State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University

Wastewater treatment significantly contributes to greenhouse gas emissions,which are further exacerbated by the environmental impact of external chemical *** response,microbial electrochemical wastewater refining has gained prominence at the interdisciplinary frontier of wastewater resource recovery and green *** progress has been made in utilizing active electrodes to stimulate CO2fixation rates,applying "binary electron donors" to produce high-value-added chemicals,and developing novel processes and *** review explores various aspects of microbial electrochemical wastewater refining,including microbial electrochemical monitoring of water quality,chemical synthesis from diverse carbon sources,and the deployment of pilot-scale systems for generating electricity,hydrogen,and methane,as well as for in-situ ***,it discusses the challenges and future directions,highlighting the importance of understanding mechanisms,advancing electrocatalyst and microbial engineering,and innovating hybrid *** conclusion,the widespread adoption of microbial electrochemical wastewater refining is emphasized for resource recovery and sustainable chemical production,ultimately reducing environmental impact.

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Capacity of China's Sustainability to Resist Climate Change

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SSRN 2022年

作者： Zhao, Rui Li, Xia Wang, Ying Xu, Zhenci Li, Fengting Xiong, Meiyu Jia, Qian State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai200000 China Department of Geography The University of Hong Kong 999077 Hong Kong Mitigation and Adaptation to Climate Change in Shanghai Shanghai Regional Climate Center China Meteorological Administration Shanghai200000 China

Achieving sustainability and coping with climate change are the greatest challenges to human survival and harmonious human-nature relationship. However, we lack research on quantifying the capacity of sustainability to resist climate change over space and time. Here, we developed a quantification method to assess resilience of sustainability (includes economic, social, and environmental dimensions) to climate change, and performed the first demonstration in China’s 280 cities. We found that resilience of China’s sustainability to climate change improved from 2005 to 2017, especially in Southwest China, but 6.8% of cities showed a decreasing trend. With the improvement of the resilience, the synergy among resilience in economic, social, and environmental dimensions increased. Economic development and sustainability improvement related to a higher but more disparity of the resilience. This study encourages researchers and policymakers worldwide to focus on resilience of sustainability to climate change to help achieve sustained development and prosperity under climate change. © 2022, The Authors. All rights reserved.

关键词： Climate change

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Synergistic co-removal of zinc(Ⅱ) and cefazolin by a Fe/amine-modified chitosan composite

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Chinese Chemical Letters 2019年第12期30卷 2196-2200页

作者： Chen Ling Yixuan Zhao Zixi Ren Jiangang Han Changqing Zhu Fu-Qiang Liu College of Biology and the Environment Nanjing Forestry UniversityNanjing 210037China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

A novel Fe/amine modified chitosan composite(Fe/N-CS) was facilely synthesized and showed higher affinity to both Zn(Ⅱ) and cefazolin(CEF) than its *** co-adsorption of them by Fe/NCS was observed in varied *** adsorption amount maximally increased by 100.1% for Zn and68.2% for CEF in bi-solute *** initial adsorption rate of Zn(Ⅱ) also improved with *** increasing temperature facilitated *** results of the preloading tests,FTIR/XPS characterizations and DFT calculations suggested that(1) both polyamines and Fe sites participated in the adsorption of Zn(Ⅱ) and CEF,(2) Zn(Ⅱ) could serve as a new efficient site for CEF,forming [amineZn-CEF]/[FeOH-Zn-CEF] ternary complexes,and(3) the co-presence of CEF shielded the electrostatic repulsion between protonated amines and Zn(Ⅱ),contributing to the enhancement of Zn(Ⅱ) ***,the ion strength exerted positive and negative influences on the adsorption of Zn(Ⅱ) and CEF,***,CEF and Zn(Ⅱ) were successively recovered by 0.1 mol/L NaOH followed by2 mmol/L ***/N-CS could be stably reused five *** findings imply that Fe/N-CS is promising for the highly efficient co-removal of concurrent heavy metals and antibiotics.

关键词： Coadsorption Heavy metal ions Antibiotics Biomass Bridging effect Polyamine Hydrous ferric oxide

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