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Sorption in Soils and Bioaccumulationof 2,2’-Dibbpa

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SSRN 2022年

作者： Yu, Yunjiang Sun, Bingbing Li, Beibei State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment South China Institute of Environmental Sciences Ministry of Ecology and Environment Guangzhou510530 China School of Environment Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control Ministry of Education Henan Key Laboratory for Environmental Pollution Control Henan Normal University Xinxiang453007 China

2,2’-DiBBPA is frequentlydetected in the environment. However, mobility of 2,2’-diBBPA in the soil environment is poorly examined. The present study examined the effects of soil components, dissolved organic carbon and heavy metal cations on adsorption of 2,2’-diBBPA on several types of agricultural soils. The adsorption isotherms on soils and soil components were well fitted to the linear isotherm equation. Under neutral conditions, soils with higher soil organic matter (SOM) exhibited greater adsorption capacity for 2,2’-diBBPA, indicating the significant contribution of SOM to the adsorption. The adsorption capacity of a given soil for 2,2’-diBBPA decreased with increasing pH due to the enhanced electrostatic repulsion between the anionic 2,2’-diBBPA and soils. Black carbon of soil organic carbon played a predominant role in the adsorption of 2,2’-diBBPA on soils. Metal ions significantly inhibited the adsorptive behavior of 2,2’-diBBPA under alkaline conditions. Dissolved organic carbon, iron oxide minerals, and phyllosilicate minerals exhibited a limited effect on 2,2’-diBBPA sorption. Biota-sediment accumulation factors (1.18-2.47) and logarithm of bioconcentration factors (2.49-2.52) of 2,2’-diBBPA in lugworms decreased and increased with increasing Kd, respectively. These findings indicate that mobility in soils and bioaccumulation of 2,2’-diBBPA is associated with soil SOM, pH, and heavy metals. © 2022, The Authors. All rights reserved.

关键词： Soils

Selective Recovery of Rare Earth Elements from Mine Wastewater Using the Magnetic Zeolite Prepared by Rare Earth Tailings

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SSRN 2025年

作者： Zhang, Jianhui Cheng, Jianchen Xu, Guizhou Hou, Xuechao Yu, Zhifei Liu, Wei Zhang, Yalan Chen, Jianxin Yang, Jiahao Wu, Mengting Yang, Wanqing Li, Simin Zhang, Meiyan Chen, Lijun Li, Zhiwen Zhang, Jiaxia Wu, Xinying Wang, Xinyi Xiao, Jinmei Xie, Xianchuan Key Laboratory of Poyang Lake Environment and Resource Utilization Engineering Research Center of Watershed Carbon Neutralization Ministry of Education School of Resource and Environment Nanchang University Nanchang330031 China China Electric Construction Group Jiangxi Electric Power Design Institute Co China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

The effective enrichment and recovery of rare earth elements (REEs) from wastewater holds significant practical value for both the sustainable utilization of REEs and the restoration of ecological environments. In this study, magnetic zeolite was successfully synthesized by using rare earth tailings (RET) as the raw material, with the addition of Fe3O4 to introduce a magnetic phase. Th magnetic zeolite exhibits high crystallinity, excellent thermal stability, substantial specific surface area of 483.8 m2/g, and rapid adsorption kinetics. The maximum adsorption capacities for La3+ and Ce3+ in aqueous solutions were determined to be 123.2 mg/g and 99.9 mg/g, respectively, with adsorption efficiencies remaining above 70% for La3+ and 80% for Ce3+ after six adsorption *** zeolite was effectively employed to recover REEs from real acid mine wastewater, with La3+ and Ce3+ recoveries exceeding 90%, and distribution coefficients (Kd) of 2681.7 mL/g and 5321.8 mL/g, respectively, demonstrating notable adsorption selectivity. Moreover, the magnetic zeolite can be easily separated using an external magnetic field, addressing the recovery challenges typically associated with conventional zeolite. Overall, through this technology, both the loss of REEs from wastewater and the environmental pollution caused by renewable energy technologies are addressed, thus presenting an effective strategy for simultaneous remediation. © 2025, The Authors. All rights reserved.

关键词： Tailings

Fish forewarning of comprehensive toxicity in water environment based on Bayesian sequential method

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Journal of environmental Sciences 2021年第12期33卷 150-159页

作者： Kaifeng Rao Li Tang Xin Zhang Heyu Xiang Liang Tang Yong Liu Wei Wang Jie Jiang Mei Ma Yiping Xu Zijian Wang State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Shenzhen Monitoring Centre of Ecology and Environment Shenzhen 518049China Department of Basic Courses Beijing Union UniversityBeijing 100101China Faculty of Mathematics and Statistics Hubei UniversityWuhan 430062China CASA(Wuxi)Environmental Technology Co.Ltd. Wuxi 214024China College of Resources and Environment University of Chinese Academy of SciencesBeijing 101407China

environmental impact of pollutants can be analyzed effectively by acquiring fish behavioral signals in water with biological behavior sensors. However, a variety of factors, such as the complexity of biological organisms themselves, the device error and the environmental noise, may compromise the accuracy and timeliness of model predictions. The current methods lack prior knowledge about the fish behavioral signals corresponding to characteristic pollutants, and in the event of a pollutant invasion, the fish behavioral signals are poorly discriminated. Therefore, we propose a novel method based on Bayesian sequential,which utilizes multi-channel prior knowledge to calculate the outlier sequence based on wavelet feature followed by calculating the anomaly probability of observed values. Furthermore, the relationship between the anomaly probability and toxicity is analyzed in order to achieve forewarning effectively. At last, our algorithm for fish toxicity detection is verified by integrating the data on laboratory acceptance of characteristic pollutants. The results show that only one false positive occurred in the six experiments, the present algorithm is effective in suppressing false positives and negatives, which increases the reliability of toxicity detections, and thereby has certain applicability and universality in engineering applications.

关键词： Bayesian sequential method Fish electrical signal Outlier detection Anomaly probability Time series forecasting

Human exposure to chromite mining pollution, the toxicity mechanism and health impact

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Heliyon 2024年第21期10卷 e40083页

作者： Khan, Changaiz Malik, Riffat Naseem Chen, Jing State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China Center of Atmospheric Environmental Studies Beijing Normal University Beijing 100875 China Environmental Biology and Ecotoxicology Laboratory Department of Environmental Sciences Faculty of Biological Sciences Quaid-i-Azam University Islamabad 45320 Pakistan

Significant amounts of toxic metal-containing mining waste are produced by chromium mining activities, along with the production of air pollutants. The presence of toxic metals in various environmental media including air, water, and soil, along with their chemical species such as hexavalent chromium, pose major health hazards for both directly exposed mining workers and the population residing near the mining areas. Highlighting the requirements for enhanced environmental protection and safety measures, this comprehensive review shed light on the global environmental pollution stemming from chromite mining activities. Based on the published literature, the study also investigated into the pollution caused by toxic metals and explored their probable health effects on exposed individuals. The exposure routes and the mechanisms of toxic metal induced carcinogenicity in the exposed groups were assessed. Additionally, the generated reactive species in exposed individuals and the toxicity mechanisms of hexavalent chromium were discussed. Considering these findings, this review proposed the necessity of cross-sectional biomonitoring studies involving occupationally exposed workers from chromite mining operations. The anticipated impact of this review is to influence the global and national chromite mining industry, instigating improvements in occupational settings, real-time pollution monitoring, and healthcare provisions for exposed workers. © 2024

关键词： Biomonitoring Mining pollution Occupational exposure Oxidative stress Toxicity mechanism

Global patterns and ecological drivers of taxonomic and phylogenetic endemism in angiosperm genera

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Plant Diversity 2024年第2期46卷 149-157页

作者： Hong Qian Brent D.Mishler Jian Zhang Shenhua Qian Research and Collections Center Illinois State Museum1011 East Ash StreetSpringfieldIL 62703USA University and Jepson Herbaria Department of Integrative BiologyUniversity of CaliforniaBerkeleyCA 94720-2465USA Center for Global Change and Complex Ecosystems Zhejiang Tiantong Forest Ecosystem National Observation and Research StationSchool of Ecological and Environmental SciencesEast China Normal UniversityShanghai 200241China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment Ministry of EducationChongqing UniversityChongqing 400045China

Endemism of lineages lies at the core of understanding variation in community composition among geographic regions because it reflects how speciation,extinction,and dispersal have influenced current ***,we investigated geographic patterns and ecological drivers of taxonomic and phylogenetic endemism of angiosperm genera across the *** identify centers of paleo-endemism and neo-endemism of angiosperm genera,and show that they are mostly located in the Southern Hemisphere in tropical and subtropical regions,particularly in Asia and *** categories of phylogenetic endemism centers can be differentiated using current climate *** climate,historical climate change,and geographic variables together explained~80%of global variation in taxonomic and phylogenetic endemism,while 42-46%,1%,and 15%were independently explained by these three types of variables,*** our findings show that past climate change,current climate,and geography act together in shaping endemism,which are consistent with the findings of previous studies that higher temperature and topographic heterogeneity promote *** study showed that many centers of phylogenetic endemism of angiosperms,including regions in Amazonia,Venezuela,and west-central tropical Africa that have not previously been identified as biodiversity hotspots,are missed by taxon-based measures of endemism,indicating the importance of including evolutionary history in biodiversity assessment.

关键词： Angiosperm Current climate Endemism Historical climate change Topographic heterogeneity

Study of Sediment Impacts on Flood Risk by Numerical Modeling

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SSRN 2022年

作者： Liu, Hongxi Du, Jizeng Yi, Yujun Advanced Institute of Natural Sciences Beijing Normal University Zhuhai Campus Zhuhai519087 China State Key Laboratory of Water Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China

Sediments seriously increase flood risk. The lack of sediment data, as well as uncertainty in sediment yield and transport modeling, hampers the incorporation of sediment into flood risk assessment/early-warning systems. In this study, we targeted a 10km reach that experienced a flash flood with high sediment inflows in 2019 and simulated sediment impacts on flood propagation and flood risk using a 1D hydraulic model. Two sediment inflow types were considered: sudden inflow from a debris flow and constant inflow from upstream. For the former type, different inflow times before, during and after the peak discharge were tested;for the latter type, different sediment concentrations and medium grain sizes were tested in the scenario design. Our results showed that when sediments inflowed into the reach in a short time, they greatly increased the water level by up to 3.7m in the reach near the inflow point (i.e., 500–700m upstream and downstream of the point). When sediments constantly inflowed from upstream, they influenced the water level of the whole reach but raised the water level by up to 1.2m in the cross-sections, which showed strong bed aggradation. Sudden sediment inflow influenced the reach near the inflow point and might increase its flood risk to the highest level, whenever it occurred before, during or after the peak discharge. Constant sediment inflow affected little the flood risk of the peak discharge but increased the risk afterward when the sediment concentration was higher than 40 kg m-3 . Cross-sections showing increased flood risk were characterized by decreasing bed slopes or increasing widths. In view of the impacts of different sediment inflow types on flood risk, we developed a method to identify potential sediment risk. Together with current risk assessment by water flow, we proposed a framework to incorporate sediment into flood risk assessment. © 2022, The Authors. All rights reserved.

关键词： Sediments

Carbamazepine degradation by visible-light-driven photocatalyst Ag_(3)PO_(4)/GO:Mechanism and pathway

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environmental Science and Ecotechnology 2022年第1期9卷 17-26页

作者： Guanhan Chen Wenyi Dong Hongjie Wang Zilong Zhao Feng Wang Feifei Wang Cesar Nieto-Delgado School of Civil and Environmental Engineering Harbin Institute of Technology ShenzhenShenzhen518055PR China Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control Shenzhen518055PR China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090PR China Division de Ciencias Ambientales Instituto Potosino de Investigacion Científica y TecnologicaIPICyT.Camino a la Presa San Jose 2055.San Luis PotosíSLP 78216Mexico

Carbamazepine(CBZ),as one of the most frequently detected pharmaceuticals,is of great concern due to its potential impact on the ecosystem and human *** study provides an effective approach to remove CBZ by using photocatalyst silver phosphate combined with graphene oxide(Ag_(3)PO_(4)/GO)under visible *** morphology,composition,and optical properties of Ag_(3)PO_(4)/GO were characterized employing SEM,XRD,and *** oxide could improve the visible-light utilization and promote electron's charge to enhance the photocatalytic performance of Ag_(3)PO_(4)/*** the optimal reaction condition of 5.86 mW/cm_(2)light intensity,15-25℃ temperature,5-7 pH,and 0.5 mg/L catalytic dosages,5 mg/L CBZ could be completely degraded in 30 min,and the apparent rate constant could reach 0.12 min^(-1).Additionally,the radical trapping experiments indicated·OH and O_(2)^(-)· were the main reactive oxygen species employed to eliminate *** decay pathways of CBZ had been proposed accordingly,and the main product was the low-molecular products.

关键词： Carbamazepine Ag_(3)PO_(4)/GO Visible light Photocatalysis

Preparation and Properties of The Persulfate Gel Materials And Application for The Remediation Of 2,4-Dinitrotoluene Contaminated Groundwater

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SSRN 2022年

作者： Xu, Xiangjian Wan, Shuoyang Xia, Fu Han, Xu Deng, Sheng Xiao, Han Jiang, Yonghai Liu, Hui Yang, Yu State Key Laboratory of Environmental Criteria and Risk Assessment and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing100012 China

Persulfate (S 2 O 8 2- ) is a strong oxidant that is widely used for treating organic contamination of groundwater. This study aims to develop persulfate gel sustaining-release material (PGSR) and gelatin-gel sustaining-release material (G-PGSR) that can be injected into aquifers via wells and slowly release S 2 O 8 2- to groundwater. In this study, compatibility and miscibility of colloidal silica gels and gelatin with S 2 O 8 2- were tested. Morphologies of the as-prepared PGSR and G-PGSR were observed by scanning electron microscope (SEM) and Fourier transform infrared spectrometer (FT-IR). Release characteristics of PGSR containing variable persulfate concentrations (from 1.25 wt% to 5 wt%), silica sol (from 30 wt% to 40 wt%), and gelatin (from 0.5 wt% to 2.0 wt%) were monitored. The PGSR and G-PGSR exhibited a two-phase process in viscosity: a progressive phase characterized by gradually increase in viscosity followed by a gradually decrease phase. The maximum release rates achieved at 5 h in G-PGSR were similar to that in PGSR. The release persulfate concentrations in G-PGSR suggested that gelatin and colloidal silica were both compatible and miscible with S 2 O 8 2- . Meanwhile, the PGSR exhibits a characteristic two-phase increase in viscosity with increased silica sol concentrations, persulfate concentrations, and gelatin concentrations. The PGSR and G-PGSR both could create persistent oxidation degradation of 2,4-dinitrotoluene (2,4-DNT). These results suggested that colloidal silica and gelatin could be used to create PGSR and G-PGSR for persistent oxidation in groundwater remediation. © 2022, The Authors. All rights reserved.

关键词： Aquifers

Seasonal Variation Of Microplastics In Surface Water and Sediment Of The Xiangjiang River: An Inland Urban Drinking Water Source

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SSRN 2023年

作者： Zhao, Wenyu Li, Jing Liu, Mengyue Wang, Rui Zhang, Boxuan Meng, Xiang-Zhou Zhang, ShengWei School of Hydraulic and Environmental Engineering Changsha University of Science & Technology Changsha410114 China Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province School of Hydraulic and Environmental Engineering Changsha University of Science and Technology Changsha410004 China State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing100875 China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

While the Xiangjiang (XJ) River acts as an inland drinking water source, it may experience microplastics emissions originating from Changsha (CS) City. The aim of this study was to characterize the occurrence and distribution of microplastics in the XJ River during both the flooding and dry periods. Samples of surface river water and sediment of the XJ River in CS City were collected in August and December, 2020 and analyzed for composition of microplastics. The results showed ubiquitous presence of microplastics in surface water and sediment of the XJ River at abundances of 0.72–18.6 (7.32 ± 2.36) items L−1 and 26.3–302 (150 ± 75.6) items kg−1 dry weight (dw), respectively, during the flooding period, lower than those of 2.88–17.7 (11.0 ± 3.08) items L−1 and 27.0–651 (249 ± 182) items kg−1 dw during the dry period. Higher microplastic abundance was found mainly in urban centers as well as downstream of wastewater treatment plants, implying anthropogenic activities to be a source of microplastics. The high variances in the shapes, color, and types of microplastics in surface waters and sediments implied the action of specific enrichment processes and long-term sources of microplastics pollution. Most (60%) of microplastics particles in both the river water and sediment were in the size range of 50–100 μm. Fourier transform infrared (FTIR) spectroscopy and Scanning Electron Microscopy (SEM) indicated that microplastics were subjected to weathering in the environment, contributing to the production of oxygen-containing functional groups and surface cleavage features. Energy Dispersive Spectroscopy (EDS) showed that microplastics bonded to multiple heavy metals, emphasizing the complex nature of microplastics pollution. The results indicate concerning levels of microplastics in the XJ River, despite its status as a high-quality water source. © 2023, The Authors. All rights reserved.

关键词： Sediments