Soil-crop Distribution and Health Risk Assessment of Organochlorine Pesticides on Typical Agricultural Land in Southern Leizhou Peninsula

被引：1
|
作者：
Liang X.-H. [1 ,2 ]
Xie Q.-L. [1 ,2 ]
Zheng Q. [1 ,2 ]
Yang B.-C. [1 ,2 ]
Ye J.-M. [1 ,2 ]
Tang C.-J. [1 ,2 ]
机构：
[1] College of Natural Resources and Environment, South China Agricultural University, Guangzhou
[2] Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, Guangzhou
来源：
Huanjing Kexue/Environmental Science | 2022年 / 43卷 / 01期
关键词：
Agricultural land; Bioaccumulation; Crop; Human health risk; Organochlorine pesticide(OCPs); Soils;
D O I：
10.13227/j.hjkx.202104271
中图分类号：
学科分类号：
摘要：
The residual content of organochlorine pesticides (OCPs) in soil and crops of typical agricultural land in the southern Leizhou peninsula were determined using gas chromatography-mass spectrometry (GC-MS). Additionally, the bioconcentration factors of organochlorine pesticides in eight crops were investigated, and the human health risk was evaluated. The results indicated that 10 types of OCPs were detected to varying degrees; HCHs and heptachlor were the main OCPs in the study area, with the residual contents of 23.83-111.51 ng•g-1 and 11.01-25.97 ng•g-1 in soil and 7.54-61.28 ng•g-1 and 3.96-30.97 ng•g-1 in crops, respectively. A small number of soil and crop samples were found to exceed the standard. The ratio of α-HCH/γ-HCH was less than 1 in 87.50% of the soil samples, and β-HCH/α-HCH was larger than 1. This indicates that the HCHs were probably derived from the recent use of lindane and historical residual pollution, whereas the heptachlor was mainly derived from underground insect pests and the application of termite control agents. The enrichment ability of OCPs was significantly different among different crops. The bioaccumulation capacity of vegetables was higher than that of fruit. Furthermore, bulb vegetables (leeks) were significantly stronger than other vegetables. A human health risk assessment of OCPs showed that OCP-combined pollution would not cause significant health risks to the population in the study area. However, the maximum value of HI in some crop samples was greater than 1, indicating that there were still potential risks, which should not be ignored. © 2022, Science Press. All right reserved.
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页码：500 / 509
页数：9
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