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. 2023 May 31;11(6):496.
doi: 10.3390/toxics11060496.

Distribution, Sources, and Risk Assessment of Organochlorine Pesticides in Water from Beiluo River, Loess Plateau, China

Jipu Guo  1 , Wenwu Chen  2 , Menglei Wu  3 , Chengkai Qu  4 , Haotian Sun  2 , Jiahua Guo  2
Affiliations

Distribution, Sources, and Risk Assessment of Organochlorine Pesticides in Water from Beiluo River, Loess Plateau, China

Jipu Guo et al. Toxics. .

Abstract

The Loess Plateau has been a focus of public discussion and environmental concerns over the past three decades. In this study, in order to investigate the effect of OCP pollution in water of the Beiluo River, concentrations of 25 OCPs at 17 locations in the water were examined. The results showed that the concentration of ∑OCPs in the water ranged from 1.76 to 32.57 ng L-1, with an average concentration of 7.23 ng L-1. Compared with other basins in China and abroad, the OCP content in the Beiluo River was at a medium level. Hexachlorocyclohexane (HCH) pollution in the Beiluo River was mainly from the mixed input of lindane and technical HCHs. Dichlorodiphenyltrichloroethane (DDT) pollution was mainly from the mixed input of technical DDTs and dicofol. Most of the OCP pollution came from historical residues. The risk assessment results showed that hexachlorobenzene (HCB) and endosulfan had high ecological risks in the middle and lower reaches of the Beiluo River. Most residual OCPs were not sufficient to pose carcinogenic and non-carcinogenic health risks to humans. The results of this study can provide a reference for OCP prevention and control and watershed environmental management.

Keywords: Beiluo River; distribution; organochlorine pesticides; risk assessment; sources.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Sampling map of water in the Beiluo River.
Figure 2
Figure 2
Distribution of OCPs in water of the Beiluo River.
Figure 3
Figure 3
Distribution of HCHs (a), DDTs (b,c), and SULPHs (d) sources in water of the Beiluo River.
Figure 4
Figure 4
The ecological risk of OCPs in water of the Beiluo River.
Figure 5
Figure 5
The carcinogenic risk (a) and non−carcinogenic risk (b) of OCPs in water of the Beiluo Basin.
See this image and copyright information in PMC

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