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SSRN 2024年

作者： Zhang, Jingyi Li, Weiguang Guo, Xinming Zhang, Xinran Wang, Xuhui Lv, Longyi State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin150090 China School of Environment Harbin Institute of Technology Harbin150090 China School of Environmental Science and Engineering Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Sun Yat-sen University Guangzhou510275 China Tianjin Key Laboratory of Clean Energy and Pollution Control School of Energy and Environmental Engineering Hebei University of Technology Tianjin300401 China

The benefits of combined chlorine and UV processes (the Cl2-UV, UV/Cl2, and UV-Cl2 processes) in controlling antibiotic resistance have been acknowledged. However, there has been a lack of studies systematically comparing the effectiveness of these processes in controlling antibiotic resistance in actual water bodies, leading to an absence of guidance on selecting the most suitable method for practical applications. Therefore, the efficacies of these three processes in controlling antibiotic resistance were evaluated. All three processes achieved a greater than 98% inactivation rate of culturable antibiotic-resistant bacteria (ARB), with the UV/Cl2 process exhibiting slightly inferior performance. The UV/Cl2 process, with a chlorine dosage of 2 mg·L-1 and UV fluence of 25 mJ·cm-2, demonstrated superior removal and lower enrichment of antibiotic resistance genes (ARGs) compared to the other processes. Additionally, the log removal values and the degree of enrichment of ARGs for the three processes significantly correlated with the amplicon G+C content, particularly evident in the UV/Cl2 process. Furthermore, considering the pathogenicity of potential ARG hosts and the association of ARGs with the intI1 gene, ARGs following the UV/Cl2 process may pose less of a health risk than the remaining two processes. © 2024, The Authors. All rights reserved.

关键词： Health risks

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Industrial-Scale Highly Efficient Nickel Recovery from Electroplating Wastewater Using Resin Adsorption Followed by Aeration Mixing Acid Regeneration

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SSRN 2023年

作者： Li, Tong Ji, Xianhua Wang, Dongsheng Zhang, Qianxin Zhang, Menghan Yu, Gang Deng, Shubo State Key Joint Laboratory of Environment Simulation and Pollution Control Beijing Key Laboratory for Emerging Organic Contaminants Control School of Environment Tsinghua University Beijing100084 China Jiangsu Jingyuan Environmental Protection Co. Ltd. Jiangsu Nantong226000 China Advanced Interdisciplinary Institute of Environmental and Ecology Beijing Normal University Zhuhai519000 China

Cation-exchange resins have been widely used to recover nickel from electroplating wastewater, while resin regeneration often consumes a large amount of acid and alkali, resulting in low nickel concentrations in regeneration solution. In this study, the industrial-scale nickel recovery from electroplating wastewater using resin adsorption and regeneration was investigated. Two cation-exchange resin tanks and one chelated resin tank in series effectively reduced the nickel concentrations to below 0.1 mg/L, meeting the strictest nickel discharge standard. The spent resin could be efficiently regenerated by a novel aeration mixing method, which greatly reduced acid and alkali consumption in comparison with the traditional downstream regeneration method, and the acid utilization ratio was 99.9%. The spent resin was regenerated by 4% - 7.2% (w/w) HCl eluent, and 2 bed volume (BV) of 6% HCl showed the better regeneration, achieving high nickel concentration and acid utilization. More than 60 g/L of nickel ions in regeneration solution was stably obtained by synergistically controlling the concentration and volume of eluent and enhancing mass transfer by aeration, which benefited the subsequent nickel recovery by electrodeposition, and the regeneration time was greatly reduced to 2-3 h. Similarly, H2SO4 was also effective for nickel desorption from the spent resins. This study provided an effective resin regeneration method to consume less regenerant and obtain high nickel concentrations, making the nickel recovery cost-effective. © 2023, The Authors. All rights reserved.

关键词： Mixing

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Titanium Xerogel as a Potential Alternative for Polymeric Ferric Sulfate in Coagulation Removal of Antimony from Reverse Osmosis Concentrate

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SSRN 2022年

作者： Wu, Bingdang Li, Jingbiao Gan, Yonghai Hang, Zhihao Li, Haojie Zhang, Shujuan State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University 210023 China

Reverse osmosis (RO) is a useful process for water purification or water reuse. Nevertheless, the generated RO concentrate may adversely affect the environment if not properly treated. Coagulation with polymeric ferric sulfate (PFS) is a widely used method for the treatment of antimony (Sb)-containing RO concentrate. However, the PFS coagulation is still suffering from high residual metal and turbidity. Herein, a titanium xerogel coagulant (TXC) was evaluated as an alternative for PFS to remove Sb from RO concentrate. The RO concentrate collected from a local textile factory had an initial Sb concentration of 806 μg/L, a turbidity less than 1 NTU, and a high conductivity (5.3 mS/cm). With TXC as the coagulant, the residual Sb concentrations met the direct discharge limit (50 μg/L) at all the tested conditions (pH: 3.0–9.0, dosage: 40–100 mg/L). Based on the analyses with potentiometric titrations, X-ray photoelectron spectroscopy, and X-ray diffraction pattern, the binding states between Sb and the flocs of TXC and PFS were investigated. The results reveal that sweep flocculation dominated in the removal of Sb by TXC, whereas charge neutralization played a major role in Sb removal by PFS. As a result, TXC coagulation was robust in a wide pH range and was less sensitive to organic matter. The work here provides a promising approach for the treatment of RO concentrate. © 2022, The Authors. All rights reserved.

关键词： Coagulation

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Continuous Adsorption Removal of Trace Lead from Drinking Water in a Functionalized Activated Carbon Fibers Fixed Bed Column

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SSRN 2024年

作者： Zuo, Qi Zheng, Hong Zhang, Pengyi Zhang, Yu Zhang, Jiejing Zhang, Baichao Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences Beijing100083 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

Functionalized activated carbon fibers (ACFs) have good application prospects for eliminating trace heavy metals ions from water. Continuous removal in a fixed bed is preferred and supposed industrially feasible for the elimination of various pollutants in comparison to batch operation. Herein, the dynamic adsorption performance of ACFs pretreated using hydrogen peroxide and further functionalized by polydopamine (PDA/OACF) for trace Pb(II) ions was evaluated using a continuously operating fixed-bed adsorption device, and its adsorption behavior for trace Pb(II) ions was investigated at different bed heights, flow rates and influent lead ions concentrations. 0.6 g PDA/OACF could purify over127.80 L (22421 BVs) deionized water containing 150 μg L-1 Pb(II) ions and ensure the effluent concentration to meet WHO safe drinking water standard at 6 cm bed height and 5 mL min-1 flow rate. Four models including Thomas, Adams-Bohart, Yoon-Nelson and BDST models could fit the dynamic adsorption data well. The actual drinking water containing trace lead could also be efficiently purified and 0.6 g PDA/OACF could purify about 44 L (7719 BVs) tap water containing 150 μg L-1 Pb(II) by adding manganese sand filter media at the front end of the PDA/OACF fixed-bed. PDA/OACF shows superior cost competitiveness and good application prospect in the purification of drinking water. © 2024, The Authors. All rights reserved.

关键词： Potable water

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Growth of BaTaO2N-BaNa0.25Ta0.75O3 Solid Solution Photocatalyst for Visible Light-Driven Z-Scheme Overall Water Splitting

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能源材料前沿（英文） 2023年第3期2023卷 185-192页

作者： Ying Luo Qiaoqi Guo Jun Xu Hanghang Zhou Zheng Wang Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

BaTaO2N with intense visible light absorption has been demonstrated as a promising photocatalyst for Z-scheme overall water splitting,whereas the photocatalytic activity of BaTaO2N is still restricted by strong charge recombination at structural ***,we present the direct growth of BaTaO2N-BaNa0.25Ta0.75O3 solid solution from a lattice-matched BaNa0.25Ta0.75O3 precursor through volatilization of Na species during a nitridation *** method promotes the direct phase transformation from BaNa0.25Ta0.75O3 to BaTaO2N to inhibit the formation of defect *** a result,the as-obtained BaTaO2N-BaNa0.25Ta0.75O3 solid solution shows greatly enhanced activity compared to the conventional BaTaO2N,regardless of photocatalytic H2 evolution in the presence of methanol or Z-scheme overall water *** study provides a facile method to construct(oxy)nitride-based solid solution photocatalysts with low defect density for efficient solar hydrogen production from water splitting.

关键词： z-scheme solution growth solid water bana batao light-driven overall photocatalyst

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New Insight into Opposite Oxidation Behavior in Acetone and Propane Catalytic Oxidation Over Comn Based Spinel Oxides

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SSRN 2023年

作者： Shan, Cangpeng Zhang, Yan Zhao, Qian Li, Jianbo Wang, Yunchong Han, Rui Liu, Caixia Liu, Qingling Tianjin Key Lab of Indoor Air Environmental Quality Control School of Environmental Science and Technology Tianjin University Tianjin300350 China State Key Laboratory of Engines Tianjin University Tianjin300350 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China

CoMn spinel (CoMn) and Zn-substituted CoMn spinel (ZnCoMn) oxides were fabricated for revealing mechanism differences in acetone and propane catalytic oxidation. The temperature-conversion profiles, intrinsic reaction rate and activation energy convinced that CoMn and ZnCoMn exhibited high catalytic performance for acetone and propane oxidation, respectively. Experimental and theoretical investigation revealed that deep oxidation determined the acetone conversion, while the degradation of propane was governed by the fracture of C-H bond and subsequently the activation of C3H7. CoMn possessed more active lattice oxygen and superior oxygen activation capacity, allowing acetone to be directly converted into carboxylates without generating aldehydes. ZnCoMn with more high valence Mn species was conductive to the C-H bond dissociation and C3H7 activation. This work revealed the mutual relations between structure-property of the spinel oxides and reactivity of the diverse VOCs, which provided new insights for the rational design of spinel oxides for catalytic oxidation of diverse VOCs. © 2023, The Authors. All rights reserved.

关键词： Acetone

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Surface catalytic degradation of ciprofloxacin by ferrihydrite sulfidation under ambient conditions

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environmental pollution 2025年 371卷 125945页

作者： Chen, Xiru Bai, Lihua Li, Hongjian Wang, Xinhao Wang, Chao Fang, Yanfen Gu, Cheng State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China Key Laboratory of Environmental Remediation and Ecological Health Ministry of Industry and Information·Technology Jiangsu Province Ecology and Environment Protection Engineering Research Center of Groundwater Pollution Prevention and Control Jiangsu Environmental Engineering Technology Co. Ltd. Nanjing210019 China College of Materials and Chemical Engineering China Three Gorges University Hubei Yichang443002 China

Dissolved sulfide (S(-II)) is abundant in sediments and capable of initiating the sulfidation reactions of iron-bearing minerals, in which the reaction mechanisms have been well documented. However, the impact of the S(-II)/Fe concentration ratio on reactive oxygen species (ROS) formation and the fate of co-existing contaminants upon iron-bearing minerals sulfidation under ambient conditions remains inadequately explored. Herein, the transformation of ciprofloxacin (CIP) by ferrihydrite sulfidation under ambient conditions was systematically investigated. Our findings indicated that the rate of CIP degradation initially increased with rising S(-II)/Fe concentration ratios, but subsequently decreased as the ratio continued to elevate. Evidence from electron paramagnetic resonance, molecular probing and quenching experiments revealed that the superoxide anion radical (O2•-), primarily produced from the reaction between O2 and surface-bound Fe(II), was the dominant contributor to the accelerated transformation of CIP. Upon being attacked by ROS, CIP underwent degradation via carboxyl substitution, defluorination, hydroxylation, piperazine ring ketonization and piperazine ring cleavage. Additionally, common water quality factors, i.e., pH, natural organic matter (NOM) and inorganic anions could also significantly influence the degradation processes of CIP during ferrihydrite sulfidation under ambient conditions. This research offers valuable insights into the significant function of mineral sulfidation in facilitating the formation and reactivity of ROS, which sheds light on enhanced elimination of organic contaminants in sediments. © 2025 Elsevier Ltd

关键词： Reactive oxygen species

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Enhancing biological conversion of NO to N2O by utilizing thermophiles instead of mesophiles

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Chemosphere 2024年 350卷

作者： Li, Dan Sun, Zhuqiu Luo, Ga Lu, Lichao Zhang, Shaobo Xi, Jinying Environmental Simulation and Pollution Control State Key Joint Laboratory School of Environment Tsinghua University Beijing100084 China School of Environmental Science and Engineering Yancheng Institute of Technology Yancheng 224051 China School of Petrochemical Engineering and Environment Zhejiang Ocean University Zhoushan316004 China Beijing Capital Sludge Disposal Technology Co. LTD Beijing100044 China

The production of nitrous oxide (N2O) through the biological denitrification of nitric oxide (NO) from flue gases has recently been achieved. Although the temperature of flue gas after desulphurization is usually 45–70 °C, all previous studies conducted microbial denitrification of NO under mesophilic conditions (22–35 °C). This study investigated the biological conversion of NO to N2O in both mesophilic (35–45 °C) and thermophilic conditions (45–50 °C). The results showed that temperature has a great impact on N2O production, with a maximum conversion efficiency (from NO to N2O) of 82% achieved at 45 °C, which is obviously higher than the reported conversion efficiencies (24–71%) under mesophilic conditions. Additionally, high-throughput sequencing result showed that the genera Enterococcus, Clostridium, Romboutsia, and Streptococcus were closely related to NO denitrification and N2O production. Microbial communities at 40 and 45 °C had greater metabolizing capacities for polymeric carbon sources. This study suggests that thermophilic condition (45 °C) is more suitable for biological production of N2O from NO. © 2023 Elsevier Ltd

关键词： Nitric oxide

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Non-deterministic multi-level model for planning water-ecology nexus system under climate change

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Cell Reports Sustainability 2024年第3期1卷

作者： Ma, Yuan Li, Yongping Wang, Hao Zhang, Yufei Zhou, Yanxiao Huang, Guohe State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China Institute for Energy Environment and Sustainable Communities University of Regina Regina S4S 7H9 SK Canada

Water scarcity and ecological degradation impede sustainable development in Central Asia, which urgently calls for synergistic planning of water-ecology (WE) nexus system. However, existing management models may have large uncertainties, restricting their effectiveness. Here, we develop a copula-based flexible fuzzy multi-level programming (CFMP) method, which tackles uncertainties, such as water demands, and balances trade-offs among competing managers in top-down decision-making processes. Next, we formulate a CFMP-WE model for Central Asia (2021–2050), considering objectives of economic development, food security, and ecological restoration, and design 243 planning scenarios. We found that ecological water allocation would account for 5.9%–12.2% to support sustainable development;however, policymakers need to reduce agricultural water allocation, forgoing 7.8%–20.1% of the system benefit (i.e., economic benefit for WE nexus system). Agricultural water use would still be the largest (with 25.6%–29.4% for cereal crops to ensure food security), but its share would decline to conserve water for users like industry. © 2024 The Authors

关键词： Central Asia climate change copula-based programming multi-level programming multi-uncertainty sustainability water-ecology

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Biostimulated Detoxication of 1,1,2-Tca - Contaminated Groundwater by Nano-Emulsified Vegetable Oil：A Pilot Scale Study

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SSRN 2023年

作者： Zhao, Ke Yang, Lu Zhang, Yun Hou, Jinyu Wang, Qingling Qi, Peishi Christie, Peter Liu, Wuxing Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences Nanjing210018 China State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control Nanjing Institute of Environmental Sciences MEE Nanjing210042 China State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin150090 China

Groundwater contamination with 1,1,2-trichloroethane (1,1,2-TCA) is of considerable concern and bioremediation is an environmentally friendly, low-carbon and sustainable option that is considered to effectively eliminate the threat from 1,1,2-TCA. High-stability and high-concentration nano emulsified vegetable oil (nanoEVO) was prepared by a modified phase inversion composition (PIC) method with low energy consumption. The droplet diameter and PdI of nanoEVO were 212.8 nm and 0.105, respectively, after storage for one year at room temperature. The nanoEVO was used in pilot-scale biostimulation experiments. In the 125-L pilot-scale bioreactor, nanoEVO-based biostimulant stimulated indigenous bacteria in 1,1,2-TCA - contaminated groundwater to dechlorinate 1,1,2-TCA (initial concentration 363.33 μM) into ethene via vinyl chloride (VC) in 30 days. The dihaloelimination from 1,1,2-TCA to VC was insensitive to the TOC and the hydrogenolysis from VC to ethene can be carried out only at a higher TOC concentration (~ 70 mg L-1). Biostimulation comprised hydrolysis and acidogenesis led by Paludibacter, Lentimicrobium, and unclassified_Spirochaetaceae, and unclassified_Rikenellaceae and unclassified_Cloacimonadaceae participated in acetogenesis to relieve the toxic accumulation of electron sinks (lactate, propionate and butyrate) during fermentation. Moreover, Trichlorobacter, Sulfurospirillum and Dehalococcoides actied as dechlorinators, with syntrophic cooperation by multiple bacterial taxa leading to efficient and stable detoxification of 1,1,2-TCA to ethene. © 2023, The Authors. All rights reserved.

关键词： Bacteria

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