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Environmental science & technology 2025年第22期59卷 2025 May 28页

作者： Ling Yuan Han Zhang Hang Yu Rongming Xu Weiming Zhang Yanyang Zhang Ming Hua Lu Lv Bingcai Pan State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210023 China. Research Center for Environmental Nanotechnology (ReCENT) Nanjing University Nanjing 210023 China.

The development of new adsorbents for water treatment often involves complex adsorption mechanisms, whose individual contributions are unclear, thereby limiting the understanding of adsorption driving forces, making it difficult to achieve precise design of adsorbents. Machine learning (ML) has been used to uncover the impacts of these mechanisms through feature engineering, but progress is limited by the data quality for training. Herein, we developed a universal ML strategy for precisely predicting the adsorption capacity of polymers for oxyanions and identifying the adsorption driving force based on the combination of experimental and published literature data. The adsorption mechanism was explored through classification of RDkit descriptors with different SHAP importance values, and electrostatic interaction was found to be the driving force in the oxyanion adsorption process, which was further verified by theoretical calculations, adsorption experiments, and effective targeted adsorbent design. In comparison, analysis relying on a separate literature data source led to decreased model performance, some biased conclusions, and invalid targeted adsorbent design. Overall, this study proposed a strategy for data set optimization as well as dominant mechanism identification, which could shed light on better treatment of oxyanions in wastewater.

关键词： Adsorption Data set quality Machine learning Oxyanions Polymers

Electro-enhanced metal-free peroxymonosulfate activator coupled with membrane-assisted process for simultaneous Ni-EDTA decomplexation and Ni ions recovery

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Chemosphere 2023年第1期338卷 139447页

作者： Zhang, Jiaming Yu, Chao Xu, Longqian Zhao, Zhenyu Wu, Deli State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science & Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Electro-enhanced metal-free boron/peroxymonosulfate (B/PMS) system has demonstrated potential for efficient metal-organic complexes degradation in an eco-friendly way. However, the efficiency and durability of the boron activator are limited by associated passivation effect. Additionally, the lack of suitable methods utilizing in-situ recovery of metal ions liberated from decomplexation causes huge resource waste. In this study, B/PMS coupled with a customized flow electrolysis membrane (FEM) system is proposed to address above challenges with Ni-EDTA used as the model contaminant. Electrolysis is confirmed to remarkably promote the activation performance of boron towards PMS to efficiently generate •OH which dominated Ni-EDTA decomplexation in the anode chamber. It is revealed that the acidification near the anode electrode improves the stability of boron by inhibiting passivation layer growth. Under optimal parameters (10 mM PMS, 0.5 g/L boron, initial pH = 2.3, current density = 68.87 A/m2), 91.8% of Ni-EDTA could be degraded in 40 min, with a kobs of 6.25 × 10−2 min−1. As the decomplexation proceeds, nickel ions are recovered in the cathode chamber with little interference from the concentration of co-existing cations. These findings provide a promising and sustainable strategy for simultaneous metal-organic complexes removal and metal resources recovery. © 2023

关键词： Metal recovery

Peroxidase-like activity of widely-used commercial inorganic pigments induces oxidative stress and antibiotic degradation: Implications for health risks

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Science of the Total Environment 2025年 958卷 177979页

作者： He, Kexin Sun, Chenxi Yang, Shuxue Liu, Huiting Fu, Heyun Qu, Xiaolei State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu 210023 China School of Environmental and Chemical Engineering Shenyang Ligong University Liaoning 110159 China

Inorganic pigments, which often contain significant amounts of nanoparticles, are crucial chemicals for human life. They are produced in massive quantities and widely used in consumer products, food, and pharmaceuticals. Herein, we reported that a variety of commonly used commercial inorganic pigments possess peroxidase-like activity, catalyzing hydrogen peroxide (H2O2) decomposition into reactive oxygen species, primarily hydroxyl radical ([rad]OH) and superoxide radical anion (O2[rad]−). The catalytic activity of inorganic pigments exhibits saturation kinetics as described by the Michaelis-Menten model, with optimal pH and temperature conditions that can be found in the human body. The enzyme-mimicking activity is strongly correlated with the formation of [rad]OH (R2 = 0.98), indicating the radical-mediated reaction pathway. The peroxidase-like activity of inorganic pigments can induce significant oxidative stress at health-relevant H2O2 concentrations (3–30 μM), as demonstrated by the ascorbic acid assay. Additionally, the peroxidase-like activity of inorganic pigments is able to mediate the oxidation of tetracycline, with oxidation rate constants positively correlated with the pigments' peroxidase-like activity. The discovery of peroxidase-like activity of commercial inorganic pigments sheds light on the reported oxidative stress exerted by these pigments and has important implications for the health risk assessment of inorganic food and pharmaceutical colorants, as well as colored consumer products. © 2024 Elsevier B.V.

关键词： Aspartame

Enhanced hydrodechlorination of 4-chlorophenol through carboxymethylcellulose-modified Pd/Fe nanosuspension synthesized by one-step methods

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Chemosphere 2024年 356卷 141857页

作者： Qiao, Juan Zhao, Zhenyu Zhou, Zhengwei Wu, Deli State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science & Engineering Key Laboratory of Urban Water Supply Water Saving and Water Environment Governance in the Yangtze River Delta of Ministry of Water Resources Shanghai Institute of Pollution Control and Ecological Security Tongji University Shanghai200092 China

Palladized iron (Pd/Fe) represents one of the most common modification strategies for nanoscale zero-valent iron (nZVI). Most studies prepared Pd/Fe by reducing iron salts and depositing Pd species on the surface of pre-synthesized nZVI, which can be called the two-step method. In this study, we proposed a one-step method to obtain Pd/Fe by the concurrent formation of Fe0 and Pd0 and investigated the effects of these two methods on 4-chlorophenol (4-CP) removal, with carboxymethylcellulose (CMC) coated as a surface modifier. Results indicated that the one-step method, not only streamlined the synthesis process, but also Pd/Fe-CMCone-step, synthesized by it, exhibited a higher 4-CP removal rate (97.9%) compared to the two-step method material Pd/Fe-CMCtwo-step (82.4%). Electrochemical analyses revealed that the enhanced activity of Pd/Fe-CMCone-step was attributed to its higher electron transfer efficiency and more available reactive species, active adsorbed hydrogen species (Hads*). Detection of intermediate products demonstrated that, under the influence of Pd/Fe-CMCone-step, the main route of 4-CP was through hydrodechlorination (HDC) to form phenol and H* was the main active specie, supported by EPR tests, quenching experiments and product analysis. Additionally, the effects of initial 4-CP concentration, initial pH, O2 concentration, anions such as Cl−, SO42−, HCO3−, and humic acid (HA) were also investigated. In conclusion, the results of this study suggest that Pd/Fe-CMCone-step, synthesized through the one-step method, is a convenient and efficient nZVI-modifying material suitable for the HDC of chlorinated organic compounds. © 2024 Elsevier Ltd

关键词： Palladium

Irrigation and nitrogen fertiliser optimisation in protected vegetable fields of northern China:Achieving environmental and agronomic sustainability

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Journal of Integrative Agriculture 2024年第3期23卷 1022-1033页

作者： Bingqian Fan Yitao Zhang Owen Fenton Karen Daly Jungai Li Hongyuan Wang Limei Zhai Xiaosheng Luo Qiuliang Lei Shuxia Wu Hongbin Liu State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/Key Laboratory of Nonpoint Source Pollution Control Ministry of Agriculture and Rural Affairs/lnstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Teagasc Environmental Research CentreWexford Y35Ireland Institute of Plant Nutrition Resources and Environmental SciencesHenan Academy of Agricultural SciencesZhengzhou 450002China

Globally,sub-optimal use of nitrogen (N) fertiliser and elevated N irrigation groundwater have led to high leached nitrate (NO_(3)^(–)) losses from protected vegetable field *** fertiliser and irrigation management in different soil types is crucial to reduce future N loads from such *** present 4-year study examined leached N loads from lysimeter monitoring arrays set up across 18 protected vegetable system sites encompassing the dominant soil types of northern *** treatments applied at each field site were:1) a high N and high irrigation input treatment (HNHI);2) a low N but high irrigation input treatment (LNHI) and 3) a low N with low irrigation input treatment (LNLI).Results showed that the mean annual leached total nitrogen loads from the HNHI,LNHI and LNLI treatments were 325,294 and 257 kg N ha^(–1) in the fluvo-aquic soil,114,100 and 78 kg N ha^(–1) in the cinnamon soil and 79,68 and 57 kg N ha^(–1) in the black soil,*** N dissolved in irrigation water in the fluvo-aquic soil areas was 8.26-fold higher than in the cinnamon areas.A structural equation model showed that N fertiliser inputs and leaching water amounts explained 14.7 and 81.8%of the variation of leached N loads,***,reducing irrigation water by 21.5%decreased leached N loads by 20.9%,while reducing manure N and chemical N inputs by 22 and 25%decreased leached N loads by only 9.5%. This study highlights that protected vegetable fields dominated by fluvo-aquic soil need management to curtail leached N losses in northern China.

关键词： agriculture water quality nitrate groundwater irrigation management

Fe-Mofs Nanosheets for Photo-Fenton Degradation of Carbamazepine

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SSRN 2024年

作者： Sun, Siyu Hu, Youyou Li, Zhengkui State Key Laboratory of Pollution Control and Resource Reuse Nanjing University Nanjing210023 China School of the Environment Nanjing University Nanjing210023 China

Iron-based metal-organic framework (Fe-MOF) nanosheets have potential as functional components for photocatalysis. Prospectively, employing Fe-MOF nanosheets as photocatalysts would notably improve the efficiency of photogenerated carrier separation. However, achieving efficient synthesis of Fe-MOF nanosheets remains a challenging task. Here we present a bottom-up synthesis strategy for producing two-dimensional Fe-MOF nanosheets (TFMN) of micrometer lateral dimensions and nanometer thickness. The application of TFMN in the photo-Fenton degradation of carbamazepine (CBZ) demonstrates remarkable CBZ degradation performance and excellent efficiency across a wide range of pH values. The transfer direction of electrons and state density are further calculated by density functional theory. Mechanism analysis reveals that h+, ·OH, and ·O2- are identified as the predominant active species contributing to the catalytic oxidation process in the Vis/TFMN/H2O2 system. © 2024, The Authors. All rights reserved.

关键词： Nanosheets

Releases of Microplastics and Chemicals from Nonwoven Polyester Fabric-Based Polyurethane Synthetic Leather by Photoaging

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SSRN 2023年

作者： Shi, Yanqi Huang, Hexinyue Zheng, Lezhou Tian, Yechao Gong, Zhimin Wang, Jiahao Li, Wentao Gao, Shixiang State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing210093 China

The nonwoven PET fabrics are chemically, mechanically and thermally treated fiber aggregate without weaving, knitting or braiding, which could be used as a base to make polyurethane (PU) synthetic leather through a series of processing. Our research systematically compared the photoaging behaviors of pure non-woven PET base fabric (NPET-P) and PU synthetic leather (nonwoven PET-base fabrics with PU coating, NPET-U), and their possibilities for microplastic fibers (MPFs) generation and chemical transformation in water. NPET-U was found at a higher oxidation degree with higher O/C ratios and more distinct changes in chemical structures but a slower degradation speed with postponed MPFs release than NPET-P. Different spinning ways of fabrics partly affected the resistance of MPFs release, but the difference between nonwoven and interlocked fabrics was within an order of magnitude. And sunlight aging of fabrics for 365 days approximately equaled 91.9-100.6 hours in the laboratory, which indicated the lab accelerated experiments to simulate natural sunlight aging was extraordinarily intense. Furthermore, elemental concentrations in original fabrics and the leachate of 360 h light aged fabrics were characterized using the inductively coupled plasma optical emission spectrometer (ICP-OES) and analyzed by principal component analysis (PCA). The organic components of the leachate were separated according to their molecular weight with the changes of dissolved organic carbon (DOC), dissolved organic nitrogen (DON), and the UV response over aging time. UV stimulation aggravated the role of plastic polymers as disinfection by-product (DBP) precursors. Nevertheless, NPET-U had similar formation potentials of nitrogen-containing DBPs with NPET-P, even though it could produce more nitrogen-contained chemicals. The discussion lucubrated the potential risks of the production of MPFs and chemical release in the leachate with regard to combined plastic pollution. © 2023, The Authors.

关键词： Weaving

Selection of urban flood shelter locations based on risk assessment

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Water-Energy Nexus 2024年第1期7卷 151-162页

作者： Qiu, Jiale Tan, Haowen Yuan, Shengnan Lv, Chenxi Wang, Peng Cao, Shuchao Zhang, Yuhu Faculty of Civil Engineering and Mechanics Jiangsu University Zhenjiang212013 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China Cranfield Tech Futures Graduate Institute Jiangsu University Zhenjiang212013 China School of Automotive and Traffic Engineering Jiangsu University Zhenjiang212013 China College of Resource Environment & Tourism Capital Normal University Beijing100048 China

Within the framework of global climate change, there is a recurring occurrence of floods and waterlogging disasters, which pose significant risks to human lives and overall safety. The phenomenon of urbanization has led to an increased vulnerability of cities to flood disasters. Evacuation serves as a viable strategy for adapting to climate change, managing intense precipitation events, and mitigating the impact of flood disasters. Hence, the meticulous choice of shelters has emerged as a crucial element in enhancing the effectiveness of evacuations. Nevertheless, the process of choosing shelters sometimes neglects to consider the potential for flooding and has not undergone thorough testing. Hence, the objective of this research is to systematically choose shelters within the central metropolitan region, incorporate flood risk considerations into the shelter site model, and assist cities in mitigating the consequences of floods resulting from climate change. To begin with, employ a two-dimensional shallow water model in order to replicate instances of intense precipitation and produce data on flood inundation. Subsequently, the simulation results are utilized to assess the flood risk using the entropy weight approach. This risk is then incorporated into the multi-objective optimization model to determine the optimal shelter placement. Ultimately, the ABM model was employed to create a simulation of crowd evacuation in urban areas, confirming the efficacy of shelter selection and thoroughly examining the influence of various shelters on the efficiency of community emergency evacuation. The study's findings indicate that a total of 26 shelters were chosen within the study area using a multi-objective methodology, ensuring the inclusion of all affected populations. The utilization of multi-objective models in the selection of shelter places has been shown to enhance evacuation efficiency, as confirmed by the ABM model. The simulation findings indicate a decline in the

关键词： Climate change

Weak Magnetic Carriers Reduce Nitrite Accumulation and Boost Denitrification at High Nitrate Concentrations by Enriching Functional Bacteria and Enhancing Electron Transfer

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SSRN 2023年

作者： Chen, Jiahui Ma, Sijia Wang, Haiyue Wang, Yanru Ren, Hongqiang Xu, Ke State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China

Biological denitrification is the dominant method for NO3- removal from wastewater, while high NO3- leads to NO2- accumulation and inhibits denitrification performance. In this study, different weak magnetic carriers (0, 0.3, 0.6, 0.9 mT) were used to enhance biological denitrification at NO3- NO3-of 50-2400 mg/L. The effect of magnetic carriers on the removal and mechanism of denitrification of high NO3- was investigated. The results showed that 0.6 and 0.9 mT carriers significantly enhanced the TN removal efficiency (> 99%) and reduced the accumulation of NO2- (by > 97%) at NO3- of 1200-2400 mg/L. 0.6 and 0.9 mT carriers stimulated microbial electron transport by improving the abundances of coenzyme Q-cytochrome C reductase and cytochrome C, which contributed to the enhanced elimination of NO3- and NO2-. The activities of NAR and NIR and the abundances of narG and nirS were greatly elevated by 0.6 and 0.9 mT carriers. Denitrifying microorganisms, e.g., Halomonas, Thauera and Pseudomonas were enriched at 0.6 and 0.9 mT carriers, which benefited to the advanced denitrification performance. This study suggests that weak magnetic carriers can help to enhance the biological denitrification of high NO3- wastewater. © 2023, The Authors. All rights reserved.

关键词： Nitrates

Fe-Mofs Nanosheets for Photo-Fenton Degradation of Carbamazepine

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SSRN 2024年

Iron-based metal organic framework (Fe-MOF) nanosheets have potential as functional components for photocatalysis. Prospectively, employing Fe-MOF nanosheets as photocatalyst would notably improve the efficiency of photogenerated carrier separation. However, achieving efficient synthesis of Fe-MOF nanosheets remains a challenging task. Here we present a bottom-up synthesis strategy for producing two-dimensional Fe-MOF nanosheets (TFMN) of micrometer lateral dimensions and nanometer thickness. The application of TFMN in the photo-Fenton degradation of carbamazepine (CBZ) demonstrates remarkable CBZ degradation performance and excellent efficiency across a wide range of pH values. The transfer direction of electrons and state density are further calculated by density functional theory. Mechanism analysis reveals that h+, ·OH, and ·O2- are identified as the predominant active species contributing to the catalytic oxidation process in the Vis/TFMN/H2O2 system. © 2024, The Authors. All rights reserved.

关键词： Nanosheets