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SSRN 2024年

作者： Lu, Yue Xu, Yuantao Zhong, Linrui Xie, Qingqing Liu, Qi Zhang, Shoujuan College of Environmental Science and Engineering Hunan University Changsha410082 China Shenzhen Research Institute Hunan Univerisy Shenzhen510082 China Key Laboratory of Environment Biology and Pollution Control Hunan University Ministry of Education Changsha410082 China

Extracellular respiratory bacteria (ERB) have been confirmed to promote nitrobenzene (NB) degradation through extracellular electron transfer (EET) process. However, the efficiency of EET process via artificially regulating cytochrome or nanowires were limited depending on the types and metabolic function of ERB. This work investigated the effects of conductive polypyrrole (Pyy) materials (0.05-0.50 g/L) as electron shuttle (ES) on G. sulfurreducens PCA (as typical ERB) and associated NB degradation process. The results showed that the Pyy-PCA composite system with the dosing of 0.50 g/L Pyy achieved complete reduction of 100 μM NB to aniline within 12 h, whose first-order reduction rate was as 62.5 times higher than that of pure PCA cells. The pure Pyy treatment was capable to remove 32 μm NB within 2 h through physical adsorption rather than degradation process, while it alleviated the toxic effect of NB on cells and shortened the distance of EET process. The morphology and structural characterization of Pyy materials with PCA strain confirmed the formation of dense aggregates which maintained similar structures during the NB degradation. Electrochemical measurements suggested that the Pyy-PCA composite system had better electrochemical properties than both pure PCA cells and initial Pyy molecules under the experimental condition, which might play a vital role in accelerating electron transfer for NB degradation. This work enriched the understanding of the interaction between Pyy and ERB, and provided a feasible way for the bioremediation of nitroaromatic-containing environment. © 2024, The Authors. All rights reserved.

关键词： Polypyrroles

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Cost-Effective Instant Air Disinfection for Building Ventilation System by a Combination of Uv and Micro-Static Electricity

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SSRN 2022年

作者： Xie, Yankai Zhu, Xiaojing Zhang, Pengyi Wang, Shan Yang, Jie Li, Jinge State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Beijing Key Laboratory for Indoor Air Quality Evaluation and Control Beijing100084 China

The increased threats of pathogenic bioaerosol make the air disinfection in heating, ventilation, and air conditioning (HVAC) systems crucial to occupants’ health. To satisfy the high efficiency, superspeed, and wide temperature range of HVAC air disinfection, UV irradiation and its combination with micro-static electricity were studied in two full-scale ducted ventilation systems. UV 254 could efficiently disinfect *** (>99%) at high temperature (31±2 °C) and low airflow rates (1.2 m sˉ 1 ) but was weakened at lower temperatures and higher airflow rates. Its combination with micro-static electricity could remarkably overcome these adverse factors and realize efficient disinfection within the retention time of 0.21 s. Especially for the relatively stubborn *** var. niger , the combination process improved the disinfection efficiency to 82% at 16±2°C and the airflow rate of 2.4 m sˉ 1 , while UV 254 was only 52.9%. Since the UV 185 disinfection was more effective than that of UV 254 , the UV 185 -based combination could further enhance the *** var. niger to 93.1%. Besides the disinfection stability, the combination process has advantages in pressure drop (around 50 Pa), energy consumption (e.g., 0.115 kW·h kmˉ 3 ), and equipment costs (1,500- 3,000 CNY), making it potentially cost-effective for air disinfection in HVAC systems. © 2022, The Authors. All rights reserved.

关键词： Ventilation

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Accelerating Anaerobic Oxidation of Methane Coupled with Extracellular Electron Transfer to Electrodes Via Magnetite Stimulating Membrane-Bound Proteins of Anaerobic Methanotrophic (Anme) Archaea/Methanogens

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SSRN 2023年

作者： Liang, Lianfu Wang, Mingwei Yu, Qilin Zhao, Zhiqiang Zhang, Yaobin Ministry of Education School of Environmental Science and Technology Dalian University of Technology Dalian116024 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

Methane-dependent bioelectrochemcial systems (BESs) have been recently considered as a promising approach for mitigating methane emission, energy harvesting as well as water environmental remediation. However, the mechanisms of extracellular electron transfer (EET) from anaerobic methanotrophic (ANME) archaea/methanogens to electrodes are still unclear. The study presented here showed that, anodic biofilms amended with magnetite primarily comprised of ANME archaea/methanogens were electrically conductive, determined with a conducting-probe atomic force microscope. Scanning electrochemical microscopy and electrochemical Fourier transform infrared spectra found that, anodic biofilms were redox-based electrically active, with a high concentration of redox-active proteins displayed on their surface. Metagenomics also detected some electroactive bacteria (Ignavibacterium and Geobacter species), the abundance of which however declined with magnetite. In addition, the difference in the abundance of genes encoding the cytochrome c (CYC)-like proteins with or without magnetite was not evident, and the abundance of genes encoding the type IV pilus assembly proteins declined with magnetite. Remarkably, magnetite specially increased the abundance of genes encoding the membrane-bound proteins, Rnf, and periplasmic heterodisulfide reductase, HdrABC, in ANME archaea/methanogens, providing a possibility that magnetite sped up methane oxidation as well as electron transfer from inner membrane to outer membrane in anaerobic oxidation of methane (AOM) coupled with EET to electrodes. As a result, the current density in the magnetite-supplemented BES was increased by approximately 6-9 folds. © 2023, The Authors. All rights reserved.

关键词： Electrodes

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Enhanced triallyl isocyanurate(TAIC)degradation through application of an 03/UV process:Performance optimization and degradation pathways

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Frontiers of environmental Science & Engineering 2020年第4期14卷 103-113页

作者： Yapeng Song Hui Gong Jianbing Wang Fengmin Chang Kaijun Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China School of Chemical&Environmental Engineering China University of Mining and TechnologyBeijing 100083China

Triallyl isocyanurate(TAIC,C12H15N3O3)has featured in wastewater treatment as a refractory organic compound due to the significant production capability and negative environmental *** degradation was enhanced when an ozone(O3)/ultraviolet(UV)process was applied compared with the application of an independent O3 *** 99%of TAIC could be degraded in 5 min during both processes,the O3/UV process had a 70%mineralization rate that was much higher than that of the independent O3 process(9%)in 30 *** possible degradation pathways were proposed based on the organic compounds of intermediate products identified during TAIC degradation through the application of independent 03 and O3/UV *** impacted both the direct and indirect oxidation *** and alkaline conditions preferred direct and indirect reactions respectively,with a pH of 9 achieving maximum Total Organic Carbon(TOC)*** CO32-and HCO3-decreased TOC removal,however only CO32-negatively impacted TAIC *** of Cl-as a radical scavenger became more marked only at high concentrations(over 500 mg/L Cl-).Particulate and suspended matter could hinder the transmission of ultraviolet light and reduce the production of HO·accordingly.

关键词： Triallyl isocyanurate O3/UV Advanced oxidation processes(AOP) Degradation pathway

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Insight into the promotion mechanism of activated carbon on the monolithic honeycomb red mud catalyst for selective catalytic reduction of NO_(x)

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Frontiers of environmental Science & Engineering 2021年第5期15卷 177-186页

作者： Qiuzhun Chen Xiang Zhang Bing Li Shengli Niu Gaiju Zhao Dong Wang Yue Peng Junhua Li Chunmei Lu John Crittenden National Engineering Laboratory for Coal-Burning Pollutants Emission Reduction School of Energy and Power EngineeringShandong UniversityJinan250061China Brook Byers Institute for Sustainable Systems and School of Civil and Environmental Engineering Georgia Institute of Technology828 West Peachtree StreetAtlantaGA30332USA State Key Joint Laboratory of Environment Simulation and Pollution Control National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and EquipmentSchool of EnvironmentTsinghua UniversityBeijing100084China Energy Institute Qilu University of Technology(Shandong Academy of Sciences)Jinan250013China

Our previous study proved that the acid-pretreatment process could efficiently activate red mud(RM)for the selective catalytic reduction(SCR)of NO_(x).However,in terms of the molding process,which is the key step determining whether it can be applied in large-scale industrial,the surface acidity and reducibility of catalyst always decreased dramatically,and part of surface area and pore structure were *** this study,we prepared monolithic honeycomb red mud(MHRM)catalysts with activated carbon(AC)as an accelerant and investigated the effect of AC on the *** results showed that the MHRM with 3 wt.%of AC(MHRM-AC3)exhibited the best SCR performance,and kept more than 80%NO_(x)conversion in the range of 325℃–400℃.Compared with the MHRM,MHRM-AC1,and HMRM-AC5,the MHRM-AC3 has more mesoporous and macroporous structures,which can provide more adsorption active *** AC significantly improved NH3 adsorption and surface reducibility,which was mainly due to the increase of the surface acid sites(especially the Brönsted acid sites),the concentration of Fe(II),and the surface adsorbed *** presence of more Fe(Ⅱ)enriched the surface oxygen vacancies,as well as the surface adsorbed oxygen,due to the charge imbalance and unsaturated chemical *** surface adsorbed oxygen exhibited more active than lattice oxygen owing to its higher mobility,which was conducive to NO_(x)reduction in the SCR reaction.

关键词： Selective catalytic reduction Iron-based catalyst Red mud Monolithic catalyst Activated carbon

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Life Cycle Assessment of a Local Tannery in Southern Italy. A Chrome and Vegetable Tanning Processes Evaluation

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SSRN 2022年

作者： Oliveira, Mariana Zucaro, Amalia Passaro, Renato Ulgiati, Sergio Italy Italy Italy Beijing Normal University School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control Beijing100875 China

The fashion industrial sector accounted for about 25% of the total industrial CO2eq emissions in 2019. Italian tanneries are committed to improving performance and sustainability and already present a reduction in water, energy, and chemical consumption by substituting chromium compounds with natural tanning agents. However, the amount of chemicals utilised is high, and tanning hides is risky for human health and ecosystems. This study has the goals of assessing a site-specific tannery in Southern Italy tannery using Life Cycle Assessment (LCA) to identify the significant hotspots throughout all impact categories and compare two tanning processes - chrome (CrT) and vegetable (VgT). Chromium compounds are the most significant hotspot explicitly related to the CrT Retanning process. For the VgT, various chemicals employed during the preparation of the hides for the tanning process were identified as hotspots. Furthermore, distinct policy should support operational costs, project risks, and management progresses in all production scales towards resource efficiency. Finally, only an integrated evaluation of costs and benefits can validate the feasibility and sustainability of the suggested solutions identified in this study. © 2022, The Authors. All rights reserved.

关键词： Life cycle

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Potential Effects of Cu2+ Stress on Nitrogen Removal Performance, Microbial Characteristics, and Metabolism Pathways of Biofilm Reactor

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SSRN 2024年

作者： Zhang, Shuai Huang, Xiao Dong, Wenyi Wang, Hongjie Hu, Liangshan Zhou, Guorun Zheng, Zhihao Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science & Technology Nanjing210044 China Shenzhen518055 China State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin150090 China

Sequencing batch biofilm reactors (SBBR) were utilized to investigate the impact of Cu2+ on nitrogen (N) removal and microbial characteristics. The result indicated that the low concentration of Cu2+ facilitated the removal of ammonia nitrogen (NH4+-N), total nitrogen (TN). Compared with the control group of the average effluent concentration, the average effluent concentrations of NH4+-N, TN were found to decrease by 40.53%, 15.86%, respectively. Conversely, the high concentration of Cu2+ resulted in a increase of 94.27%, 14.23% in the aforementioned parameters, compared with the control group. The addition of low concentrations of Cu2+ significantly (P © 2024, The Authors. All rights reserved.

关键词： Nitrogen removal

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Remediation on antimony-contaminated soil from mine area using zero-valent-iron doped biochar and their effect on the bioavailability of antimony

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Chemosphere 2024年 363卷 143015页

作者： Ji, Jianghao Mu, Yizhen Ma, Siyi Xu, Siqin Mu, Xiaoying Key Laboratory of Karst Georesources and Environment Ministry of Education Guizhou University Guiyang550025 China Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation College of Resources and Environmental Sciences China Agricultural University Beijing100193 China College of Resources and Environmental Engineering Guizhou University Guizhou Guiyang550025 China Guizhou Karst Environmental Ecosystems Observation and Research Station Ministry of Education Guiyang550025 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

Due to the bioavailability and movement of antimony in trophic web, the overexploitation of antimony mine resulted in antimony contamination that harmed the ecology nearby, raising concerns for public health. Whereas, most researches focused on the removal of antimony in the aqueous instead of the immobilization of antimony in the soil. Herein, the immobilized performance of biochar (BC) loaded with nano zero-valent iron (nZVI-BC) on antimony in the soil near the smelting area was researched through pot experiments for the first time, and its stabilization mechanism on antimony was investigated by valent state variation of antimony. The results demonstrated that BC restricted the cation exchange capacity and catalase activity in the soil, while nZVI-BC had a favorable and negative impact on two variables, respectively. The nZVI-BC showed more stable immobilization capacity on antimony over time than BC, whose exchangeable speciation only marginally rose (2%–6%), although the exchangeable speciation of antimony fell both from 15% to 2% after adding the BC and nZVI-BC, The electron attraction force between nZVI-BC and antimony was also intensified owing to the oxidation-reduction process, which was considered as the stabilizing principle of nZVI-BC on antimony in soil. Furthermore, the decreased bioaccumulation factor for the perennial ryegrass (0.46–0.21) and Galinsoga parviflora Cav. (0.26–0.17) stated that the BC effectively mitigated the bioaccumulation risk of antimony. © 2024 Elsevier Ltd

关键词： Bioaccumulation

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Screening and Optimization of Soil Remediation Strategies Assisted by Machine Learning

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SSRN 2024年

作者： Zhang, Bowei Wang, Xin Li, Rong Zhang, Lili Liu, Chongxuan Shenzhen Urban Public Safety and Technology Institute Shenzhen518046 China The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of Education School of Environment and Energy South China University of Technology Guangzhou510006 China Shenzhen University China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China

A numerical approach assisted by machine learning was developed for screening and optimizing soil remediation strategies. The approach includes a reactive transport model for simulating the remediation cost and effect of applicable remediation technologies and their combinations for a target site. The simulated results were used to establish a relationship between the cost and effect using a machine learning method. The relationship was then used by an optimization method to provide optimal remediation strategies under various constraints and requirements for the target site. The approach was evaluated for a site contaminated with both arsenic and polycyclic aromatic hydrocarbons at a former ship building factory in Guangzhou city, China. An optimal strategy was obtained and successfully implemented at the site that includes partial excavation of the contaminated soils and natural attenuation of the residual contaminated soils. The advantage of the approach is that it can fully consider the natural attenuation capacity in designing remediation strategies to reduce remediation cost, and can provide cost-effective remediation strategies under variable constraints for policy makers. The approach is general that can be applied for screening and optimizing remediation strategies at other remediation sites. © 2024, The Authors. All rights reserved.

关键词： Machine learning

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Benthic bioturbations weaken the stability of blue carbon storage

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National Science Open 2025年第2期4卷 205-218页

作者： Yingrong Huang Peng Zhang He-Bo Peng Feng Pan Yan Liu Kai Wang Yu Cai Jianyu Wang Zhenyan Wang Chunmiao Zheng Hailong Li Ding He Junjian Wang Chenyuan Dang Pengbao Wu Ji Chen Damien Maher Kai Xiao School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds Institute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou 510006China Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems Fujian Key Laboratory of Coastal Pollution Prevention and ControlCollege of the Environment&EcologyXiamen UniversityXiamen 361102China Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen 318055China Center for Turbulence Research Stanford UniversityStanfordCA 94305USA Eastern Institute for Advanced Study Eastern Institute of TechnologyNingbo 315200China Department of Ocean Science and Center for Ocean Research in Hong Kong and MacaoThe Hong Kong University of Science and TechnologyHong Kong 999077China Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin School of Environmental Science&EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Geography and Tourism Huizhou UniversityHuizhou 516007China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China Faculty of Science and Engineering Southern Cross UniversityLismoreNew South Wales 2480Australia CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China

Coastal ecosystems are known for their ability to sequester organic carbon(OC),termed“blue carbon”.The molecular composition of dissolved organic matter(DOM)can affect sediment OC content;however,the impact of benthic bioturbation on DOM properties and OC storage stability is not well *** study examined the effects of bio-turbation by fiddler crabs on DOM molecular properties and OC storage stability along the Chinese *** findings indicate that crab bioturbation enhanced the release of labile molecules by 59%on *** increase is controlled by the coupling reactions of iron and manganese minerals,and is influenced by climatic ***,fiddler crab bioturbation diminishes the durability of blue carbon storage,with the most significant effects observed in mangrove forests,followed by bare mudflats,tidal creek banks,and *** results underscore the critical role of benthic bioturbation in global blue carbon budgets.

关键词： blue carbon crab bioturbation Fe and Mn minerals climate change molecular level continental scale

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