International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Heilongjiang Provincial Key Laboratory of Polar Environment and Ecosystem (HPKL-PEE), Harbin Institute of Technology, Harbin 150090, China.
International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Heilongjiang Provincial Key Laboratory of Polar Environment and Ecosystem (HPKL-PEE), Harbin Institute of Technology, Harbin 150090, China.
J Hazard Mater. 2023 Feb 5;443(Pt B):130285. doi: 10.1016/j.jhazmat.2022.130285. Epub 2022 Oct 29.
Along with the restriction and prohibition of historic used organochlorine pesticides (OCPs), current used pesticides (CUPs) were widely used as alternatives. In order to investigate the pollution characteristics of pesticides, the levels and spatial distributions of OCPs and CUPs in 154 surface soil across China were comprehensively compared. Totally, 107 target pesticides were screened, and 20 OCPs and 34 CUPs were detected. The numbers of co-occurred pesticides in single soil sample were from 17 to 36 indicating the diversity and complexity of pesticides pollution. The concentrations of OCPs in urban soils were higher than rural soils, while rural > urban for CUPs. Furthermore, obviously different spatial distribution patterns were found for OCPs and CUPs. For OCPs, the secondary distribution pattern was dominant. For CUPs, the primary distribution pattern was obviously observed due to their current extensive usage. In addition, higher concentrations of both CUPs and OCPs were accumulated in the Northeast China Plain due to long-range atmospheric transport and deposition. Along with the old topic of OCPs, the study pointed out the preliminary understanding of CUPs pollution characteristic in surface soil of China, which provided a new story with the deep understanding of their environmental fate in both China and the world.
随着历史上使用的有机氯农药（OCPs）的限制和禁止，目前使用的农药（CUPs）被广泛用作替代品。为了调查农药的污染特征，本研究综合比较了中国 154 个表层土壤中 OCPs 和 CUPs 的水平和空间分布。总共筛选了 107 种目标农药，检测到 20 种 OCPs 和 34 种 CUPs。单一样本土壤中共同存在的农药数量从 17 种到 36 种，表明了农药污染的多样性和复杂性。城市土壤中 OCPs 的浓度高于农村土壤，而 CUPs 的浓度则相反，农村高于城市。此外，还发现 OCPs 和 CUPs 具有明显不同的空间分布模式。对于 OCPs，二次分布模式占主导地位。对于 CUPs，由于其目前的广泛使用，明显观察到了一次分布模式。此外，由于长距离大气传输和沉积，东北平原积累了更高浓度的 CUPs 和 OCPs。除了 OCPs 的老话题外，本研究还初步了解了中国表层土壤中 CUPs 的污染特征，为深入了解它们在中国乃至全球的环境命运提供了一个新的视角。
