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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

Disclosing the intrinsic nature of efficient removal of antibiotics in N/S dual-doped porous carbon-based materials: The manipulation of internal electric field

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Chemosphere 2024年 355卷 141788页

作者： Wang, Tao He, Yujie Zhao, Zhongjing Zhao, Zhonghua Guo, Xiaochun Lu, Shaoyong Zhang, Lu State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing210008 China Environmental and Biological Engineering Nanjing University of Science and Technology Nanjing210094 China National Engineering Laboratory for Lake Pollution Control and Ecological Restoration State Environment Protection Key Laboratory for Lake Pollution Control State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu-SEPSORSLD State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China

N/S co-doping has emerged as a prevailing strategy for carbon-based adsorbents to facilitate the antibiotic removal efficiency. Nevertheless, the underlying interplay among N, S, and their adjacent vacancy defects remains overlooked. Herein, we present a novel in situ strategy for fabricating pyridinic-N dominated and S dual-doped porous carbon adsorbent with rich vacancy defects (VNSC). The experimental results revealed that N (acting as the electron donor) and S (acting as the electron acceptor) form an internal electric field (IEF), with a stronger IEF generated between pyridinic-N and S, while their adjacent vacancy defects activate carbon π electrons, thus enhancing the charge transfer of the IEF. Density functional theory (DFT) calculations further demonstrated that the rich charge transfer in the IEF facilitated the π-π electron donor-acceptor (EDA) interaction between VNSC and tetracycline (TC) as well as norfloxacin (NOR), and thus is the key to adsorption performance of VNSC. Consequently, VNSC exhibited high adsorption capacities toward TC (573.1 mg g−1) and NOR (517.0 mg g−1), and its potential for environmental applications was demonstrated by interference, environmentally relevant concentrations, fixed-bed column, and regeneration tests. This work discloses the natures of adsorption capacity for N/S dual-doped carbon-based materials for antibiotics. © 2024 Elsevier Ltd

关键词： Antibiotics

Optimized Local Geometry and Electronic Structure of Moo3/Ceo2 Catalyst by Adding Copper Cations for Boosted Nitrogen Oxide Reduction Performance

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SSRN 2023年

作者： Liu, Hao Gao, Chuan Chen, Jianjun Mi, Jinxing Yang, Shan Chen, Deli Si, Wenzhe Peng, Yue Sun, Chuanzhi Li, Junhua State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China College of Chemistry Chemical Engineering and Materials Science Shandong Normal University Jinan250014 China

The construction of high-activity centers over the CeO2-based catalyst for the low-temperature NH3 selective catalytic reduction of nitrogen oxides (NH3–SCR) technology in non-power industry is one of the challenges in the application field. Herein, the SCR performance of MoO3/CeO2 catalyst has been remarkably enhanced by introducing Cu to induce the generation of active Mo=O structure. Advanced spectroscopy characterizations reveal that the adding of Cu into MoO3/CeO2 catalyst could create unsaturated sites on CeO2 for Mo anchor, and the enhanced electrons transfer from Mo to Cu would cause the formation of a new terminal Mo=O with highly distorted octahedral geometry, which is a new Lewis acid site for coordinated NH3 production. Meanwhile, the added Cu creates the adsorbed site for gaseous NO and the formed Mo-O-Cu pair center facilitates the transformation of ionic NO2– generated from NO adsorption to NO2, which is conducive to the fast SCR reaction process. © 2023, The Authors. All rights reserved.

关键词： Cerium oxide

Determining Methane Emission Rates from Compressed Natural Gas Stations Using Mobile Measurements and Multi-Scheme Plume Dispersion Modelling

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SSRN 2023年

作者： Huang, Yufei Zhang, Yuheng Xie, Conghui Liu, Yayong Yang, Yanrong Li, Shao-Meng Han, Tianran State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing100871 China

This study introduced a multi-scheme coupled Gaussian emission inversion method, and its application to CH4 emission measurements of compressed natural gas (CNG) stations in urban Beijing, China. Using a mobile laboratory, the CH4 plume lateral dispersion parameters downwind of multiple CNG stations were measured, and were shown to increase rapidly within a downwind distance of 200 m, reaching a plateau at a downwind distance of 250 m. Considering the complex topography and source nature of CNG stations, an ensemble of four Gaussian dispersion schemes was used, by comparing scheme-estimated and measured to quantify the bias and uncertainty of each scheme. Of the four, the Taylor scheme showed consistent overestimation of (ratio = 2.35). The Briggs scheme showed good agreement with in downwind distance larger than 200 m, and underestimation of for shorter distances. The Hanna scheme behaved poorly in depicting the decreasing pattern of plume growth rate, and showed greater underestimation of than the Briggs scheme. The OTM33 (Other Test Method 33) scheme showed good agreement with in range of 0-200 m, and had an underestimation of © 2023, The Authors. All rights reserved.

关键词： Uncertainty analysis

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

Accumulation Kinetics of Polystyrene Nano- and Microplastics in the Waterflea Daphnia Magnaand Trophic Transfer to the Mysid Limnomysis Benedeni

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SSRN 2024年

作者： Yu, Qi Nederstigt, Tom A.P. Wang, Zhuang Wu, Juan Bosker, Thijs Peijnenburg, Willie J.G.M. Vijver, Martina G. State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control South China Institute of Environmental Science Ministry of Ecology and Environment Guangzhou510535 China Leiden University Leiden2300 RA Netherlands School of Environmental Science and Engineering Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing University of Information Science and Technology Nanjing210044 China Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province Zhejiang University of Technology Hangzhou310014 China Bilthoven3720 BA Netherlands

Trophic transfer of nano- and microplastics (NMPs) within food webs is poorly understood. Here we investigated the accumulation of differently sized polystyrene particles (PSPs) in Daphnia magna and their subsequent transfer to Limnomysis benedeni, explicitly accounting for the fate of the PSPs in the aquatic system as a function of particle size (26, 500 and 4800 nm). L. benedeni were fed D. magna exposed to 8 mg/L PSPs for 16 h and were subsequently depurated for 48 h in the absence of food. On the basis of the mass of particles accumulated in the organisms, the internal concentration of 4800 nm PSPs was found to be 4 -10 times higher than that of 26 and 500 nm PSPs in D. magna. Uptake rate constants in daphnids for 26 nm (1.7 ± 0.4 L/g·h) and 4800 nm (1.7 ± 0.4 L/g·h) were significantly (p © 2024, The Authors. All rights reserved.

关键词： Rate constants

Characteristics of runoff and sediment yield for two typical erodible soils in southern China

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International Journal of Sediment Research 2022年第5期37卷 653-661页

作者： Xuchao Zhu Yin Liang Lili Qu Longxi Cao Zhiyuan Tian Tong Liu Meng Li State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences College of Advanced Agricultural Sciences University of Chinese Academy of Sciences College of Ecology and Environment Chengdu University of Technology National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangdong Key Laboratory of IntegratedAgro-environmental Pollution Control and Management Institute of Eco-environmental and Soil Sciences Guangdong Academy of Sciences Hydrology and Water Resources Investigation Bureau of Jiangsu Province

Granite red soil(GRS) and Quaternary red clay(QRC) are two typical erodible soils in the red-soil region of southern China. Analytical and comparative studies of the characteristics of runoff and sediment yield for the two soils at various slopes are currently needed. The purpose of the current study was to clarify the characteristics of runoff and sediment yield for GRS and QRC at different slopes and to establish models for estimating sediment yield for the two soils. Forty-eight runoff microplots with four slopes(5°, 15°, 25°, and 35°) and two soils(GRS and QRC) were established and exposed to natural rainfall. Runoff and sediment yield were measured 10 times during the study period. Runoff and sediment yield for the two soils under the various slopes had similar temporal variations, and both increased with prior cumulative erosive rainfall. Runoff for GRS and QRC was moderately temporally variable, with coefficients of variation(CVs) from 46.2% to 60.6%, and sediment yield for QRC was strongly temporally variable, with CVs from 114.8% to 145.8%. Sediment yield for GRS increased with slope, but sediment yield for QRC first increased and then decreased, with a calculated inflection point of 18°, but runoff for both soils decreased with slope. The CVs of both runoff and sediment yield with slope for the two soils ranged from 3.6% to 88.0%, lower than the temporal variabilities, indicating that rainfall may have a larger impact than slope on runoff and sediment yield for QRC and GRS. Under the various slopes, runoff and sediment yield for both soils increased with rainfall and sediment yield increased with runoff, but the proportions of effective rainfall and runoff differed. Pedotransfer-function models based on rainfall, runoff, and slope accurately estimated sediment yield for the two soils, with the model fit coefficient of determination(R2) > 0.81 and the R2for verification >0.79. These results improve the understanding of the laws governing erosion for differe

关键词： Runoff and sediment characteristics Sediment-yield simulation Granite red soil Quaternary red clay Pedotransfer function Red-soil region

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

Alcohol consumption promotes arsenic absorption but reduces tissue arsenic accumulation in mice

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Eco-environment & Health 2023年第3期2卷 107-116页

作者： Hongyu Wang Albert L.Juhasz Yaosheng Zhang Lizhu Zhang Lena Q.Ma Dongmei Zhou Hongbo Li State Key Laboratory of Pollution Control and Resource Reuse Jiangsu Key Laboratory of Vehicle Emissions ControlSchool of the EnvironmentNanjing UniversityNanjing 210023China Future Industries Institute University of South AustraliaMawson LakesSouth Australia 5095Australia Department of Nanxin Pharm Nanjing 210000China Institute of Soil and Water Resources and Environmental Science College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China

Alcohol consumption alters gut microflora and damages intestinal tight junction barriers,which may affect arsenic(As)oral *** this study,mice were exposed to arsenate in the diet(6μg/g)over a 3-week period and gavaged daily with Chinese liquor(0.05 or 0.10 mL per mouse per day).Following ingestion,78.0%and 72.9%of the total As intake was absorbed and excreted via urine when co-exposed with liquor at daily doses of 0.05 or 0.10 mL,significantly greater than when As was supplied alone(44.7%).Alcohol co-exposure significantly altered gut microbiota but did not significantly alter As biotransformation in the intestinal tract or *** lower relative mRNA expression was observed for genes encoding for tight junctions in the ileum of liquor co-exposed mice,contributing to greater As bioavailability attributable to enhanced As absorption via the intestinal paracellular ***,As concentration in the liver,kidney,and intestinal tissue of liquortreated mice was decreased by 24.4%-42.6%,27.5%-38.1%,and 28.1%-48.9%compared to control *** was likely due to greater renal glomerular filtration rate induced by alcohol,as suggested by significantly lower expression of genes encoding for renal tight *** addition,in mice gavaged daily with 0.05 mL liquor,the serum antidiuretic hormone level was significantly lower than control mice(2.83±0.59 vs.5.40±1.10 pg/mL),suggesting the diuretic function of alcohol consumption,which may facilitate As elimination via *** results highlight that alcohol consumption has a significant impact on the bioavailability and accumulation of As.

关键词： Arsenic speciation Alcohol consumption Oral bioavailability Tissue accumulation Tight junctions

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 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