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Freestanding Catalytic Membranes Assembled from Blade-Shaped Prussian Blue Analog Sheets for Flow-Through Degradation of Antibiotic Pollutants

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SSRN 2023年

作者： Li, Jiaxin Yi, Huiyu Liang, Chenge Shen, Yi Li, Yungui Fang, Qile Research and Development Center for Watershed Environmental Eco-Engineering Beijing Normal University Zhuhai519087 China State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing100875 China Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of Environment Zhejiang University of Technology Hangzhou310032 China Sichuan Provincial Sci-Tech Cooperation Base of Low-cost Wastewater Treatment Technology Department of Environmental Engineering Southwest University of Science and Technology Mianyang621010 China

Membrane catalysis is a frontier technology for effectively removing organic containments, and burgeoning membranes assembled from two-dimensional (2D) materials have significantly flourished in peroxymonosulfate (PMS)-based catalytic membrane processes. Here, a bottom-up strategy based on restricting CoFe Prussian blue analog (PBA) crystal growth in one direction is used to fabricate large-scale 2D blade-shaped PBA sheets, whose radial size and thickness can be adjusted by the precursor ion ratio (CoII/FeII). The stripe CoFe PBA sheets can directly serve as building blocks and are simply assembled into a free-standing 2D membrane by interweaving assembly. The assembled CoFe PBA catalytic membrane possesses excellent wetting properties, guaranteeing an unimpeded mass transfer process, which leads to a superior instantaneous catalytic performance for the antibiotic norfloxacin during the continuous and flow-through membrane catalytic process. SO4•− and 1O2 are demonstrated to be the main active species, which synergistically contribute to the PMS-driven organic degradation. © 2023, The Authors. All rights reserved.

关键词： Antibiotics

Freestanding Catalytic Membranes Assembled from Blade-Shaped Prussian Blue Analog Sheets for Flow-Through Degradation of Antibiotic Pollutants

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SSRN 2023年

关键词： Antibiotics

Locating acoustic emission sources in pseudo-triaxial experiments with the shortest path and orthogonal constraint

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Journal of Rock Mechanics and Geotechnical engineering 2024年

作者： Rui, Yichao Pu, Yuanyuan Chen, Jie Zhu, Cunjin Zhang, Sheng Chen, Jiongkun Zhou, Zelin Wang, Wenzhong State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University Chongqing 400044 China School of Resources and Safety Engineering Chongqing University Chongqing 400044 China Department of Civil and Environmental Engineering Universitat Politècnica de Catalunya (UPC) 08034 Spain China 19th Metallurgical Corporation Chengdu 610031 China Coal Geological Exploration Institute of Gansu Lanzhou 730000 China

Acoustic waves in the pseudo-triaxial experiment system experience refraction phenomena. The conventional assumption that acoustic waves propagate along a straight line in traditional methods can lead to significant errors in localization results. To the end, this paper presents a method for locating acoustic emission (AE) sources in pseudo-triaxial experiments using shortest paths and orthogonal constraints. The approach consists of three main steps: (1) establishing control equations for refraction paths from AE sources to sensor locations;(2) calculating refraction point locations using the shortest travel principle and orthogonal constraints;(3) determining source coordinates using Taylor's first-order expansion. The results from laboratory AE experiments demonstrate that the average localization accuracy of the new method is only 6.5 mm, which is 66% more precise than the accuracy (19.4 mm) of the traditional method. Furthermore, simulation results indicate that the new method is not affected by the refraction ratio of the media and maintains the highest positioning accuracy across various arrival and velocity errors. © 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences

关键词： Acoustic emission (AE) Orthogonal constraint Pseudo-triaxial experiment Shortest path Source localization

Distribution and Biomagnification of Hexabromocyclododecanes (Hbcds) in Edible Marine Fish in the Beibu Gulf, China: Implication for Seafood Dietary Risk

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SSRN 2024年

作者： Yang, Xi Huang, Liangliang Zhang, Li Zhu, Liang Cheng, Yanan Wang, Caiguang Zhao, Shuwen Yang, Yiheng Kang, Bin College of Environmental Science and Engineering Guilin University of Technology Guilin541004 China Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area Guilin University of Technology Guangxi Guilin541004 China Guangxi Key Laboratory of Beibu Gulf Marine Resources Environment and Sustainable Development Fourth Institute of Oceanography Ministry of Natural Resources Guangxi Beihai536009 China College of Fisheries Ocean University of China Shandong Qingdao266100 China

Hexabromocyclododecanes (HBCDs) are emerging additive brominated flame retardant. In present study, the distribution, biomagnification and potential human health risk associated with HBCDs were investigated in six edible marine fish species from three bays in the Beibu Gulf, China. The concentration of HBCDs ranged from 0.05 to 200 ng/g lipid weight (lw), with Scoliodon laticaudus and Trichiurus nanhaiensis having the highest and lowest concentration, respectively. The α-HBCD was dominant in most studied fish, expect for Scoliodon laticaudus. Dietary source was the primary factor for the diastereomeric profiles of HBCDs in fish. Only γ-HBCD demonstrated trophic magnification in the studied fish species. Finally, the estimated daily intake (EDI) was 0.18 ng/kg/day for adults, 0.17 ng/kg/day for teenager and children, and all corresponding margin of exposure (MOE) values were lager than 8 indicating relatively low human exposure risks from fish consumption. © 2024, The Authors. All rights reserved.

关键词： Fish

The Decontamination Behavior of Cadmium and Arsenic in Aqueous and Soil Using Alkali/Fe-Modified Cotton Straw-Based Biochar

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SSRN 2023年

作者： Zeng, Linwei Luo, Dinggui Liu, Lirong Huang, Xuexia Liu, Yu Wei, Lezhang Xiao, Tangfu Wu, Qihang School of Environmental Science and Engineering Guangzhou University Guangzhou510006 China Linköping University Guangzhou University Research Center on Urban Sustainable Development Guangzhou University Guangzhou510006 China Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of Education Guangzhou University Guangzhou510006 China Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources Guangzhou University Guangzhou510006 China School of Environmental Science and Engineering Sun Yat-sen University Guangzhou510275 China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu610059 China

Fabricating low-cost and efficient adsorbents to purify aqueous and soil with Cd(II) and As(V) contaminants remains challenging. Previous studies have demonstrated that alkali-modified and iron-modified biochar promote the adsorption of cationic and anionic pollutants. Herein, alkali/Fe-modified cotton straw-based biochar (FACSB) was fabricated, and its performance and the mechanism for remediation of Cd and As in aqueous and soil were investigated. The initial pH, kinetics, isotherms, and coexisting ions on single and binary-adsorption aqueous systems, as well as the temporal effects of passivation in co-contaminated soils, were systematically examined. The results showed that the maximum adsorption capacity of Cd(II) and As(V) were 42.57 and 30.69 mg/g for single-adsorption system, 41.27 and 34.51 mg/g for binary-adsorption adsorption system, respectively, enhancing adsorption for As(V). The presence of Mg2+ and Ca2+ competed with Cd(II), whereas PO43- inhibited As(V) adsorption, and the high ionic strength exerted a detrimental impact on Cd(II) adsorption. The mechanisms for removing Cd(II) and As(V) could be mainly electrostatic attraction, precipitation, and multi-complexation. Continuous soil incubation for half-year revealed a substantial reduction in the bioavailability of Cd and As, decreasing by 79.99% and 34.72%, respectively, at 5% treatment (amendment/soil ratio). Amendment, rising soil pH and SOM facilitated to immobilize contaminants. © 2023, The Authors. All rights reserved.

关键词： Adsorption

Deicing salt exacerbates freshwater salinization under climate change and human activities

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Innovation 2025年第6期6卷 100862页

作者： Zhao, Ziyong Yang, Wenyu Hua, Pei Krebs, Peter Zhang, Jin Institute for Ecological Research and Pollution Control of Plateau Lakes Yunnan University Kunming650500 China School of Geography South China Normal University Guangzhou510631 China Institute of Urban and Industrial Water Management Technische Universität Dresden Dresden01062 Germany Chair of Engineering Hydrology and Water Management Technische Universität Darmstadt Darmstadt64287 Germany Department of Hydrogeology Helmholtz Centre for Environmental Research – UFZ Leipzig04318 Germany Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety School of Environment South China Normal University Guangzhou510006 China The National Key Laboratory of Water Disaster Prevention Yangtze Institute for Conservation and Development Hohai University Nanjing210098 China

La Doping of Cofe Prussian Blue Analogs for Improved Catalytic Activity Toward Norfloxacin Degradation

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SSRN 2024年

作者： Yi, Huiyu Liang, Chenge Li, Yungui Zhang, Suorong Fang, Qile Sichuan Provincial Sci-Tech Cooperation Base of Low-cost Wastewater Treatment Technology Department of Environmental Engineering Southwest University of Science and Technology Mianyang621010 China Research and Development Center for Watershed Environmental Eco-Engineering Beijing Normal University Zhuhai Campus Zhuhai519087 China NHC Key Laboratory of Nuclear Technology Medical Transformation Mianyang Central Hospital School of Medicine University of Electronic Science and Technology of China Sichuan Mianyang621000 China Chongqing Feiyang Measurement and Control Technology Research Institute Co. Ltd Chongqing402760 China China West Normal University China

Prussian blue analogs (PBAs) are promising catalysts in heterogeneous oxidation processes. The catalytic activity of PBAs relies on exposed crystal facets and accessible active sites on the PBA framework. Employing a heteroatom doping strategy using a rare earth element (La), we regulated the crystal structure and optimized the catalytic activity of CoFe PBA for peroxymonosulfate (PMS)-driven degradation of the antibiotic norfloxacin (NOR). The La atoms were mainly doped in the interstitial sites of the CoFe PBA cubic lattices, without affecting the electron distributions of Co and Fe metals or the face-centered cubic crystal phase of the coordination skeleton. La doping dominated the (111) and (100) as the main exposed facets of CoFeLa PBA, increasing the affinity of CoFeLa PBAs for PMS adsorption due to the higher surface energy of the two facets. Consequently, the activation energy considerably declined from 77.57 kJ/mol in CoFe PBA to 51.66 kJ/mol in CoFeLa PBA and the catalytic activity for PMS-driven NOR degradation was largely improved. 1O2 was proven as the main reactive specie responsible for NOR degradation in the PMS/CoFeLa system, and O2·− and SO4·− were verified as the important intermediates to generate 1O2. Thus, La doping can effectively enhance the catalytic performance of PBA-based catalysts for organic pollutant removal. © 2024, The Authors. All rights reserved.

关键词： Activation energy

Oxygen Vacancy-Induced Spin Polarization of Tungsten Oxide Nanowires for Efficient Photocatalytic Reduction and Immobilization of Uranium(Vi) Under Simulated Solar Light

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SSRN 2022年

作者： Yang, Xudong Li, Fan Liu, Wen Chen, Long Qi, Juanjuan Sun, Weiliang Duan, Tao Sun, Fengbin College of Environmental Sciences and Engineering The Key Laboratory of Water and Sediment Sciences Ministry of Education Peking University Beijing100871 China The Key Laboratory of Resources and Environmental System Optimization Ministry of Education College of Environmental Science and Engineering North China Electric Power University Beijing102206 China International Joint Laboratory for Regional Pollution Control Ministry of Education Peking University Beijing100871 China Department of Civil and Environmental Engineering Louisiana State University Baton RougeLA70803 United States State Key Laboratory of Environment-friendly Energy Materials Southwest University of Science and Technology Sichuan Mianyang621010 China Institute of Urban Meteorology China Meteorological Administration Beijing100089 China

Tungsten oxide nanowires (WO3-x) with rich oxygen vacancies (OVs) were fabricated through a facile hydrothermal method, which had both high adsorptive capability and photocatalytic activity. 95.1% of total U(VI) (C0 = 10 mg/L) was removed by WO3-x at pH 5, and 79.9% was transformed to U(IV) to achieve reductive immobilization after photocatalysis under simulated solar light. Band structure and optical characterizations indicated WO3-x had narrower band gap energy, but higher charger carrier separation and transfer rates compared with conventional WO3. Density functional theory (DFT) calculations further demonstrate the spin polarization state electrons of W 5d in WO3-x due to the construction of OVs, thus greatly inhibiting recombination of electron-hole pairs. In addition, the electron density increases in WO3-x and the photogenerated e– in the conduction band of WO3-x has higher reduction ability than WO3, leading to more efficient electron transfer from WO3-x to UO22+ after photo-excitation for U(VI) reduction. © 2022, The Authors. All rights reserved.

关键词： Tungsten compounds

Efficient photocatalytic degradation of statin via optimization on ZnIn_(2)S_(4)/Bi_(2)WO_(6) Z-scheme heterostructure

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Journal of Advanced Dielectrics 2024年第4期14卷 104-114页

作者： Tingting Liu Libing Cao Mengge Yan Yushan Hu Tianlong Ren Zheng Wu School of Environmental and Chemical Engineering Xi’an Key Laboratory of Textile Chemical Engineering Auxiliaries Engineering Research Center of Biological Resources Development and Pollution Control Universities of Shaanxi Province Key Laboratory of Textile Dyeing Wastewater Treatment Universities of Shaanxi Province Xi’an Polytechnic University No.19Jin Hua RoadXi’an710048P.R.China Key Laboratory of Northwest Water Resource Environment and Ecology MOE Xi’an University of Architecture and Technology No.13Yan Ta RoadXi’an710055P.R.China Northwest Branch of Beijing CCI Architectural Design Co. Ltd No.26Gao Xin RoadXi’an 710065P.R.China Xi’an Capital Water Company Limited No.368 Kun Ming RoadXi’an 710086P.R.China

Statins are widely used in the treatment of hyperlipidemia disease,which are refractory in the municipal sewage treatment *** photocatalytic degradation of statins by the Z-scheme heterostructured photocatalyst is confirmed,but the degradation mechanism of statins needs to be further *** this study,the effects of photocatalyst dosage,solution pH and humic acid(HA)on the photocatalysis of fluvastatin by ZnIn_(2)S_(4)/Bi_(2)WO_(6) Z-scheme heterostructured photocatalyst(ZIS/BWO photocatalyst)were investigated and the degradation mechanism was *** showed that adsorption of fluvastatin was improved with the increase of photocatalyst dosage,but photoinduced desorption and light scattering resulted in the decrease of the removal of fluvastatin with high dosage.0.2 g/L of the ZIS/BWO photocatalyst was optimal dosage.65.21%of fluvastatin was removed at pH=9,because high concentration of OH^(-)was conducive to produce·*** change of pH,competition of photons and active sites,and trapping of reactive oxygen species(ROS)by carboxyl group of HA combined to inhibit the photocatalysis of fluvastatin in the presence of *** C–C,C=C and C–N bonds of fluvastatin were attacked by a variety of ROS to generate degradable intermediates that were easily mineralized to H_(2)O and CO_(2).

关键词： Fluvastatin photocatalytic technology Z-scheme heterostructured photocatalyst reaction condition degradation mechanism