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SSRN 2024年

作者： Yang, Hongwei Wang, Jie Mo, Rumeng Hu, Pengxiang Liu, Xiangrong Liu, Yingliang Cui, Jianghu Xiao, Yong Key Laboratory for Biomass Materials and Energy of Ministry of Education Guangdong Provincial Engineering Technology Research Center for Optical Agriculture College of Materials and Energy South China Agricultural University Guangzhou510642 China Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management Guangdong Institute of Eco-environmental Science & Technology Guangzhou510650 China National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangzhou510650 China Shaoyang Branch of Hunan tobacco Corporation Shaoyang422000 China Intelligent Connected Vehicle Traffic Accident Investigation and Reconstruction Standard Laboratory of Beijing Public Security Bureau Police College Road Traffic Management Department of Beijing Police College Beijing102202 China

Immobilization of Cd in soil is a complex systematic process in which biochar materials and experimental conditions need to be selected from an infinite space of candidates. Exploration of the entire space is not feasible due to the large number of repeated experiments required. In this study, we propose a strategy for deeply integrating AI techniques to determine the biochar properties and experimental conditions for achieving maximum immobilisation rates under specific soil conditions. We developed six interpretable tree models, among which the LSBoost model performed best. In addition, we developed a Graphical User Interface (GUI) through which soil properties can be manually entered and Bayesian algorithms applied. This allowed us to inversely extrapolate the experimental conditions that achieved maximum carbon sequestration rates under these soil conditions. Then, we use these conditions to link with OpenAI and utilize ChatGPT to obtain detailed experiment plans, which are displayed on the GUI interface for researchers' reference. © 2024, The Authors. All rights reserved.

关键词： Soils

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Seasonal Pulse Effect of Microplastics of Surface Water in River Catchment - from Tributary Catchment to Mainstream

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SSRN 2022年

作者： Xia, Feiyang Tan, Qian Cai, Yanpeng Wang, Dunqiu Zhang, Jun Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watershed School of Ecology Environment and Resources Guangdong University of Technology Guangzhou510006 China Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology Guilin University of Technology Guilin541004 China College of Environmental Science and Engineering Guilin University of Technology Guilin541004 China

关键词： Catchments

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Seasonal Pulse Effect of Microplastics of Surface Water in River Catchment-From Tributary Catchment to Mainstream

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SSRN 2022年

作者： Xia, Feiyang Tan, Qian Wang, Dunqiu Zhang, Jun Cai, Yanpeng Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watershed School of Ecology Environment and Resources Guangdong University of Technology Guangzhou510006 China Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology Guilin University of Technology Guilin541004 China College of Environmental Science and Engineering Guilin University of Technology Guilin541004 China

关键词： Microplastic

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Migration of Nanocolloid-Carrying Antibiotics in Paddy Red Soil During Organic Fertilization Process

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SSRN 2023年

作者： Jiang, Yu Zhang, Yifei Liang, Yuanyuan Liu, Wen Wang, Yu Yang, Jiewen Qiu, Rongliang Di, Hong J. Dan, A. Engineering and Technology Research Center Agricultural Land Pollution Integrated Prevention and Control Guangdong Higher Education Institute College of Resources and Environment Zhongkai University of Agriculture and Engineering Guangzhou510225 China Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety College of Natural Resources and Environment South China Agricultural University Guangzhou510642 China Soil & Physical Science Department Lincoln University Lincoln Christchurch7647 New Zealand

Nanocolloid particles in soil are highly mobile and can act as carriers to transport pollutants such as antibiotics to a wider and deeper range of soils and even underground aquifers. Although nanocolloids play a crucial role on the migration of antibiotics, the inherent behavior and mechanism of nanocolloid-carrying antibiotics in soil remains unclear. In this study, we conducted a comprehensive investigation on the migration of antibiotics in paddy red soil, carried by four common soil nanocolloids, namely kaolin (KL), montmorillonite (MT), hematite (HT) and humic acid (HA). The results showed that organic nanocolloids (i.e., HA) and mineral nanocolloids (i.e., HT) facilitated the soil adsorption of antibiotics, whereas clay nanocolloids (i.e., MT and KL) did not. Nanocolloid carriers not only promoted the vertical transfer of antibiotics within the same medium (from the soil surface to bottom), but also enhanced their horizontal transfer between different mediums (from organic fertilizers to soil). Moreover, the migration mechanisms of antibiotics carried by various nanocolloids were also different: the phenolic hydroxyl and carboxyl groups of HA could esterify with the carboxyl groups of quinolones and the phenolic hydroxyl groups of tetracyclines, respectively;the oxygen atoms of HT formed stabilizing complexes with the soil, which could further adsorb antibiotics using their functional group-rich complexes;smaller antibiotic compounds could be adsorbed in the metal oxide interlayer of MT via cation exchange, while KL could adsorb antibiotics on its metal oxide surface layer through the same way but was susceptible to be desorbed. © 2023, The Authors. All rights reserved.

关键词： Antibiotics

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Cadmium Accumulation in Farmlands Through Deposition or Irrigation: Evidence from Multimedia Fate Modelling and Scenario Simulations

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SSRN 2022年

作者： Liu, Yang Shi, Lin Zhang, Di Wang, Jing He, Liping Niu, Xuekui Pan, Bo Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection College of Resources and Environment Linyi University Linyi276005 China Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control Faculty of Environmental Science and Engineering Kunming University of Science and Technology Kunming650500 China Yunnan Academy of Ecological Environment Sciences Kunming650034 China

The evaluation of heavy metal pollution in farmland soil is of great significance for sustainable agriculture management. However, debate on the primary pollution migration pathways to crops has greatly retarded remediation strategies. Hence, the flux of heavy metals should be identified with precision for targeted pollution control. In this study, a catchment downstream of a metal mining area in Yunnan Province was selected for investigation of Cd pollution in the topsoil of farmlands, including the input and output fluxes in different environmental media. The results showed that Cd concentrations exceeded the risk screening value in 67.8% of the farmland soil samples. Irrigation was the main input source of Cd to soil, accounting for more than 75% of the total input fluxes, in which the contribution of dissolved Cd in water was 1–2 orders of magnitude higher than that of Cd adsorbed on suspension particles. Crop harvesting, surface runoff, and leaching were the main Cd output pathways from this area. Cd concentration in the studied area was also dynamically predicted in 2050 under different scenarios. The prediction showed that Cd in farmland soil in the study area would be in a cumulative state in the following years. Straw removing could significantly reduce Cd accumulation in farmland soil. Thus, the substantial increase of crop yield in the future would benefit Cd output flux through crop harvesting. This work will guide decision-making for the establishment of targeted remediation strategies for Cd pollution in farmland soil. © 2022, The Authors. All rights reserved.

关键词： Irrigation

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Differentiated Strategies of Animal-Derived and Plant-Derived Biochar to Reduce Nitrogen Loss During Paper Mill Sludge Composting

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SSRN 2022年

作者： Liu, Xiaoming Wang, Yueqiang Zhou, Shaoqi Cui, Peng Wang, Weiwu Huang, Wenfeng Yu, Zhen Zhou, Shungui National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangdong Key Laboratory of Integrated Agroenvironmental Pollution Control and Management Institute of Eco-environmental and Soil Science Guangdong Academy of Sciences Guangzhou510650 China College of Resources and Environmental Engineering Guizhou University Guizhou 550025 China Guangdong Provincial Engineering and Technology Research Center for Agricultural Land Pollution Prevention and Control Zhongkai University of Agriculture and Engineering Guangzhou510225 China Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and Environment Fujian Agriculture and Forestry University Fuzhou350002 China

Biochar is widely used to increase nitrogen (N) retention during composting. However, the differences in the regulation of N cycling between animal-derived biochar and plant-derived biochar remain unclear. In this study, three treatments were established, including CK (no biochar), ABC (spiked animal-derived biochar), and PBC (spiked plant-derived biochar). Results showed that N loss was reduced by 24.4% and 35.5% in ABC and PBC, respectively, compared with CK. Moreover, the contents of acid-insoluble-N (AIN) in ABC and bioavailable organic N (BON) in PBC were higher than in CK. The protease activity and bacterial communities associated with organic N degradation increased in ABC, which contributed to the generation of humic N-containing precursors. Decreased urease activity and enhanced N-fixation were found in PBC. Structural equation model confirmed that BON retention and AIN formation were the dominant strategies for animal-derived and plant-derived biochar, respectively. The findings provided multiple pathways to produce N-enriched compost products. © 2022, The Authors. All rights reserved.

关键词： Animals

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Cyclic Endogenous Electron Donors-Driven Total Nitrogen Self-Purification: A Practice with Coking Wastewater

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SSRN 2024年

作者： Chen, Acong Chen, Yao Guan, Xianghong Qin, Zhi Zhang, Heng Huang, Hua Wei, Gengrui Weia, Tuo Li, Zemin Qiu, Guanglei Wu, Haizhen Wei, Chaohai School of Environment and Energy South China University of Technology Guangdong Guangzhou510006 China Guangdong Polytechnic of Water Resources and Electric Engineering Guangdong Guangzhou510635 China Guangxi Key Laboratory of Sericulture Ecology and Applied Intelligent Technology Hechi University Guangxi Hechi546300 China School of Environment South China Normal University Guangdong Guangzhou510006 China SchoolofBiologyandBiologicalEngineering SouthChinaUniversityofTechnology Guangdong Guangzhou510006 China School of Environment and Energy Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling South China University of Technology Guangdong Guangzhou510006 China

Conventional nitrification/denitrification processes driven by external carbon sources inevitably consume massive amounts of energy and materials. Wastewater contains a wealth of resources that can be utilized as electron donors for denitrification. This study demonstrated and implemented a pre-physicochemical precipitates-driven total nitrogen self-purification via a system of pre- and post-physicochemical synergistic Oxic - double Hydrolytic & Denitrification - Oxic (dual-physicochemical OHHO) in the case of coking wastewater. In the batch tests and pilot-scale operational analyses, sulfurs- and cyanides-metabolizing autotrophic microorganisms were found to be enriched and gradually dominated the biotope with a nitrogen removal load of 0.058–0.066 g-N/L/d. Further, in the context of endogenous electrons (normalized to cyanides and sulfides) embedded in coking wastewater on a nationwide scale (1.15×1011 mol-e/a), a novel denitrification was proposed to alter electrons flows through the elements and substances cycling, and multiple resource-utilization and self-purification pathways driven by wastes cycle were predicted on a regional scale. Moreover, the practice of self-purification whereby internal circulation can be defined by the convolution of matrices, quantitatively expressing the indeterminate process of water. In conclusion, the self-purification of wastes driven by the internal circulation will promote sustainable development of materials and resource-compensated energy conversions within the levels of substance/process-plant/factory-industry/region. © 2024, The Authors. All rights reserved.

关键词： Denitrification

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Enhanced Cr(VI) removal by nanoscale zerovalent iron through biogenic sulfidation:Comparison against corresponding chemical sulfidation

Cleaner Chemical Engineering

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Cleaner Chemical Engineering 2025年 11卷

作者： Yanni Xi Zheng Peng Zhuang Zhang Zhu Su Yicai Huang Xin Li Xingzhong Yuan Hunan Provincial Key Laboratory of Water Pollution Control Technology Hunan Research Academy of Environmental Sciences Changsha 410002 PR China State Environmental Protection Key Laboratory of Monitoring for Heavy Metal Pollutants Changsha 410014 PR China Key Laboratory of Environmental Biology and Pollution Control Ministry of Education College of Environmental Science and Engineering Hunan University Changsha 410082 PR China

This study examines the effects of biogenic sulfidation and chemical sulfidation on the reactivity of nanoscale zerovalent iron (nZVI) for the removal of carcinogenic hexavalent chromium (Cr(VI)). Biogenic sulfidated nanoscale zerovalent iron (BS-nZVI) was synthesised by culturing nZVI with sulphate-reducing bacteria (SRB), while chemically synthesised sulfidated nanoscale zerovalent iron (CS-nZVI) was produced using a Na 2 S solution. Characterisation results indicated that both BS-nZVI and CS-nZVI were coated with FeS x , with BS-nZVI additionally covered by extracellular polymeric substances (EPS) secreted by the SRB. Both BS-nZVI and CS-nZVI exhibited significantly higher Cr(VI) removal efficiencies compared to nZVI, with values of 18.91 mg/g and 18.80 mg/g, respectively, versus 0.095 mg/g for nZVI. These improvements are attributed to the enhanced electron transfer properties of FeS x . In cyclic “sulfidation-Cr(VI) removal” experiments, biogenic sulfidation was found to be more effective than chemical sulfidation in enhancing and reactivating the Cr(VI) removal capacity of nZVI. The EPS associated with S-nZVI provided additional binding sites for co-precipitation of Cr(III)-Fe(III) during Cr(VI) removal, resulting in the formation of a loosely structured Cr(III)-Fe(III)-EPS co-precipitate. This co-precipitate mitigated the hindering caused by dense Cr(III)-Fe(III) passivation layers on electron transfer during Cr(VI) removal and cyclic sulfidation, in contrast to CS-nZVI. This study elucidates the synergistic effects of the coupled SRB-ZVI system for Cr(VI) remediation.

关键词： Biogenic sulfidation Sulphate-reducing bacteria Zerovalent ion Extracellular polymeric substances Chromium

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Effects of long-term exposure to zinc on performances of anaerobic digesters for swine wastewater treatment under various organic loading rates

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Chemosphere 2024年 363卷 142843页

作者： Huang, Zhiwei Niu, Qiuya He, Shanying Li, Xiang Qian, Chongxin He, Yuxin Yang, Chunping Academy of Environmental and Resource Sciences School of Environmental Science and Engineering Guangdong University of Petrochemical Technology Guangdong Maoming525000 China Ministry of Education Hunan Changsha410082 China College of Environmental Science and Engineering Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling Zhejiang Gongshang University Zhejiang Hangzhou310012 China School of Environmental Science and Engineering Hainan University Hainan Haikou570228 China Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Jiangxi Nanchang330063 China

The long-term performance of anaerobic digestion (AD) often decreases substantially when treating swine wastewater contaminated with heavy metals. However, the toxicological characteristics and mechanisms of continuous exposure to heavy metals under different organic loading rates (OLR) are still poorly understood. In these semi-continuous AD experiments, it was found that zinc concentrations of 40 mg/L only deteriorated the reductive environments of AD. In comparison, a concentration of 2.0 mg/L probably facilitated the reproduction of microorganisms in the operating digesters with a constant OLR of 0.51 g COD/(L·d). Nevertheless, when the OLR was increased to 2.30 g COD/(L·d), 2.0 mg/L zinc inhibited various life activities of microorganisms at the molecular level within only 10 days. Hence, even though 2.0 mg/L zinc could promote AD performances from a macroscopic perspective, it had potential inhibitory effects on AD. Therefore, this study deepens the understanding of the inhibitions caused by heavy metals on AD and the metabolic laws of anaerobic microorganisms in swine wastewater treatment. These results could be referred to for enhancing AD in the presence of zinc in practical swine wastewater treatment. © 2024 Elsevier Ltd

关键词： Anaerobic digestion

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Experimental and Theoretical Identifications of Durable Fe–Nx Configurations Embedded in Graphitic Carbon Nitride for Uranium Photoreduction

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SSRN 2022年

作者： Wen, Tao Hong, Jiahui Ma, Ran Wu, Yunchao Liu, Yang Zhang, Sai Wang, Suhua Wang, Xiangke Ai, Yuejie MOE Key Laboratory of Resources and Environmental Systems Optimization College of Environmental Science and Engineering North China Electric Power University Beijing102206 China Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control School of Environmental Science and Engineering Guangdong University of Petrochemical Technology Guangdong Maoming525000 China

Uranium extraction from seawater has attracted increasing attentions for nuclear raw material to support the sustainable development of nuclear power plants. However, it is still a grand challenge to overcome the high salinity background and ultra-low uranyl concentration. Herein, we successfully achieved Fe-N x configurations embedded in graphitic carbon nitride (FeN x /g-C 3 N 4 ) through one-step pyrolysis strategy. Our density function theory (DFT) calculations reveal that the site-isolated FeN x centers are the predominant binding sites for U(VI) species, and visible-light photoexcitation can effectively facilitate the electron escaping from FeN x /g-C 3 N 4 surface relative to pure g-C 3 N 4 , which is consequently favorable for electron transfer in the photoreduction conversion of U(VI) to U(IV). Consistent with the theoretical results, the obtained FeN x /g-C 3 N 4 delivers remarkably higher reduction activity with the conversion efficiency of 99% and rate constant of 0.091 min -1 , almost 9.1 and 12.5 times faster than those of g-C 3 N 4 and TiO 2 catalysts, respectively. It is worthwhile to mention that FeN x /g-C 3 N 4 maintains a high level for the extraction of uranium from seawater, endowing the metal-N configurations embedded g-C 3 N 4 as a kind of promising candidate for the sustainable conversion of radionuclides. © 2022, The Authors. All rights reserved.

关键词： Iron compounds

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