State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430078, China.
Institute of Geological Survey, China University of Geosciences, Wuhan, 430074, China.
Ecotoxicol Environ Saf. 2020 Jun 15;196:110542. doi: 10.1016/j.ecoenv.2020.110542. Epub 2020 Apr 7.
Historical residual of persistent organic pollutants (POPs) in flood sediment from a karst cave were investigated. Fifteen vertical sediment samples were collected from a 6 m-deep flood sediment profile in the Longwang Cave, and the concentrations of organochlorine pesticides (OCPs), polycyclic aromatic hydrocarbons (PAHs) and particle size distribution in the sediments were analysed. The concentrations of OCPs and PAHs varied from 0.85 ng g to 63.1 ng g (mean 8.11 ng g) and 5.05 ng g to 82.6 ng g (mean 13.9 ng g), respectively; major PAHs in the profile were 2- and 3-ringed PAHs and a few were 5- or 6- ringed PAHs, which indicated less influence from industry but a high impact from the local combustion of coal and biomass; HCHs and DDTs in the profile were historically residual in this region, and HCHs mainly originated from the application of Lindane, while DDTs originated from the application of dicofol and technical DDTs; no significant correlation between the concentrations of OCPs and PAHs and the sedimental particle size in the sediments was found.
研究了岩溶洞穴洪水沉积物中持久性有机污染物（POPs）的历史残留。从龙王洞 6 米深的洪水沉积物剖面中采集了 15 个垂直沉积物样本，并分析了沉积物中的有机氯农药（OCPs）、多环芳烃（PAHs）和粒径分布。OCPs 和 PAHs 的浓度范围分别为 0.85ng/g 至 63.1ng/g（平均值为 8.11ng/g）和 5.05ng/g 至 82.6ng/g（平均值为 13.9ng/g）；剖面中的主要 PAHs 为 2 环和 3 环 PAHs，少数为 5 环或 6 环 PAHs，这表明该地区受工业影响较小，但受当地煤炭和生物质燃烧影响较大；剖面中的 HCHs 和 DDTs 是该地区历史残留的，HCHs 主要来源于林丹的使用，而 DDTs 则来源于三氯杀螨醇和技术 DDTs 的使用；OCPs 和 PAHs 浓度与沉积物中泥沙粒径之间无显著相关性。
