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Mercury flows in large-scale gold production and implications for Hg pollution control

Journal of environmental Sciences 2018年第6期30卷 91-99页

作者： Qingru Wu Shuxiao Wang Mei Yang Haitao Su Guoliang Li Yi Tang Jiming Hao State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084 China College of Electromechanical Engineering Qingdao University of Science and Technology Qingdao 266061 China

Large-scale gold production（LSGP） is one of the five convention-related atmospheric mercury（Hg） emission sources in the Minamata Convention on Mercury. However, field experiments on Hg flows of the whole process of LSGP are limited. To identify the atmospheric Hg emission points and understand Hg emission characteristics of LSGP, Hg flows in two gold smelters were studied. Overall atmospheric Hg emissions accounted for 10%–17% of total Hg outputs and the Hg emission factors for all processes were 7.6–9.6 kg/ton. There were three dominant atmospheric Hg emission points in the studied gold smelters, including the exhaust gas of the roasting process, exhaust gas from the environmental fog collection stack and exhaust gas from the converter of the refining process. Atmospheric Hg emissions from the roasting process only accounted for 16%–29% of total emissions and the rest were emitted from the refining process. The overall Hg speciation profile（gaseous elemental Hg/gaseous oxidized Hg/particulate-bound Hg） for LSGP was 34.1/57.1/8.8. The dominant Hg output byproducts included waste acid, sulfuric acid and cyanide leaching residue. Total Hg outputs from these three byproducts were 80% in smelter A and 84% in smelter B. Our study indicated that previous atmospheric Hg emissions from large-scale gold production might have been *** emission control in LSGP is not especially urgent in China compared to other significant emission sources（e.g., cement plants）. Instead, LSGP is a potential Hg release source due to the high Hg output proportions to acid and sludge.

关键词： Large-scale gold production Mercury Flow analysis Emission characteristics

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Phage Lysis-Mediated Reduction of Antibiotic-Resistant Bacteria Alleviates Micro/Nanoplastic-Driven Antimicrobial Resistance Dissemination in Anaerobic Digestion

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Water Research 2025年

作者： Xingxing Zhang Pengbo Jiao Bing Li Xu-Xiang Zhang Liping Ma Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste School of Ecological and Environmental Sciences East China Normal University Shanghai 200241 PR China Key Laboratory of Microorganism Application and Risk Control Ministry of Ecology and Environment Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 PR China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210023 PR China Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area Ministry of Natural Resources Shanghai 200062 PR China

Micro/nanoplastics (MPs/NPs) prevalent in anaerobic digestion (AD) have posed escalating threats to antimicrobial resistance (AMR) dissemination, yet mechanistic insights remain insufficient. Here we investigated polypropylene (PP)-MPs (200 μm) and PP-NPs (100 nm) at environmentally relevant concentrations (10, 50, and 100 mg/g TS) on antibiotic resistance gene (ARG) dynamics and transfer mechanisms using metagenomics and bioinformatic modeling. PP-MPs/NPs significantly elevated (6.4–17.8%, p < 0.05) ARG abundance through selective enrichment of aminoglycoside, mupirocin, multidrug, polymyxin, sulfonamide, tetracycline, and novobiocin ARGs. Metagenomic assembly revealed the particle-induced ecological niche specialization of antibiotic-resistant bacteria (ARB), notably the multi-resistant ESKAPE pathogen Enterobacter hormaechei (53.4–69.4% enrichment, p < 0.05), which harbored mobile aad A, qac Edelta1, and sul 1 via conjugative plasmids. Mechanistically, MPs/NPs facilitated horizontal gene transfer (HGT) through synergism of plasmids and phages. The enhanced abundance of conjugation elements, enriched plasmid-borne ARGs, and extensive HGT events promoted plasmid-conjugative transfer, while the strongly correlated ARG-carrying lysogenic phage−host pairs highlighted phage-mediated transfer under MPs/NPs. The significant increase of phage-to-host-ratio (1.0–1.2 folds) revealed the underestimated role of phages lysing ARB under MPs/NPs stress, thereby contributing to ARG load reduction. A novel risk assessment framework prioritizing prevalence, enrichment, mobility, and host pathogenicity identified dfr A3, mef B, OXA-347, and tet 44 as high-risk biomarkers and quantified 1.5–9.9% increased health risks in digestate-exposed scenarios. These findings reveal the neglected role of phage lysis driving ARG reduction, providing actionable targets for mitigating plastic-driven resistance in AD.

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Effects of ultrasonic treatment on dithiothreitol(DTT) assay measurements for carbon materials

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Journal of environmental Sciences 2019年第10期31卷 51-58页

作者： Haotian Jiang Yun Xie Yanli Ge Hong He Yongchun Liu State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center forEco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Aerosol and Haze Laboratory Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Center for Excellence in Urban Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021China

The dithiothreitol(DTT)assay is the most commonly used method to quantify the oxidative potential of fine ***,the reported DTT decay rates of carbon black(CB)materials vary greatly among different *** might have resulted from either the intrinsic toxicity of CB or the unsuitability of the DTT assay protocol for CB *** the current study,the protocol of the DTT assay for CB materials has been carefully *** was found that the dispersion degree of CB particles in water has a great influence on the DTT decay rate of CB *** CB particles(special black 4A(SB4A)and Printex U)and single-walled carbon nanotube tube(SWCNT),the DTT decay rate after sonication for 10 min became 4.2,4.6 and 1.7 times higher than that without *** rate continued to grow as a function of ultrasound time up to 30 min of *** the concentration of soluble transition metals and surface oxygen-containing species such as carbonyls increased slightly with sonication,they had no significant effects on the measured DTT activity,while the increase in the dispersion degree of aggregates was found to play a vital role in the observed enhancement of the DTT decay rates for different CB *** on our results,30 min of sonication is recommended for sample dispersion when measuring the DTT decay rate of CB materials.

关键词： Sonication Dispersion Dithiothreitol(DTT) assay Carbon nanomaterials

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The effect of non-antibiotic pharmaceuticals and personal care products on antibiotic resistance genes in landfill refuse should not be underestimated

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Waste Management 2025年 204卷

作者： Yue Sun Hui Liu Yu-Xin Wang Qing-Yu Liu Xiao-Song He College of Water Sciences Beijing Normal University Beijing 100875 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China Ministry of Ecology and Environment Key laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing 100012 China The School of Chemistry and Life Resources Renmin University of China Beijing 100872 China College of Resources and Environment University of Chinese Academy of Sciences Beijing 101408 China

Municipal landfills serve as significant reservoirs for pharmaceuticals and personal care products (PPCPs) as well as antibiotic resistance genes (ARGs). While most previous studies have focused on antibiotics, there is limited information regarding the occurrence of non-antibiotic PPCPs in landfill refuse and their impact on ARGs. This study systematically investigated the occurrence and evolutionary characteristics of 35 PPCPs, 15 ARGs, and 3 mobile genetic elements (MGEs) in landfill refuse of varying ages. The results revealed that 26 PPCPs were detected in landfill refuse, with concentrations ranging from 10 -2 to 10 5 ng/g. Notably, nalidixic acid, propranolol, ibuprofen, diphenhydramine, and caffeine had detection frequencies of 100 %. Moreover, hydrophilic PPCPs increased and then decreased during landfilling, while hydrophobic PPCPs exhibited the highest concentrations in aged refuse. Positive matrix factorization showed that, in addition to the expired or unused PPCPs from domestic wastes, municipal sludge, discarded kitchen wastes and pet manure also contributed to PPCP presence in the landfill. This finding breaks the previous understanding that PPCPs in landfills primarily originate from the expired/unused PPCPs. The overall abundance of ARGs and MGEs displayed a decreasing trend during landfilling. The microbial composition had the greatest effect on ARGs in landfilled refuse, with Proteobacteria , Bacteroidota , Firmicutes , and Actinobacteriota identified as key hosts of drug-resistant pathogens. Interestingly, non-antibiotic PPCPs accounted for 11.4 % of the variation in ARGs in landfill refuse, surpassing the 9.8 % contribution of antibiotics. These findings provide novel insights into the proliferation of ARGs in landfills, highlighting the need to recognize the potential risks associated with non-antibiotic PPCPs.

关键词： Antibiotic PPCPs Antibiotic resistance genes (ARGs) Landfill refuse Non-antibiotic PPCPs Source apportionment

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Quantification of multi-antibiotic resistant opportunistic pathogenic bacteria in bioaerosols in and around a pharmaceutical wastewater treatment plant

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Journal of environmental Sciences 2018年第10期30卷 53-63页

作者： Mengyu Zhang Jiane Zuo Xin Yu Xuchuan Shi Lei Chen Zaixing Li State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University School of Environmental Science and Engineering Hebei University of Science and Technology

Pharmaceutical wastewater treatment plants（WWTPs） are thought to be a ＂seedbed＂ and reservoirs for multi-antibiotic resistant pathogenic bacteria which can be transmitted to the air environment through aeration. We quantified airborne multi-antibiotic resistance in a full-scale plant to treat antibiotics-producing wastewater by collecting bioaerosol samples from December2014 to July 2015. Gram-negative opportunistic pathogenic bacteria（GNOPB） were isolated, and antibiotic susceptibility tests against 18 commonly used antibiotics, including 11 β-lactam antibiotics, 3 aminoglycosides, 2 fluoroquinolones, 1 furan and 1 sulfonamide, were *** than 45% of airborne bacteria isolated from the pharmaceutical WWTP were resistant to three or more antibiotics, and some opportunistic pathogenic strains were resistant to 16 antibiotics, whereas 45.3% and 50.3% of the strains isolated from residential community and municipal WWTP showed resistance to three or more antibiotics. The calculation of the multiple antibiotic resistance（MAR） index demonstrated that the air environment in the pharmaceutical WWTP was highly impacted by antibiotic resistance, while the residential community and municipal WWTP was less impacted by antibiotic resistance. In addition, we determined that the dominant genera of opportunistic pathogenic bacteria isolated from all bioaerosol samples were Acinetobacter, Alcaligenes, Citrobacter, Enterobacter, Escherichia, Klebsiella, Pantoea, Pseudomonas and Sphingomonas. Collectively, these results indicate the proliferations and spread of antibiotic resistance through bioaerosols in WWTP treating cephalosporin-producing wastewater, which imposed a potential health risk for the staff and residents in the neighborhood, calling for administrative measures to minimize the air-transmission hazard.

关键词： Multi-antibiotic resistance Gram-negative opportunistic pathogenic bacteria Bioaerosols Pharmaceutical wastewater treatment plants

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Ferric Chloride Further Simplified the Horizontal Gene Transfer Network of Antibiotic Resistance Genes in Anaerobic Digestion

SSRN

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SSRN 2022年

作者： Zhang, Junya Lu, Tiedong Xin, Yuan Wei, Yuansong State Key Joint Laboratory of Environmental Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China Department of Isotope Biogeochemistry Helmholtz Centre for Environmental Research – UFZ Leipzig04318 Germany University of Chinese Academy of Sciences Beijing100049 China Agricultural Resource and Environment Research Institute Guangxi Academy of Agricultural Sciences Guangxi Nanning530007 China College of Life Science and Technology Guangxi University Guangxi Nanning530005 China

The role of ferric chloride (FC) on the reduction of antibiotic resistance genes (ARGs) in anaerobic digestion (AD) system was investigated from the perspective of vertical (VGT) and horizontal gene transfer (HGT) network through the high-throughput qPCR (HT-qPCR). Although FC showed limited impacts on methane production in AD of swine manure, the tetracycline and MLSB resistance genes were specifically reduced at the end, where tetQ of antibiotic target protection and ermF of antibiotic target alteration contributed the most to the reduction. Both VGT and HGT network were divided into three modules, and the complexity of HGT network was largely reduced along with AD, where the HGT connection was reduced from 683 (Module III) to 172 (Module I), and FC addition could further reduce the relative abundance of ARG hosts in Module I. The contribution of VGT and HGT to the changes of ARGs in AD was further deciphered, and although the VGT reflected by the changes of microbial community contributed the most to the dynamics of ARGs (68.0%), the HGT contribution could further be reduced by the FC addition. This study provided a new perspective on the fate of ARGs response to the FC addition in the AD system. © 2022, The Authors. All rights reserved.

关键词： Gene transfer

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Oxygen vacancies-mediated the peracetic acid activation to selectively generate 1O2 for water decontamination

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Water Research 2025年 282卷 123765页

作者： Chen, Yi Li, Qian Su, Ruidian Gao, Yixuan An, Ning Rong, Yu Xu, Xing Ma, Defang Wang, Yan Gao, Baoyu Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse Shandong Key Laboratory of Environmental Processes and Health School of Environmental Science and Engineering Shandong University Qingdao266200 China Shenzhen Research Institute of Shandong University Shenzhen518057 China Key Lab of Marine Environment and Ecology College of Environmental Science and Engineering Ministry of Education Ocean University of China Qingdao266100 China College of Environmental Sciences and Engineering State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems Peking University Beijing100871 China

As a pre-oxidation unit, developing non-radical pathway-dominant advanced oxidation processes (AOPs) with remarkably-efficient oxidation, superior environmental robustness, and ecological safety is essential in actual water pollution control. Herein, using Co3O4 as an example, we present an oxygen vacancies (OVs)-mediated peracetic acid (PAA) activation process, thereby predominantly generating singlet oxygen (1O2) for degrading contaminants. In-situ monitoring of PAA activation by OVs-rich Co3O4 (Co3O4-OVs) reveals that surface oxygen-containing intermediates (e.g., *OH and *O) are the precursors of 1O2. Theoretical calculations show that the selective adsorption of terminal oxygen atoms (ATO) in PAA serves as an activity descriptor for 1O2 generation. OVs can induce electron redistribution, triggering the ATO-dominated PAA adsorption to form the Co3O4-OVs-PAA* complex, followed by O-O bond breakage to yield *OH. Concurrently, OVs modulate the Co d-band center, lowering the energy barrier for 1O2 formation. The system enables ultra-fast catalytic performance (kobs = 1.17 min–1) for degrading sulfamethoxazole, outperforming pristine Co3O4 by 11.64-fold. The high-selectivity towards non-radical pathway endows the Co3O4-OVs/PAA system with remarkable stability in complex environment backgrounds and continuous-flow microreactor. This work not only provides a broad perspective on the modulation of non-radical pathways via defect engineering, but also advances the development of PAA-based AOPs for water decontamination. © 2025

关键词： Water pollution control

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Erratum to “Cleaner production for achieving the sustainable development goals” [J. Clean. Prod. (271), 20 October 2020, 122127]

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Journal of Cleaner Production 2024年 481卷

作者： B.F. Giannetti F. Agostinho J.J. Cabello Eras Zhifeng Yang C.M.V.B. Almeida Universidade Paulista (UNIP) Programa de Pós-graduação em Engenharia de Produção Laboratório de Produção e Meio Ambiente São Paulo Brazil State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China Universidad de la Costa Barranquilla Colombia

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Retrofitting coal-fired power plants with biomass co-firing and CCS for net zero carbon emission:A plant-by-plant assessment based on GIS-LCA framework

Retrofitting coal-fired power plants with biomass co-firing ...

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第一届全国碳中和与绿色发展大会

作者： Rui Wang Shiyan Chang Xueqin Cui Jin Li Linwei Ma Amit Kumar Yaoyu Nie Wenjia Cai Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTs International Joint Laboratory on Low Carbon Clean Energy Innovation Tsinghua UniversityBeijingChi State Key Joint Laboratory of Environment Simulation and Pollution Control(SKLESPC) School of Enviro State Key Laboratory of Power Systems Department of Thermal EngineeringTsinghua-BP Clean Energy Cen Department of Mechanical Engineering 10-263 Donadeo Innovation Centre for EngineeringUniversity of Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTs

The targets of limiting global warming levels below 2℃ or even 1.5℃ set by Paris Agreement heavily rely on bioenergy with carbon capture and storage(BECCS),which can remove carbon dioxide in the atmosphere and achieve net zero greenhouse gas(GHG)*** and coal co-firing with CCS is one of BECCS technologies,as well as a pathway to achieve low carbon transformation and upgrading through retrofitting coal power ***,few studies have considered co-firing ratio of biomass to coal based on each specific coal power plant's characteristic information such as location,installed capacity,resources allocation and logistic ***,there is a need to understand whether it is worth retrofitting any individual coal power plant for the benefit of GHG emissions *** is also important to understand which power plant is suitable for retrofit and the associated co-firing *** order to fulfill this gap,this paper develops a framework to solve these questions,which mainly include three ***,biomass resources are assessed at 1-km spatial resolution with the help of RS-GIS ***,by setting biomass collection points and linear program model,resource allocation and supply chain for each power plants are ***,assessing the life-cycle emission for each power *** this study,Hubei Province in China is taken as the research area and study *** main conclusions are as follows:(1)biomass co-firing ratio for each CCS coal power plant to achieve carbon neutral is between 40%~50%;(2)lower co-firing ratio sometimes may obtain better carbon emission reduction benefits;(3)even the same installed capacity power plants should consider differentiated retrofit strategy according to their own *** on the results and analysis above,retrofit suggestions for each power plant are made in the discussion.

关键词： Net zero carbon emission,coal-fired power plant,biomass co-firing GIS-LCA,supply chain,CCS

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Occurrence and ecological risks of pharmaceuticals along the Yangtze River Basin of China: Insights from target analysis and suspect screening strategy

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Journal of Hazardous Materials 2025年 495卷

作者： Chong Chen Chengcheng Bu Qi Wang Yutong Zhang Shaopeng Xu Yu Hua Ruolan Jia Huiju Lin Xiaolei Wang Zhiwei Gan Xiong Xiong Limin Ma Kenneth Mei Yee Leung Yuefei Ruan State Key Laboratory of Marine Pollution (SKLMP) and Department of Chemistry City University of Hong Kong Hong Kong SAR 999077 China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China Key Laboratory of Yangtze River Water Environment Ministry of Education College of Environmental Science and Engineering Tongji University Shanghai 200092 China Research Centre for the Oceans and Human Health City University of Hong Kong Shenzhen Research Institute Shenzhen 518057 China School of Energy and Environment City University of Hong Kong Hong Kong SAR 999077 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China College of Architecture and Environment Sichuan University Chengdu 610065 China Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 China

Pharmaceuticals have gained global attention in recent decades due to their substantially growing demand and ecological impacts. This study aimed to comprehensively investigate the pollution status of 64 target pharmaceuticals in water (i.e., dissolved phase), suspended particulate matter, and sediment in the Yangtze River Basin (YRB). Across the three environmental compartments, our results uncovered the presence of 49−58 and 23−62 pharmaceuticals in YRB and Huangpu River (HR), respectively. The downstream area of HR showed significantly higher cumulative concentrations of detected pharmaceuticals compared to the other studied sections in the YRB ( p  < 0.05), reaching 4995.61 ± 4288.16 ng/L in the dissolved phase. The suspended particulate matter demonstrates a higher capacity to adsorb pharmaceuticals from the dissolved phase in comparison to surface sediment, and the organic carbon content in sediments emerged as a critical factor influencing the distribution behavior of pharmaceuticals. Suspect screening confirmed the presence of 170 compounds in the three environmental compartments, including 26 predicted transformation products found in this study and 144 reported pharmaceuticals and transformation products from previous studies. Based on the toxicological prioritization index score, diclofenac was ranked the top priority chemical of concern. The results underscore the estuary region of YRB as a pollution hotspot that gathers and transports pharmaceutical residues from upstreams into the East China Sea. Moreover, our findings provide a foundation for implementing pollutant control measures and effective environmental management strategies in this densely populated river basin.

关键词： Contaminants of emerging concern High-resolution mass spectrometry Multi-phase distribution Risk quotient Spatial variation

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