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SSRN 2023年

作者： Zhang, Yalan Jia, Xun Xu, Guizhou Liu, Wei Hu, Du Sun, Qianqian Xu, Jinying Zhang, Guihai Xiong, Wenrong Ma, Zhifei Zhang, Yongdong Dai, Jianjun Wu, Daishe Xie, Xianchuan Zhou, Huike Key Laboratory of Poyang Lake Environment and Resource Utilization Ministry of Education School of Resource and Environment Nanchang University Nanchang330031 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Province Nanjing210023 China Hefei Science of Light Technology Co. Ltd Anhui Province Hefei City230000 China Jiangxi Nanxin Environmental Protection Technology Co. Ltd Jiangxi Province Jiujiang City330300 China School of Materials and Chemical Engineering Pingxiang University Jiangxi Province Pingxiang337000 China

In this study, a DMpillar[5]arene adsorption enhanced BWO photocatalysis Fe3O4 selfFenton system was proposed. The system includes the adsorption of pollutants and active substances by DMPBP[5] as the prerequisite and driving force for the reaction, a Bi-based photocatalyst as an in situ robust H2O2 generator, and decorated Fe3O4 (Fe2+/Fe3+) as the trigger and enhancer for H2O2 formation and transformation, which leads to a highly efficient and stable activity for persistent organic pollutants. Considering the photo-oxidation of RhB as a model reaction, this system exhibits 17-18 times higher photodegradation rate than that of the original bismuth tungstate (BWO), which corresponds to a high catalytic activity of 98.3% (k = 14.2×10-3 min-1) within 180 min. The excellent degradation performance can be attributed to two reasons: (1) The specific surface area of DMPBP is large (1386 m2 g-1), and the superstrong adsorption energy (-0.061 eV) of DMPBP[5] are much higher than that of BWO, which provide more adsorption sites;(2) Under the adsorption enhanced photocatalysis self-Fenton system, the production of H2O2 is greatly increased, and the concentration of H2O2 can be accumulated to 5.506 μM within 120 min, which is about 90.3 times and 9.25 times higher than that of BWO and BWO-D7, respectively. The system presented here provides new insights into the efficient and environmentally friendly removal of refractory organic contaminants. © 2023, The Authors. All rights reserved.

关键词： Adsorption

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Efficient Degradation of Ciprofloxacin in Wastewater by Cufe2O4/Cus Photocatalyst Activated Peroxynomosulfate

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SSRN 2023年

作者： Jia, Xinyu Zhang, Jinhui Huang, Qinglin Xiong, Chunyu Ji, Haixia Ren, Qifang Jin, Zhen Chen, Shaohua Wanmi, Guo Jing, Chen Ge, Yao Ding, Yi Anhui Advanced Building Materials Engineering Laboratory Anhui Jianzhu University Anhui Hefei230601 China Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse Anhui Jianzhu University China Key Laboratory of Huizhou Architecture in Anhui Province Anhui Jianzhu University Anhui Hefei230022 China State Key Laboratory of Silica Sand Resources Utilization Anhui Hefei230022 China

In this study, CuFe2O4/CuS composite photocatalysts were successfully synthesized for the activation of peroxynomosulfate to remove ciprofloxacin from wastewater. The structural composition and morphology of the materials were analyzed by XRD, SEM, TEM and Raman spectroscopy. The electrochemical properties of the samples were tested by electrochemical workstation. The band gap of the samples was calculated by DFT and compared with the experimental values. The effects of different catalysts, oxidant PMS concentration and coexisting ions on the experiments were investigated. The reusability and stability of the photocatalysts were also investigated. The mechanism of the photocatalytic degradation process was proposed based on the free radical trapping experiment. The intermediates in the degradation process were tested by liquid chromatography-mass spectrometry (LC-MS), and the molecular structure characteristics of ciprofloxacin were analyzed by combining with DFT calculations, and the possible degradation pathways of pollutants were proposed. This study reveals the important application of the photocatalyst CuFe2O4/CuS in the activation of PMS for the degradation of ciprofloxacin wastewater. © 2023, The Authors. All rights reserved.

关键词： Antibiotics

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Fabrication of an Ag-Based Sers Nanotag for Histamine Quantitative Detection

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SSRN 2022年

作者： Zhang, Tingting Wang, Gongying Bao, Juan Liu, Chang Li, Weihua Sun, Xiuyun Li, Jiansheng Lu, Rui Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological Engineering Nanjing University of Science and Technology Nanjing210094 China Information Materials and Intelligent Sensing Laboratory of Anhui Province Anhui University Hefei230601 China School of Environment and Energy Engineering Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse Anhui Jianzhu University Hefei230601 China

A crucial issue in analytical science and physiology is the detection of histamine with high sensitivity, specificity and credibility, which served as an important neurotransmitter in biofluids. Despite the high sensitivity of surface-enhanced Raman spectroscopy (SERS) at the level of single molecule, there are still challenges in providing high sensitivity for histamine with a small cross section. For the selective detection of histamine using SERS, a highly sensitive sandwich structure substrate combining Fe3O4 and an Ag-based SERS nanotag was developed. The Fe3O4@SiO2-COOH served as a capture component for enriching histamine. Upon functionalized Ag nanoparticles with glycine (Gly) and (3-Aminopheyonyl) boronic acid (APBA), they were then used to connect with histamine and serve as a SERS nanotag, respectively. A linear relationship between the Raman intensity and the histamine concentration was observed over the range 10-4-10-8 M with a limit of detection of 7.24×10-9 M. This methodology also exhibited good selectivity in the presence of other neurotransmitters. With our new approach, histamine can be detected sensitively and reliably in fish samples, which indicates the potential prospect of an effective method for analyzing histamine in complex specimens. © 2022, The Authors. All rights reserved.

关键词： Magnetite

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The Impact of Indian Endosulfan Usage on China's Environment

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SSRN 2022年

作者： Guo, Liang Gu, Chen Huang, Tao Gao, Hong Zhao, Yuan Mao, Xiaoxuan Ma, Jianmin Key Laboratory for Environmental Pollution Prediction and Control Gansu Province College of Earth and Environmental Sciences Lanzhou University Lanzhou730000 China State Key Laboratory of Pollution Control & Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China Laboratory for Earth Surface Process College of Urban and Environmental Sciences Peking University Beijing100871 China

Endosulfan, as an organochlorine pesticide (OCPs), was widely used in agriculture. As the largest endosulfan user country in the world, India’s endosulfan usage could influence the environment in its surrounding regions, such as China. In this study, we established gridded endosulfan usage, atmospheric emission, and soil residue inventories in 2010 based on its application in different crops in China and India. We simulated atmospheric and soil concentrations, as well as dry and wet deposition flux of α- and β-endosulfan. Results were used to assess the impact of Indian endosulfan usage on the China's environment by using an atmospheric transport model CanMETOP. In 2010, endosulfan usage was 3083.9 tonnes in China and 3204.8 tonnes in India. Higher endosulfan usage, atmospheric emission and soil residue identified in the regions across Gujarat and Himachal Pradesh, central Maharashte, and eastern Madhya Pradesh in India, and Henan, southern Hebei, eastern Shandong, and part of eastern Xinjiang in China. The spatial distribution of modeled atmospheric and soil concentrations, and dry deposition fluxes of endosulfan were in line with endosulfan usage but the wet deposition fluxes were mainly identified in Southern China and Sichuan basin with heavy rainfall, especially for α-endosulfan. Endosulfan tended to transport from India to Tibetan plateau, Yunnan-Kweichow Plateau, and some provinces in southern China, such as Yunnan, Guangxi, Guangdong, Hainan, and Taiwan under the Indian monsoon regime. Compared with β-endosulfan, α-endosulfan exhibited more significant impact on China’s environment due to higher volatility. Although the rainfall during Indian monsoon weakened the impact of Indian endosulfan usage on the endosulfan contamination in China, overall, Indian endosulfan usage contributed more than 50% of atmospheric concentrations and 30% of soil concentrations of α-endosulfan in some regions in Tibetan plateau. © 2022, The Authors. All rights reserved.

关键词： Deposition

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A Blind Spot of Efficient Anaerobic Reactor: Ecological Distribution of Anaerobic Granular Sludge

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SSRN 2023年

作者： Chen, Wenda Tang, Huiming Xu, Dongdong Li, Wenji Pan, Chao Guo, Leiyan Kang, Da Hu, Baolan Zheng, Ping Zhang, Meng Department of Environmental Engineering College of Environmental & Resource Sciences Zhejiang University Hangzhou China Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Hangzhou China National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Engineering Research Center of Beijing Beijing University of Technology Beijing China

The practical organic loading rates (OLRs) of anaerobic reactors are usually lower than expectation, indicating an uncovered crux to be revealed. Herein, two anaerobic reactors with (EAR) and without (PAR) vertical partition setting were developed. It was found that EAR achieved a much higher OLR than PAR (>100 vs 45 kg/m3·d). Further, the vertical distribution characteristics of anaerobic granular sludge were different, which could be ascribed to two vertical distribution patterns of ecological and physical distributions dominated in EAR and PAR. Generally, habitat selection could promote the ecological distribution via substrate availability, resulting in a high OLR. While hydraulic selection enhanced the physical distribution via granule settleability, causing negative effects on the habitat selection. Therefore, the vertical partition set in EAR weakened the hydraulic selection by restricting liquid back-mixing and granule migration, leading to its good performance. This study could offer a novel concept for reactors' development towards high OLRs. © 2023, The Authors. All rights reserved.

关键词： Ecosystems

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reuse of Gypsum Hemihydrate: Effect of Different Retarding Agents on the Hydration-Crystallization Process of Β-Hemihydrate Gypsum

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SSRN 2025年

作者： Ding, Yi Hui, Yi Zhang, Jinhui Ren, Qifang Huang, Kai Chen, Ranran Huang, Qinglin Ji, Haixia Wang, Yanyan Anhui Jianzhu University China Anhui Province Engineering Laboratory of Advanced Building Materials Anhui Jianzhu University Anhui Hefei230601 China Anhui Province Key Laboratory of Advanced Building Materials Anhui Jianzhu University Anhui Hefei230601 China Key Laboratory of Huizhou Architecture in Anhui Province Anhui Jianzhu University Anhui Hefei230601 China College of Civil Engineering Anhui Jianzhu University Anhui Hefei230601 China Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse Anhui Jianzhu University Anhui Hefei230601 China Anhui Institute of Building Research & Design Anhui Hefei230601 China

This study investigates the viability of employing various retardants, namely wheat hydrolyzed protein (GEM), carboxymethylcellulose sodium (CMC-Na), inorganic retarders such as borax (PS), and sodium tripolyphosphate (STPP), to serve as multifaceted retarding agents for calcined 180°C β-hemihydrate gypsum (β-HH). Characterization methods such as X-ray powder diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and TAM-Air Thermal Analysis of Hydration (TAM-Air) showed that the four retarders had a delaying effect on the hydration of β-HH. Notably, CMC-Na demonstrated a more pronounced retardation effect compared to other retarders, with PS and GEM exhibiting the least favorable impact on the setting time extension. The integration of retarders had a deleterious impact on the strength characteristics of gypsum. The inclusion of retarders induced alterations in the crystal morphology of gypsum, typically characterized by needle-like or flaky dihydrate gypsum (DH) crystals. Nevertheless, the crystals exhibited a shift towards shorter and larger forms with the progressive addition of admixtures. Furthermore, an escalation in both water absorption of gypsum was evident with an increase in retarder content. Molecular dynamics simulations further showed that due to the interaction of the four retardants with Ca2+ ions, the four showed different conformations in supersaturated calcium sulphate solution and affected their solvent accessible surface area (SASA). Among them, CMC-Na showed the most significant decrease in SASA value, indicating the strongest interaction with Ca2+ ions and the longest β-HH setting time. © 2025, The Authors. All rights reserved.

关键词： Fourier transform infrared spectroscopy

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Numerical modeling and parametric analysis of temperature distribution in soil based on water content variation under radio frequency heating for in-situ thermal remediation

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Science of the Total Environment 2024年 957卷 177267页

作者： Qi, Wenhao Lou, Wei Sheng, Anxu Xu, Wenjie Luo, Yongqiang Wu, Haibin Yin, Hao Chen, Jing Wu, Xiaohui Wang, Linling Hubei Key Laboratory of Multi-media Pollution Cooperative Control in Yangtze Basin School of Environmental Science and Engineering Huazhong University of Science and Technology Wuhan430074 China Hunan Provincial Engineering Research Center for Resource Recovery and Safe Disposal of Industrial Solid Waste Hunan Hikee Environmental Technology Co. Ltd. Changsha410032 China Institute of Resources and Environmental Engineering Shanxi University Taiyuan030006 China Yellow River Laboratory of Shanxi Province Taiyuan030006 China

Radio frequency heating (RFH) is recognized as an efficient and economical method for volatilizing organic pollutants from contaminated soils. Although some numerical simulations have been conducted to predict temperature changes during RFH, models that account for effects of water content (WC) variation on dielectric properties and temperature evolution in soil were rarely reported. To address this, a three-dimensional numerical model integrating electromagnetic-thermal conversion, heat transfer, and mass transfer was developed with coupling dynamic changes in WC and corresponding impacts on soil properties. The effects of soil types and RFH engineering parameters on temperature evolution and energy utilization were evaluated. The model's temperature prediction was validated using experimental data, indicating that temperature decreases outward from hot electrode, with high-temperature regions forming at the top and bottom regions near electrode. Water evaporation in soil causes a temperature plateau with >76.25 % of energy utilized for heating and evaporating water during 60-d RFH. Moreover, higher soil WC could increase electromagnetic-thermal conversion capability, counteracting the negative impact of increased specific heat capacity on temperature rise. Thermophysical properties of soil are crucial in RFH: sand, with lower specific heat capacity and higher thermal conductivity, results in faster heating rates. While, clay, with higher density and specific heat capacity, results in lower heating rates but greater energy utilization efficiency. Low-power RHF and wider well spacing improve the uniformity of temperature distribution but require more time to reach target temperatures. Moreover, input power influences the magnitude and timing of optimal energy utilization efficiency, while well spacing primarily affects timing. The models developed in this study provide essential guidance for RFH-based soil remediation projects. © 2024

关键词： Well spacing

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Recovering chromium from electroplating sludge using an integrated technology of bipolar membrane electrodialysis and H2O2 oxidation

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Chemosphere 2024年 366卷 143450页

作者： Lian, Rui Liu, Yaoxing Pan, Yan Ding, Jianguo Wu, Xiaoyun Lv, Mingzhi Wu, Xiaoyu Chen, Riyao Ding, Rui Liu, Jianxi Van der Bruggen, Bart College of Environmental and Resource Sciences College of Carbon Neutral Modern Industry Fujian Key Laboratory of Pollution Control & Resource Reuse Fujian Normal University Fujian Province Fuzhou350117 China School of Safety and Environment Fujian Chuanzheng Communications College Fujian Province Fuzhou350007 China Department of Chemical Engineering ProcESS-Process Engineering for Sustainable System KU Leuven Celestijnenlaan 200F LeuvenB-3001 Belgium Faculty of Engineering and the Built Environment Tshwane University of Technology Private Bag X680 Pretoria0001 South Africa

Chromium electroplating produces Cr(III)-containing electroplating sludge (EPS) in large volumes, which is easily oxidised to Cr(Ⅵ) and is harmful to the environment and human health. This study recovered Cr(III) as Na2CrO4 from EPS using an integrated bipolar membrane electrodialysis (BMED)–H2O2 oxidation technology. During the treatment process, Cr(III) was oxidised to Cr(VI) using H2O2 in an alkaline environment, BMED was used to separate and recover Cr(VI). Experimental results showed that H2O2 dosage and pH affected Cr(III) oxidation—the highest Cr(III) oxidation ratio of 68.4% was observed when H2O2 dosage and pH were 5.5 mL and 12.0, respectively. The current density, solid/liquid ratio and sludge particle size affected Cr(III) recovery, energy consumption and current efficiency. Under a current density of 20.0 mA/cm2, solid/liquid ratio of 1.0:45 and sludge particle size of 100 mesh, 58.2% of Cr(III) was recovered. When the number of the equipped EPS compartments was increased from one to two and three, the specific energy consumption decreased from 1.04 to 0.87 and 0.81 kW h/g, respectively, but the current efficiency remained almost constant. After EPS treatment, the Cr(III) remaining in the sludge was mainly in the residual state, which is less environmentally harmful. The obtained Na2CrO4 had similar properties according to X-ray diffraction analysis. Thus, the proposed integrated technology effectively recovers Cr(III) from EPS and other chromium-containing solid wastes. © 2024 Elsevier Ltd

关键词： X ray diffraction analysis

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The Inactivation of Antibiotic-Resistant Bacteria and the Damage of Antibiotic-Resistant Genes Using an Electrified Carbon Nanotube Membrane-Naclo System

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SSRN 2022年

作者： Wang, Yan Ni, Xiaoyu Hou, Xuan Ma, Defang Zhang, Bo Li, Qian Gao, Baoyu Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao266237 China Technology Center China Tobacco Hunan Industrial Co.Ltd. Changsha410007 China

Inactivation of antibiotic-resistant bacteria (ARB) and damage of antibiotic resistance genes (ARGs) in aquatic environments have become a major concern worldwide to control the rapid spread of antibiotic resistance. In this study, an electrified carbon nanotube membrane (ECM) was combined with chlorine disinfection (denoted as ECM-NaClO system) to treat the sulphonamide resistance bacteria ( HLS-6 ) and tetracycline resistance bacteria ( TOP-10F ) in water samples. The ECM-NaClO system effectively inactivated the HLS-6 and TOP-10F by damaging the cell membrane and increasing amounts of intracellular reactive oxygen species (ROS). In addition, the absolute abundances of sulphonamide resistance gene ( sul1 ) and tetracycline resistance gene ( tetA ) in the effluent decreased by 3.5 and 1.7 logs, respectively. Furthermore, the absolute abundances of mobile genetic elements ( intI1 ) decreased by 4.1–4.7 logs. The ROS probe compound degradation and quenching experiments revealed that the •OH generated via the 2-electron oxygen reduction reaction played a dominant role in the damage of sul1 gene, while •O 2 - generated through the activation of NaClO was a key contributor to the damage of tetA gene. Hence, the ECM-NaClO system is a potential method to inactivate ARB and damage ARGs in water and sewage treatment plants. © 2022, The Authors. All rights reserved.

关键词： Bacteria

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reuse of Gypsum Hemihydrate: Effect of Different Retarding Agents on the Hydration-Crystallization Process of Β-Hemihydrate Gypsum

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SSRN 2024年

作者： Ding, Yi Hui, Yi Zhang, Jinhui Ren, Qifang Huang, Qinglin Ji, Haixia Xu, Wei Wang, Yanyan Sun, Qiqi Zhang, Zuhua Huang, Kai Anhui Province Engineering Laboratory of Advanced Building Materials Anhui Jianzhu University Anhui Hefei230601 China Anhui Province Key Laboratory of Advanced Building Materials Anhui Jianzhu University Anhui Hefei230601 China Key Laboratory of Huizhou Architecture in Anhui Province Anhui Jianzhu University Anhui Hefei230601 China College of Civil Engineering AnHui JianZhu University Anhui Hefei230601 China Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse Anhui Jianzhu University Anhui Hefei230601 China Anhui Jianzhu University China Tongji University Sch Mat Sci & Engn Shanghai210041 China

This study investigates the viability of employing various retardants, namely wheat hydrolyzed protein (GEM), sodium carboxymethyl cellulose (CMC-Na), inorganic retarders such as borax (PS), and sodium tripolyphosphate (STPP), to serve as multifaceted retarding agents for calcined 180°C β-hemihydrate gypsum (β-HH).The setting time, strength, density, water consumption for standard consistency, water absorption, and softening coefficient of gypsum doped with different retarders were investigated by the characterizations such as X-ray powder diffractometer (XRD), fourier infrared spectroscopy, scanning electron microscope, and TAM-Air hydration heat analysis. The findings indicate that the inclusion of retarders effectively extended the setting time of phosphogypsum (PG). The extent of setting time prolongation exhibited a positive correlation with the escalating proportion of retarder. Notably, sodium carboxymethyl cellulose demonstrated a more pronounced retardation effect compared to other retarders, with borax exhibiting the least favorable impact on the setting time extension. The integration of retarders had a deleterious impact on the strength characteristics of gypsum. The inclusion of retarders induced alterations in the crystal morphology of gypsum, typically characterized by needle-like or flaky dihydrate gypsum (DH) crystals. Nevertheless, the crystals exhibited a shift towards shorter and larger forms with the progressive addition of admixtures. Furthermore, an escalation in both water absorption and the softening coefficient of gypsum was evident with an increase in retarder content. © 2024, The Authors. All rights reserved.

关键词： Gypsum

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