Guo Jipu, Chen Wenwu, Wu Menglei, Qu Chengkai, Sun Haotian, Guo Jiahua
State Grid Shaanxi Electric Power Research Institute, Xi'an 710100, China.
Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an 710100, China.
Toxics. 2023 May 31;11(6):496. doi: 10.3390/toxics11060496.
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, with an average concentration of 7.23 ng L. 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.
在过去三十年里，黄土高原一直是公众讨论和环境关注的焦点。在本研究中，为了调查北洛河水体中有机氯农药（OCP）污染的影响，检测了该水体17个点位的25种OCPs浓度。结果表明，水体中∑OCPs浓度范围为1.76至32.57 ng/L，平均浓度为7.23 ng/L。与国内外其他流域相比，北洛河中的OCP含量处于中等水平。北洛河中的六氯环己烷（HCH）污染主要来自林丹和工业用六氯环己烷的混合输入。滴滴涕（DDT）污染主要来自工业用滴滴涕和三氯杀螨醇的混合输入。大部分OCP污染来自历史残留。风险评估结果表明，六氯苯（HCB）和硫丹在北洛河中下游具有较高的生态风险。大多数残留的OCPs对人类不足以构成致癌和非致癌健康风险。本研究结果可为OCP防控及流域环境管理提供参考。
