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source,migration,distribution,toxicological effects and remediation technologies of arsenic in groundwater in China

China Geology 2023年第3期6卷 476-493页

作者： Zhen Wang Hua-ming Guo Hai-yan Liu Wei-min Zhang MOE Key Laboratory of Groundwater Circulation and Environmental Evolution China University of Geosciences(Beijing)Beijing 100083China School of Water Resources and Environment Engineering East China University of TechnologyNanchang 330032China School of Water Resources and Environment China University of Geosciences(Beijing)Beijing 100083China

Groundwater with high arsenic(As) content seriously threatens human life and health. Drinking high-As groundwater for a long time will lead to various pathological changes such as skin cancer, liver cancer,and kidney cancer. High-As groundwater has become one of the most serious environmental geological problems in China and even internationally. This paper aims to systematically summarize the sources,migration, distribution, toxicological effects, and treatment techniques of As in natural groundwater in China based on a large number of literature surveys. High-As groundwater in China is mainly distributed in the inland basins in arid and semi-arid environments and the alluvial and lacustrine aquifers in river deltas in humid environments, which are in neutral to weakly alkaline and strongly reducing *** content of As in groundwater varies widely, and As(Ⅲ) is the main form. The main mechanism of the formation of high-As groundwater in China is the reduced dissolution of Fe and Mn oxides under the action of organic matter and primary microorganisms, alkaline environment, intense evaporation and concentration, long-term water-rock interaction, and slow groundwater velocity, which promote the continuous migration and enrichment of As in groundwater. There are obvious differences in the toxicity of different forms of As. The toxic of As(Ⅲ) is far more than As(V), which is considered to be more toxic than methyl arsenate(MMA) and dimethyl arsenate(DMA). Inorganic As entering the body is metabolized through a combination of methylation(detoxification) and reduction(activation) and catalyzed by a series of methyltransferases and reductases. At present, remediation methods for high-As groundwater mainly include ion exchange technology, membrane filtration technology, biological treatment technology, nanocomposite adsorption technology, electrochemical technology, and so on. All the above remediation methods still have certain limitations, and it is urgent to d

关键词： High arsenic groundwater source and distribution Enrichment mechanism Skin cancer Liver cancer Kidney cancer Toxicological effect Remediation technology Ecological geological survey engineering Hydrogeological survey engineering

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distribution and characterizing sources of polycyclic aromatic hydrocarbons of surface water from Jialing River

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Journal of Central South University 2012年第3期19卷 850-854页

作者：许晓毅蒋真玉王继行朱虹豆俊峰 H.D.Narres D.Hofmann E.Klumpp Key Laboratory of The Three Gorges Reservoir Region's Eco-Environment of Ministry of Education Chongqing University College of Water Sciences Beijing Normal University Forschungszentrum Jülich GmbH

Sixteen priority polycyclic aromatic hydrocarbons(PAHs) in surface water samples were analyzed by gas chromatograph-mass spectrometer(GC-MS) to study their distribution and characterizing *** water samples were collected from five sites(J1-J5) in the Jialing River of Chongqing downtown area from September 2009 to August *** results demonstrate that the concentration of total PAHs in three samples upstream are relatively higher than those in other two sites downstream,with average concentration of total PAHs for each site ranging from 811.5 ng/L to 1585.8 ng/*** 2,3 and 4-ring PAHs for sampling stations account for 13.0%,56.6% and 28.6%,respectively,in total *** are obvious tendencies of seasonal change for PAHs concentration in surface *** PAHs concentration in April of wet season is 1 301.6 ng/L,which is 1.3 times the lowest amount of total PAHs in August of flood *** of specific PAH compounds were used to characterize the possible pollution *** results indicate that the PAHs in surface water samples are primarily from pyrolytic PAHs because of factories along these sites,while the direct leakage of petroleum products may be significant for two sites,Jiahua Bridge(J4) and Huanghuayuan Bridge(J5),because of the wharf boat nearby.

关键词： polycyclic aromatic hydrocarbons source and distribution surface water Jialing River

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