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High-efficiency and selective lead capture using thermally regenerable MOF-based adsorbent: Role of thermoresponsive polymer

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Journal of Hazardous Materials 2025年 495卷 138875页

作者： Ji, Chenghan Guo, Jiahe Wang, Zhulai Zhou, Jie Zhang, Weiming College of Civil Engineering Nanjing Forestry University Nanjing 210037 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210023 China Jiangsu Carbon Sequestration Materials and Structural Technology of Bamboo & Wood Research Center China School of Accounting Nanjing University of Finance and Economics Nanjing 210023 China

The development of innovative materials for selective lead (Pb) capture is crucial, but regeneration research is insufficient, particularly regarding regeneration without chemical reagents. Herein, we introduce a smart, thermally regenerable MOF-based adsorbent for Pb^{2 +} by incorporating poly(N-isopropylacrylamide) (pNIPAM) and benzo-18-crown-6 ether (B18C6) into MOF-808 (MOF-808-pNB). MOF-808-pNB could capture Pb²⁺ with remarkable removal efficiency (> 99.7 %), ultrafast kinetics (k2 ∼ 14.95 g mg⁻¹ min⁻¹), and outstanding selectivity (Kd > 1.6 × 10⁶ mL g⁻¹) in multi-ion mixed solutions (e.g., Li⁺, Ca²⁺, Ba²⁺, Cu²⁺, Ni²⁺). Importantly, this material could be easily regenerated at 45°C, showing excellent recyclability (Pb²⁺ adsorption and desorption ∼ 99 % after 10 cycles). Column experiments demonstrated that 1 kg material could treat 3250 L of authentic Pb-contained wastewater to meet drinking water standards (Pb < 0.01 mg/L). Mechanism studies indicate that B18C6 within the material acts as a specific site for capturing Pb²⁺ at 25°C, whereas pNIPAM shrinks thermoresponsively to a hydrophobic state at 45°C. These alterations introduce steric hindrance and repulsion, combined with exothermic properties of B18C6, collectively enabling efficient Pb²⁺ desorption. This work highlights the potential of thermoresponsive MOF-808-pNB for Pb²⁺ removal and provides a reference for the design of stimuli-responsive materials aimed at water purification.

关键词： B18C6 unit Selective lead capture Thermally regenerable adsorbent Thermoresponsive polymer Thermoreversible adsorption mechanism

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PSO-SVM optimized DBD plasma for energy-efficient degradation of sulfamethoxazole in wastewater

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Journal of Environmental Sciences 2025年

作者： Jia-Wei Song Ju-Xiang Chen Wen-Hai Chu Yu-Qiong Gao Nai-Yun Gao College of Ecology and Environment Xinjiang University Urumqi 830017 China College of Civil Engineering and Architecture Xinjiang University Urumqi 830047 China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China School of Environment and Architecture University of Shanghai for Science and Technology Shanghai 200093 China

Conventional treatment methods struggle to effectively eliminate sulfamethoxazole (SMX) from wastewater due to its persistent aromatic structure and sulfonamide moiety, while existing advanced oxidation processes often suffer from high energy consumption and inadequate degradation pathway control. This study demonstrates an advanced approach for SMX degradation in aqueous systems through dielectric barrier discharge (DBD) plasma technology synergistically integrated with COMSOL multiphysics simulation and particle swarm optimization-support vector machine (PSO-SVM) modeling. Computational simulations revealed that the DBD plasma generates a diffuse arc (D-A) mode electric field with Penning ionization effects, where primary reactive species formation predominantly occurs within the sheath layer. Under optimized operational parameters (input power: 50 W, pH 7, conductivity: 3.16 μS/cm, initial concentration: 10 mg/L, the carrier gas: air), the system achieved an exceptional SMX removal efficiency of 99.82 %, corresponding to a constant reaction rate of 0.3087 min −1 . The machine learning-optimized process simultaneously enhanced energy yield by 18.11 mg/kW·h and improved energy utilization efficiency by 15.11%. Notably, the system maintained robust performance (>75% SMX removal) in the presence of competing inorganic anions (NO 3 − , HCO 3 − and Cl − ). Mechanistic investigations combining DFT, EPR and UPLC-MS/MS elucidated that •OH, O 2 •− , 1 O 2 , •NO 2 and ONOOH preferentially attack the electrophilic N(4), N(7), and N(17) sites, initiating sequential diazotization and nitration pathways. Practical validation using hospital wastewater demonstrated significant removal of COD (56.17 %) and TOC (40.16 %), while effectively suppressing antimicrobial resistance genes. This work establishes PSO-SVM optimized DBD plasma as a sustainable and intelligent solution for pharmaceutical wastewater remediation.

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Synergistic Regulation of Anode and Cathode Interphases via an Alum Electrolyte Additive for High-Performance Aqueous Zinc-Vanadium Batteries

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Angewandte Chemie 2024年第3期137卷

作者： Lingjun He Chuyuan Lin Prof. Lingxing Zeng Dr. Fuyu Xiao Hui Lin Dr. Peixun Xiong Prof. Qingrong Qian Prof. Qinghua Chen Prof. Zhenhua Yan Prof. Jun Chen Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control & Resource Reuse College of Environmental and Resources Fujian Normal University Fuzhou Fujian 350007 China Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) State Key Laboratory of Advanced Chemical Power Sources College of Chemistry Nankai University Tianjin 300071 China Inorganic Chemistry I Technische Universität Dresden Bergstrasse 66 01069 Dresden Germany

A zinc (Zn) metal anode paired with a vanadium oxide (VO x ) cathode is a promising system for aqueous Zn–ion batteries (AZIBs); however, side reactions proliferating on the Zn anode surface and the infinite dissolution of the VO x cathode destabilise the battery system. Here, we introduce a multi-functional additive into the ZnSO 4 (ZS) electrolyte, KAl(SO 4 ) 2 (KASO), to synchronise the in situ construction of the protective layer on the surface of the Zn anode and the VO x cathode. Theoretical calculations and synchrotron radiation have verified that the high-valence Al 3+ plays dual roles of competing with Zn 2+ for solvation and forming a Zn−Al alloy layer with a homogeneous electric field on the anode surface to mitigate the side reactions and dendrite generation. The Al-containing cathode–electrolyte interface (CEI) considerably alleviates the irreversible dissolution of the VO x cathode and the accumulation of byproducts. Consequently, the Zn||Zn cell with KASO exhibits an ultra-long cycle of 6000 h at 2 mA cm −2 . Importantly, the VO x cathodes (VO 2 , V 2 O 5 and NH 4 V 4 O 10 ) in the ZS−KASO electrolyte showed excellent cycling stability, including Zn powder||VO 2 cells and Zn||VO 2 pouch cells. Even better, the full cell exhibits excellent cycling stability at low negative/positive (N/P) ratio of 2.83 and high mass loading (~16 mg cm −2 ). This study offers a straightforward and practical reference for concurrently addressing challenges at the anode and cathode of AZIBs.

关键词： Synergistic regulation Competing solvation structure Zn−Al alloy layer Vanadium cathode Inhibited dissolution

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Coupling of palladium nanoparticles with biofilm improved co-reduction of chromium(VI) and nitrate

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Chinese Journal of Chemical Engineering 2025年

作者： Chengyang Wu Siqing Xia Qiyuan Pang Suyun Xu Hongbo Liu School of Environment and Architecture University of Shanghai for Science and Technology 516 Jungong Road Shanghai China School of Intelligent Emergency Management University of Shanghai for Science and Technology 516 Jungong Road Shanghai China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University 1239 Siping Road Shanghai China

Chromium (Cr) contamination in water poses significant health risks, yet advanced remediation methods remain limited. Cr(VI) reduction catalyzed by palladium nanoparticles (PdNPs) on hydrogen-transfer membranes has shown potential but requires further optimization. This study investigated the simultaneous microbial-driven and Pd-catalyzed Cr(VI) reduction, focusing on reduction efficiency and optimal conditions. Two hydrogen-based membrane reactors were compared: a Pd-biofilm reactor incorporating PdNPs associated with a biofilm, and a control biofilm reactor. Continuous experiments demonstrated the superior performance of the Pd-biofilm reactor, achieving immediate Cr(VI) reduction and effluent Cr(III) concentrations below 0.040 mg/L, compared to 0.3 mg/L in the control biofilm reactor. High-throughput sequencing identified Dechloromonas as the dominant microbial species within Pd-biofilm, which plays a critical role in metal ion reduction. The Pd-biofilm reactor maintained high Cr(VI) reduction flux across varying conditions. When the influent Cr(VI) loading reached up to 10 mg/L, where the control biofilm reactor experienced inhibition, the Pd-biofilm reactor achieved a Cr removal of 99%. Increased nitrate loading and hydrogen pressure further enhanced Pd-biofilm reactor performance without compromising Cr(VI) reduction since Cr(VI) is the preferential electron acceptor, whereas the biofilm reactor required hydrogen pressures ≥15 psig for similar results. The optimal pH range for Cr(VI) reduction was 5.0–8.0 in the Pd-biofilm reactor and 7.0 in the biofilm reactor, with alkaline conditions being more inhibitory than acidic ones in both systems. The Pd-biofilm reactor effectively reduced Cr(VI) concentrations from 1–10 mg/L to below the maximum contaminant level of 0.1 mg/L, thus appearing as an efficient technique to treat Cr-contaminated waters.

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Dynamic Landscape of Multi-Elements in Pm2.5 Revealed by Real-Time Analysis

SSRN

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SSRN 2022年

作者： Ji, Xiaomeng Qin, Ruiliang Shi, Chunzhen Yang, Lin Yao, Linlin Deng, Shenxi Qu, Guangbo Yin, Yongguang Hu, Ligang Shi, Jianbo Jiang, Guibin State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China School of Environmental Science and Engineering Shandong University Qingdao266237 China School of Water Resources and Environment China University of Geosciences Beijing100083 China College of Ecology and Environment Beijing Technology and Business University Beijing100048 China School of Environment Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou310000 China State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution School of Environmental Studies China University of Geosciences Wuhan430074 China

Metal components in fine particulate matter (PM 2.5 ) are closely associated with many adverse health outcomes. Dynamic changes of metals in PM 2.5 are critical for risk assessment due to their temporal variations. Herein, an online method for real-time determination of multi-elements (As, Cd, Cs, Cu, Fe, Mg, Mn, Pb, Rb, Sn, Tl, and V) in PM 2.5 was established by directly introducing air samples into inductively coupled plasma mass spectrometry (ICPMS). Meanwhile, a quantified method using metal standard aerosols (Cr, Mo, and W) and high time-resolution for 3.3 min online measurement was developed and validated. The limits of detection were in range of 0.001–6.30 ng/m 3 for different metals. Subsequently, the real-time contents of multi-elements in PM 2.5 for 12 h over 33 days were measured at different air qualities. Temporal variations of crustal elements like Fe, Mg are similar as PM 2.5 , whereas toxic elements (Pb, As and Cd) have upward trends at dusk. This denoted the association with various emission sources and different exposure concentrations of metals. In addition to the acquisition of real-time information, online analysis of multi-elements in PM 2.5 is beneficial for atmospheric monitoring and provides critical insights for the different exposure risks of metals in PM 2.5 at varying times. © 2022, The Authors. All rights reserved.

关键词： Metals

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Rational regulation of surface Fe(II) species on sewage sludge-derived biochar for sustainable and efficient peracetic acid (PAA) activation and water decontamination

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Separation and Purification Technology 2025年 375卷

作者： Liu, Shanshan Keng, Zizhe Muhammad, Danish Chen, Yiqian Kakalatsa, Sonwabo Sylvester Zhang, Yunhui Zheng, Qiteng Wang, Fei Wu, Yanqing Guo, Lingling Xu, Jian Ye, Jianfeng College of Environmental Science and Engineering Tongji University Shanghai200092 China G.T. Road Lahore Pakistan Key Laboratory of Urban Water Supply Water Saving and Water Environment Governance in the Yangtze River Delta of Ministry of Water Resources Shanghai200092 China State Key Laboratory of Pollution Control and Resource Reuse Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China College of Civil Engineering Tongji University Shanghai200092 China Institute of Geotechnical Engineering School of Transportation Southeast University Nanjing210096 China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai201204 China State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control Nanjing Institute of Environmental Sciences Ministry of Ecology and Environment of China Jiangsu Province Nanjing210042 China

The treatment of sewage sludge is an increasing environmental and social concern due to its daily generation in large quantities. In this study, sewage sludge was pyrolyzed at adjusted temperatures to produce biochar (SBC300, SBC500, SBC700 and SBC900) for the rational regulation of surface Fe species as a catalyst for peracetic acid (PAA)-based water decontamination. The highest bisphenol A removal (99.9 % in 10 min, kobs = 0.602 min−1) was achieved by SBC900, and both adsorption and degradation were enhanced due to increased surface area and electron-rich functional groups (especially C[dbnd]O), and the [tbnd]Fe(III) to [tbnd]Fe(II) transformation and defects (ID/IG = 0.96), respectively. The [tbnd]Fe(II)/[tbnd]Fe(III) redox dominated PAA activation, and lattice oxygen and PAA induced inherent/generated [tbnd]Fe(III) to [tbnd]Fe(II). Alkoxy radicals (R-O[rad], mainly CH3C(O)O[rad] and CH3C(O)OO[rad]), [rad]OH and O2[rad]− were produced but only R-O[rad] and [rad]OH were reactive species, suggesting a complete radical pathway. This study offers an economic and handy scheme for the efficient reuse of waste-derived catalysts and provides atomic-level activation mechanisms. © 2025 Elsevier B.V.

关键词： Radiation decontamination

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Effect of Solid Bases Catalyst on Conversion of Acrylonitrile into Acrylic Acid by Hydrothermal Reaction 5

Effect of Solid Bases Catalyst on Conversion of Acrylonitril...

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2020 5th International Conference on Advances in Energy and Environment Research, ICAEER 2020

作者： Yue, Chang Ye, Haixia Yang, Xuejun Wang, Ke Miao, Jia Liu, Shiyang Shen, Zheng Zhang, Yalei State Key Laboratory of Pollution Control and Resources Reuse National Engineering Research Center of Protected Agriculture Shanghai Engineering Research Center of Protected Agriculture Tongji University Shanghai200092 China College of Civil Engineering and Architecture Zhejiang University of Technology Hangzhou310014 China Shanghai Huajie Ecological Environment Engineering Co. Ltd. Shanghai201407 China

This study aims at the shortcomings of the current industrial application of acrylonitrile wastewater treatment, using alkali-catalyzed hydrothermal technology to convert acrylonitrile into acrylic acid for achieving resource utilization. In this study, alkali metal, alkaline earth metal hydroxide and composite solid base were used as catalysts to investigate catalytic effects of these solid based on the hydrothermal reaction. The results show when using the alkali and alkaline-earth metal hydroxides as catalysts, the best effect of treatment was KOH and the highest yield of acrylic acid reached 56.60%. It was also found that, among the three kinds of solid base catalysts (Ca-O-Mg, K-O-Al, K-O-Si) adopted with the same mass and various loading capacity, K-O-Si (15%) was the most effective catalyst for the conversion of acrylonitrile, and the highest yield of acrylic acid reached 57.78%. This process provides an environmentally friendly method toward the synthesis of useful acrylic acid from acrylonitrile within a very short time. © The Authors, published by EDP Sciences, 2020.

关键词： Catalysts

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Corrigendum to "Nationwide meta-analysis of microplastic distribution and risk assessment in China's aquatic ecosystems, soils, and sediments" [J Hazard Mater 447 (2024) 135331]

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Journal of hazardous materials 2025年 481卷 137031页

作者： Qiannan Duan Baoxin Zhai Chen Zhao Kangping Liu Xiangyi Yang Hailong Zhang Pengwei Yan Lei Huang Jianchao Lee Weidong Wu Chi Zhou Xudong Quan Wei Kang Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity College of Urban and Environmental Sciences Northwest University Xi'an 710127 China. State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210023 China. Electronic address: huanglei@***. Department of Environment Science Shaanxi Normal University Xi'an 710119 China. Electronic address: jianchaolee@***. Shaanxi Key Laboratory of Environmental Monitoring and Forewarning of Trace Pollutants Xi'an 710005 China.

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Risk of illness-related school absenteeism for elementary students with exposure to PM2.5 and O3

SSRN

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SSRN 2022年

作者： Zhang, Ting Wu, Yangyang Guo, Yuming Yan, Beizhan Wei, Jing Zhang, Hongliang Meng, Xia Zhang, Can Sun, Hong Huang, Lei State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University 163 Xianlin Avenue Qixia Nanjing210023 China Department of Epidemiology and Preventive Medicine Australia Lamont-Doherty Earth Observatory Columbia University 61 Rt. 9W. Palisades New York10964 United States Department of Atmospheric and Oceanic Science Earth System Science Interdisciplinary Center University of Maryland 20740 United States Department of Environmental Science and Engineering Fudan University Shanghai200438 China School of Public Health Key Laboratory of Public Health Safety The Ministry of Education Shanghai200032 China Key Laboratory of Health Technology Assessment The Ministry of Health Fudan University Shanghai200032 China Jiangsu Provincial Center for Disease Control and Prevention Jiangsu Road 172 Nanjing210009 China

Air pollution addresses short-term health effects on morbidity, especially for children. Assessing the impacts of air pollution on elementary students is critical for developing preparedness response strategies for this sensitive group. In the 2016-17 academic year, up to 687,748 groups of illness-related absence records and the information of whether the absentee had gone to a hospital or not were collected from 2,564 elementary schools across Jiangsu Province, China. We explored the associations between air pollution and illness-related records using a time-stratified case-crossover analysis with distributed lag non-linear design. An increase of 10 µg/m3 in the current-day concentration of PM2.5 and O3 was positively associated with illness-related absenteeism overall. The excess risk of absenteeism was 4.52% (95%CI 4.37-4.67%) for PM2.5 and 0.25% (95%CI 0.01-0.36%) for O3. The risk associated with O3 boosted for the frequent absentees who tended to have basic diseases or were more vulnerable to infectious diseases. Students in 43.1% illness-related absenteeism, mainly due to highly infectious diseases, only received home nursing without going to a hospital. The increase in the number of illness cases associated with PM2.5 and O3 estimated based on the illness-related absence data was 41.5% and 18.6% higher than that evaluated based on hospital visit records. Such underestimations were robust in sensitivity analyses and persisted in subgroups classified by gender or grade. Together, the performance of illness-related absence records far outweighed that of hospital visit data regarding the thorough evaluation of health effects in elementary students. Improvement in air quality and home health care education are warranted as well for the health benefits of children. © 2022, The Authors. All rights reserved.

关键词： Diseases

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The colorful chemistry of nanoscale zero-valent iron(nZVI)

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Journal of Environmental Sciences 2018年第5期30卷 1-3页

作者： Yilong Hua Jing Liu Tianhang Gu Wei Wang Wei-xian Zhang State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and Engineering Tongji University School of Chemical Science and Engineering Tongji University

Nanoscale zero-valent iron （nZVI） possesses unique chemistry and capability for the separation and transformation of a growing number of environmental contaminants. A nZVI particle consists of two nanoscale components, an iron （oxyhydr）oxides shell and a metallic iron core. This classical ＂core-shell＂ structure offers nZVI with unique and multifaceted reactivity of sorption, complexation, reduction and precipita- tion due to its strong small particle size for engineering deployment, large surface area, abundant reactive sites and electron-donating capacity for enhanced chemical activity. For over two decades, research has been steadily expanding our understanding on the reaction mechanisms and engineering performance of nZVI for soil and groundwater remediation, and more recently for wastewater treatment.

关键词： Nanoscale zero-valent iron （nZVI） Environmental nanotechnology Dyes and pigments Wastewater treatment Spherical aberration-corrected scan-ning transmission electron micros-copy （Cs-STEM）

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