Author:
Yao Siyu,Huang Jiahui,Zhou Haijun,Cao Cuiting,Ai Tao,Xing Huanhuan,Sun Jianteng
Abstract
To reveal the pollution status of agricultural soils along with rapid urbanization and economic growth, a large regional survey of organochlorine pesticides (OCPs) in agricultural soils was conducted in the Pearl River Delta (PRD) of China. The results showed that the total residues of 23 OCPs were in the range of ND-946 ng/g dry weight. OCP residues showed distinct spatial distribution characteristics within the PRD. OCPs were mainly found in areas with high agricultural production and industrial activities. Higher OCP concentrations were observed in the top layer of soil, while the concentration decreases to marginal levels when the soil depth is greater than 50 cm. OCPs are mainly derived from historical use. Hexachlorocyclohexanes (HCHs) in the top soil of the study area are mainly from the use of lindane. Soil pH was negatively and significantly correlated with total OCP concentration. The human health risk assessment showed no health risk for children, while for adults, there is a non-carcinogenic risk, which needs to be noticed. Agricultural activities and industrial production have made the region a pollution hotspot and should arouse more stringent regulation to protect the environment and food safety.
Funder
the National Natural Science Foundations of China
National Key Research and Development Program of China
the Guangdong Basic and Applied Basic Research Foundation
Subject
Health, Toxicology and Mutagenesis,Public Health, Environmental and Occupational Health
Cited by
10 articles.
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