Shengpin Li , Jiaqing Liu , Fei Liu , Wenpeng Li , Kun Liu , Haitao Piao , Rui An , Yiwei Zhang , Tuoya Tai , Qianying Zhu , Fuyang Huang
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引用次数: 0
Abstract
Pesticides are widely used in agricultural production, and their residues migrate to aquifers, threatening groundwater safety. This study investigated the occurrence and distribution characteristics of 18 typical pesticide components in different environmental media in China. Meanwhile, the driving factors of the migration and transformation of pesticide components in groundwater were identified. The results show that among 20,010 groundwater monitoring sites, the proportions of the average concentrations of the 18 pesticide components at not detected (ND), ND-1 μg/L, 0.1–1 μg/L, and greater than 1 μg/L are 40.42 %, 25.85 %, 26.59 %, and 7.14 %, respectively. Among 15 groundwater resource regions, the proportions of groundwater with average pesticide concentrations greater than 1 μg/L in the Liaohe River Basin, Songhua River Basin, and Huaihe River Basin are 22.92 %, 16.62 %, and 10.92 % respectively. The detected concentration of pesticides in groundwater decreases significantly with increasing monitoring depth. Based on the multi-factor analysis of the source-sink processes of pesticides in groundwater, pesticides tend to accumulate in phreatic aquifers with relatively more rainfall, shorter sunshine duration, higher permeability of the vadose zone, a primarily reducing environment, and TDS less than 1000 mg/L. In some monitoring sites with phreatic aquifers, pesticide components of chlorpyrifos, pentachlorophenol, 1,2,3,4,5,6-hexachlorocyclohexane, lindane, hexachlorobenzene, heptachlor and malathion pose non-carcinogenic and carcinogenic risks to human health.
期刊介绍:
The Journal of Contaminant Hydrology is an international journal publishing scientific articles pertaining to the contamination of subsurface water resources. Emphasis is placed on investigations of the physical, chemical, and biological processes influencing the behavior and fate of organic and inorganic contaminants in the unsaturated (vadose) and saturated (groundwater) zones, as well as at groundwater-surface water interfaces. The ecological impacts of contaminants transported both from and to aquifers are of interest. Articles on contamination of surface water only, without a link to groundwater, are out of the scope. Broad latitude is allowed in identifying contaminants of interest, and include legacy and emerging pollutants, nutrients, nanoparticles, pathogenic microorganisms (e.g., bacteria, viruses, protozoa), microplastics, and various constituents associated with energy production (e.g., methane, carbon dioxide, hydrogen sulfide).
The journal''s scope embraces a wide range of topics including: experimental investigations of contaminant sorption, diffusion, transformation, volatilization and transport in the surface and subsurface; characterization of soil and aquifer properties only as they influence contaminant behavior; development and testing of mathematical models of contaminant behaviour; innovative techniques for restoration of contaminated sites; development of new tools or techniques for monitoring the extent of soil and groundwater contamination; transformation of contaminants in the hyporheic zone; effects of contaminants traversing the hyporheic zone on surface water and groundwater ecosystems; subsurface carbon sequestration and/or turnover; and migration of fluids associated with energy production into groundwater.