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Highly stable carbon-coated nZVI composite Fe0@RF-C for efficient degradation of emerging contaminants

Environmental Science and Ecotechnology 2024年第6期22卷 233-244页

作者： Guizhou Xu Lin Sun Yizhou Tu Xiaolei Teng Yumeng Qi Yaoyao Wang Aimin Li Xianchuan Xie Xueyuan Gu State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing210023China Key Laboratory of Poyang Lake Environment and Resource Utilization Engineering Research Center of Watershed Carbon NeutralizationMinistry of EducationSchool of Resource and EnvironmentNanchang UniversityNanchang330031China Nanjing University&Yancheng Academy of Environment Protection Technology and Engineering Nanjing210023China Jiangxi Nanxin Environmental Protection Technology Co.LTD Jiujiang CityJiangxi Province330300China

Nanoscale zerovalent iron(nZVI)has garnered significant attention as an efficient advanced oxidation activator,but its practical application is hindered by aggregation and *** nZVI with carbon can effectively addresses these issues.A simple and scalable production method for carbon-coated nZVI composite is highly *** anti-oxidation and catalytic performance of carbon-coated nZVI composite merit in-depth *** this study,a highly stable carbon-coated core-shell nZVI composite(Fe0@RF-C)was successfully prepared using a simple method combining phenolic resin embedding and carbothermal ***0@RF-C was employed as a heterogeneous persulfate(PS)activator for degrading 2,4-dihydroxybenzophenone(BP-1),an emerging *** to commercial nZVI,Fe0@RF-C exhibited superior PS activation performance and oxidation *** 95%of BP-1 was removed within 10 min in the Fe0@RF-C/PS *** carbon layer promotes the enrichment of BP-1 and accelerates its degradation through singlet oxygen oxidation and direct electron transfer *** study provides a straightforward approach for designing highly stable carbon-coated nZVI composite and elucidates the enhanced catalytic performance mechanism by carbon layers.

关键词： Nanoscale zerovalent iron Carbon-coated nZVI Persulfate BP-1 Enhanced degradation

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Microplastics in landfill leachate:Sources,detection,occurrence,and removal

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Environmental Science and Ecotechnology 2023年第4期16卷 26-37页

作者： Mosarrat Samiha Kabir Hong Wang Stephanie Luster-Teasley Lifeng Zhang Renzun Zhao Department of Nanoengineering North Carolina Agricultural and Technical State UniversityGreensboroNC27411USA State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092China Civil Architectural and Environmental Engineering DepartmentNorth Carolina Agricultural and Technical State UniversityGreensboroNC27411USA

Due to the accumulation of an enormous amount of plastic waste from municipal and industrial sources in landfills,landfill leachate is becoming a significant reservoir of *** release of microplastics from landfill leachate into the environment can have undesirable effects on humans and *** study provides the state of the science regarding the source,detection,occurrence,and remediation of microplastics in landfill leachate based on a comprehensive review of the scientific literature,mostly in the recent *** waste and wastewater treatment residue are the primary sources of microplastics in landfill *** concentration in raw and treated landfill leachate varied between 0-382 and 0-2.7 items L^(−1).Microplastics in raw landfill leachate are largely attributable to local plastic waste production and solid waste management ***,polystyrene,and polypropylene are the most prevalent microplastic polymers in landfill *** though the colors of microplastics are primarily determined by their parent plastic waste,the predominance of light-colored microplastics in landfill leachate indicates long-term *** identified morphologies of microplastics in leachate from all published sources contain fiber and fragments the *** on the treatment method,leachate treatment processes can achieve microplastic removal rates between 3%and 100%.The review also provides unique perspectives on microplastics in landfill leachate in terms of remediation,final disposal,fate and transport among engineering systems,and source reduction,*** landfill-wastewater treatment plant loop and bioreactor landfills present unique difficulties and opportunities for managing microplastics induced by landfill leachate.

关键词： Landfill leachate Microplastics Source Detection Occurrence Treatment

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Study on the Different Photocatalytic Performances for Tetracycline Hydrochloride Degradation of p-block Metal Composite Oxides Sr_(1.36)Sb_(2)O_6 and Sr_(2)Sb_(2)O_7

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Chinese Journal of Structural Chemistry 2021年第3期40卷 394-402,275页

作者： HUANG Yi-Wei MAO Jing-Yun QIAN Qing-Rong XUE Hun LIU Yan-Ru College of Environmental Science and Engineering Fujian Key Laboratory of Pollution Control&Resource ReuseFujian Normal UniversityFuzhou 350007China College of Life Sciences Fujian Normal UniversityFuzhou 350117China

p-block metal composite oxides Sr_(1.36)Sb_(2)O_(6) and Sr_(2)Sb_(2)O_(7) synthesized by a hydrothermal method as photocatalysts in the degradation of tetracycline hydrochloride under UV light irradiation have been extensively *** effects of synthesis conditions on the photocatalytic activity were *** Sr_(1.36)Sb_(2)O_(6)-100°C-24 h-5 and Sr_(2)Sb_(2)O_(7)-150℃-24 h^(-2) samples prepared under optimal conditions exhibited remarkably different photocatalytic *** essential factors influencing the difference of photocatalytic performance were *** results showed that the different photocatalytic activities observed for Sr_(1.36)Sb_(2)O_(6)and Sr_(2)Sb_(2)O_(7) could be attributed to their different electronic and crystal *** work will provide a new perspective for the screening and design of p-block metal composite oxide photocatalysts to enhance the removal of organic pollutants in the environment.

关键词： p-block metal composite oxide Sr_(1.36)Sb_(2)O_(6) Sr_(2)Sb_(2)O_(7) photocatalytic tetracycline hydrochloride

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Hybrid energy harvesting systems for self-powered sustainable water purification by harnessing ambient energy

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Frontiers of Environmental Science & Engineering 2023年第10期17卷 1-16页

作者： Zhengyang Huo Young Jun Kim Yuying Chen Tianyang Song Yang Yang Qingbin Yuan Sang Woo Kim School of Environment and Natural Resources Renmin University of ChinaBeijing 100872China School of Advanced Materials Science and Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Institute of Scientific and Technical Information of China Beijing 100038China

The development of self-powered water purification technologies for decentralized applications is crucial for ensuring the provision of drinking water in resource-limited regions. The elimination of the dependence on external energy inputs and the attainment of self-powered status significantly expands the applicability of the treatment system in real-world scenarios. Hybrid energy harvesters, which convert multiple ambient energies simultaneously, show the potential to drive self-powered water purification facilities under fluctuating actual conditions. Here, we propose recent advancements in hybrid energy systems that simultaneously harvest various ambient energies (e.g., photo irradiation, flow kinetic, thermal, and vibration) to drive water purification processes. The mechanisms of various energy harvesters and point-of-use water purification treatments are first outlined. Then we summarize the hybrid energy harvesters that can drive water purification treatment. These hybrid energy harvesters are based on the mechanisms of mechanical and photovoltaic, mechanical and thermal, and thermal and photovoltaic effects. This review provides a comprehensive understanding of the potential for advancing beyond the current state-of-the-art of hybrid energy harvester-driven water treatment processes. Future endeavors should focus on improving catalyst efficiency and developing sustainable hybrid energy harvesters to drive self-powered treatments under unstable conditions (e.g., fluctuating temperatures and humidity).

关键词： Piezocatalysis Solar energy Waste heat Decentralized water treatment Point-of-use Nanogenerator

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基于文献回顾的有色金属冶炼废渣的特征、资源化途径及其安全利用评价

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Journal of Central South University 2024年第4期31卷 1178-1196页

作者：徐则林姚佳斌付融冰 Centre for Environmental Risk Management and Remediation of Soil and Groundwater Tongji UniversityShanghai 200092China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

冶炼废渣作为冶炼过程中产生的工业副产物,由于其缺乏安全、合理的防护和管理措施可能导致环境问题。通过全面分析近年来发表的相关文献,本文对有色金属冶炼废渣的特性、资源化利用途径及安全利用评价等方面的最新研究进展进行了介绍。... 详细信息

冶炼废渣作为冶炼过程中产生的工业副产物,由于其缺乏安全、合理的防护和管理措施可能导致环境问题。通过全面分析近年来发表的相关文献,本文对有色金属冶炼废渣的特性、资源化利用途径及安全利用评价等方面的最新研究进展进行了介绍。研究结果表明,不同的原生精矿、冶炼条件和冶炼类型决定了冶炼废渣的化学和矿物学特征。此外,冶炼废渣在各种资源化利用中表现出极高的灵活性,不仅可以用于金属回收和建筑材料,还可以作为农业肥料和修复剂。同时,本文强调了在各种利用情景下对废渣进行安全性评估的重要性,以降低其潜在环境风险。此外,本文还强调了未来的研究方向,包括建立一种综合且量化的土渣混合体中重金属环境风险评价方法,以及探索更多创新的冶炼废渣资源化利用方法。综上所述,本文对于推动冶炼废渣在环境保护和资源可持续利用方面的研究有重要意义。

关键词：冶炼废渣有色金属废渣特征资源化利用途径安全利用评价

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Improved atmospheric mercury simulation using updated gas-particle partition and organic aerosol concentrations

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Journal of Environmental Sciences 2022年第9期34卷 106-118页

作者： Kaiyun Liu Qingru Wu Shuxiao Wang Xing Chang Yi Tang Long Wang Tonghao Liu Lei Zhang Yu Zhao Qin’geng Wang Jinsheng Chen State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Institute of Atmospheric Environment Guangdong provincial academy of environmental scienceGuangzhou 510045China China National Environmental Monitoring Centre Beijing 100012China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing210023China Center for Excellence in Regional Atmos.Environ. Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

The gaseous or particulate forms of divalent mercury(HgⅡ) significantly impact the spatial distribution of atmospheric mercury concentration and deposition flux(FLX). In the new nested-grid GEOS-Chem model, we try to modify the HgⅡ gas-particle partitioning relationship with synchronous and hourly observations at four sites in China. Observations of gaseous oxidized Hg(GOM), particulate-bound Hg(PBM), and PM 2.5 were used to derive an empirical gas-particle partitioning coefficient as a function of temperature( T) and organic aerosol(OA) concentrations under different relative humidity(RH). Results showed that with increasing RH, the dominant process of HgⅡ gas-particle partitioning changed from physical adsorption to chemical desorption. And the dominant factor of HgⅡ gas-particle partitioning changed from T to OA concentrations. We thus improved the simulated OA concentration field by introducing intermediate-volatility and semi-volatile organic compounds(I/SVOCs) emission inventory into the model framework and refining the volatile distributions of I/SVOCs according to new filed tests in the recent literatures. Finally, normalized mean biases(NMBs) of monthly gaseous element mercury(GEM), GOM, PBM, WFLX were reduced from-33%–29%, 95%–300%, 64%–261%, 117%–122% to-13%–0%,-20%–80%,-31%–50%,-17%–23%. The improved model explains 69%–98% of the observed atmospheric Hg decrease during 2013–2020 and can serve as a useful tool to evaluate the effectiveness of the Minamata Convention on Mercury.

关键词： Nested GEOS-Chem model HgⅡgas-particle partitioning Organic aerosol Atmospheric mercury Mercury deposition flux

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New insights into different surfactants’impacts on sludge fermentation:Focusing on the particular metabolic processes and microbial genetic traits

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Frontiers of Environmental Science & Engineering 2022年第8期16卷 221-234页

作者： Jingyang Luo Shiyu Fang Wenxuan Huang Feng Wang Le Zhang Fang Fang Jiashun Cao Yang Wu Dongbo Wang Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of EducationHohai UniversityNanjing 210098China College of Environment Hohai UniversityNanjing 210098China State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China College of Environmental Science and Engineering Hunan UniversityChangsha 410082China

Surfactants were expected to exhibit positive effects on the waste activated sludge(WAS)***,the systematic comparison of different categories of surfactants on the WAS fermentation and the functional mechanisms,especially microbial metabolic traits,have not yet been precisely *** study revealed the positive effects of different surfactants on the volatile fatty acid(VFA)production,which followed the order of alkyl polysaccharides(APG)>sodium dodecylbenzene sulfonate(SDBS)>hexadecyl trimethyl ammonium bromide(HTAB).Mechanistic exploration found that the presence of different surfactants improved solubilization and hydrolysis steps,and then contributed to the subsequent acidification with different *** functional microorganisms associated with VFA generation were enriched in surfactant-conditioned *** analysis further indicated that the key genes involved in the particular process of VFA generation were *** simultaneous bioavailable substrate improvement,functional bacterial enrichment,and metabolic activity upregulation induced by different surfactants jointly contributed to VFA promotion during WAS *** study could provide a comprehensive realization of surfactants’impacts on theWAS fermentation process,and more importantly,it reminded the public to discern the distinct interplaying effects induced by different chemicals in regulating the WAS disposal and resource recovery.

关键词： Waste activated sludge(WAS) Volatile fatty acids(VFA) Surfactant types Functional microorganisms Metabolic activity upregulation

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Resistance of Biological Magnetic Ion Exchange Resin to Norfloxacin on the Advanced Treatment of Wastewater

SSRN

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SSRN 2024年

作者： Han, Liqin Shan, Cong Shuang, Chendong Xu, Shanshan Zhou, Qing Ji, Rong Li, Aimin Pan, Yang State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

In this work, a biological magnetic anion exchange (B-MAEX) system was established for removal of dissolved organic carbon (DOC) and triclosan in advanced treatment of wastewater. Activated sludge (AS) system was employed for comparison in the same experimental conditions. In AS system, the presence of norfloxacin had no significant impact on DOC removal at concentrations below 5.00 mg/L. But DOC removal decreased from 43±8% to 16±5% as norfloxacin concentration increased from 5.00 to 50.00 mg/L. Triclosan removal was found to be more susceptible to norfloxacin compared to DOC removal, with the removal decreasing from 22±8% to 12±8% as norfloxacin concentration increased from 0.05 to 0.50 mg/L. Further reduction in triclosan removal to 3±5% was observed with norfloxacin raised to 50.00 mg/L. In contrast to the AS system, the B-MAEX system demonstrated significantly enhanced removal of both DOC and triclosan at equivalent norfloxacin concentrations. With norfloxacin increasing from 5.00 to 50.00 mg/L, DOC removal dropped from 71±12% to 60±11%. Triclosan removal decreased from 70±5% to 64±6% when norfloxacin concentration increased from 0.50 to 5.00 mg/L. Even at norfloxacin concentration of 50.00 mg/L, triclosan removal remained 61±12%. The enhanced resistance of the B-MAEX system to norfloxacin could be attributed primarily to its elevated biological activity and a more diverse microbial community, suggesting the potential application on the advanced wastewater treatment. © 2024, The Authors. All rights reserved.

关键词： Ion exchange resins

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A Novel Self-Sourced Extracellular Polymeric Substances-Doped Residual Sludge-Based Biochar Loaded with Nano Zero-Valent Iron Reinforces Anaerobic Digestion Methanogenesis: Performance and Community Structure Succession

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SSRN 2024年

作者： Li, Jibin Wu, Siqi Zhang, Weiming Pan, Bingcai Hua, Ming State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China

Anaerobic digestion is an effective wastewater energization technology, but suffers from low energy conversion efficiency. In this study, a novel composite of extracellular polymeric substances-doped residual sludge-based biochar loaded with nano zero-valent iron (NZVI@EPSBC) was successfully prepared, which had a significant promotion effect on anaerobic digestion methanogenesis. In comparison to the control, the methane yield with 100 mg/L NZVI@EPSBC was raised by approximately 1.4-fold. The NZVI@EPSBC did not significantly change the morphology of the inoculated granular sludge, but induced the secretion of proteins and humic substances in the extracellular EPS, which are beneficial for carbon conversion and extracellular electron transport at the microscopic scale. Meanwhile, the quantitative analysis of the electron transport system also confirmed that NZVI@EPSBC could significantly improve the electron transfer efficiency in microbial respiratory chain throughout the experimental cycle, in which the highest respiratory efficiency increase of 26.51% at 48 h. Taxonomic analysis of microbial communities showed that NZVI@EPSBC exhibited complete retention of bacteria and archaea compared to the raw sludge, while realizing an efficient cooperative pattern of syntrophic bacteria by regulating the relative abundance of specific functional bacteria, like Anaerolineaceae and Methanosaeta. Overall, the study offers a valuable strategy for achieving resourcefulness of residual sludge and extracellular polymeric substances along with facilitating efficient energy recovery from wastewater. © 2024, The Authors. All rights reserved.

关键词： Anaerobic digestion

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铜基催化剂用于一氧化碳电还原为多碳产品

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Science China Materials 2024年第6期67卷 1684-1705页

作者：赵雯刘娟王光滔王新天杨传举李剑王鋙葶孙晓莲林日琛左淦丞朱文磊 State Key Laboratory of Pollution Control and Resource Reuse Frontiers Science Center for Critical Earth Material CyclingState Key Laboratory of Pollution Control and Resource Reusethe Frontiers Science Center for Critical Earth Material CyclingSchool of the EnvironmentNanjing UniversityNanjing 210023China State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China State Key Laboratory of Natural Medicines Key Laboratory of Drug Quality Control and PharmacovigilanceSchool of PharmaceuticsChina Pharmaceutical UniversityNanjing 210009China Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 211189China Jiangsu Engineering Lab of Water and Soil Eco-remediation School of EnvironmentNanjing Normal UniversityNanjing 210023China

电化学二氧化碳还原(ECO_(2)R)是一种将碳和可再生能源的能量储存在多碳产品(C_(2+))的化学键中的有效途径.然而,反应涉及的复杂步骤为CO_(2)直接转化为C_(2+)设置了巨大的障碍.一种利用CO作为“中转站”,通过串联ECO_(2)R和电化学CO还... 详细信息

电化学二氧化碳还原(ECO_(2)R)是一种将碳和可再生能源的能量储存在多碳产品(C_(2+))的化学键中的有效途径.然而,反应涉及的复杂步骤为CO_(2)直接转化为C_(2+)设置了巨大的障碍.一种利用CO作为“中转站”,通过串联ECO_(2)R和电化学CO还原(ECOR)以提高生产C_(2+)的选择性和反应速率的策略引起了人们的广泛关注.本文总结了铜基电催化剂在ECOR中催化特定C_(2+)生成的设计策略.其次,从各个方面总结了催化剂工程的代表性设计策略,并介绍了电解反应器改进方面的最新进展.最后,阐述了该研究领域面临的主要挑战和未来前景.这些见解和观点将为铜基电催化剂的设计提供有益指导.

关键词： CO electroreduction Cu-based catalysts multi-car-bon products

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