摘要
以石羊河流域武威平原区集中式饮用水源保护区土壤为研究对象采用现场采样及室内测试的方法对其有机氯农药六六六(HCHS)和滴滴涕(DDTs)的残留水平、组成特征进行研究探讨污染物的潜在来源和生态风险。结果表明,该区域DDTs未检出,72.7%的样品检测出不同浓度水平的HCHs(0.134~0.616μg·kg^(-1)),平均为0.323±0.16μg·kg^(-1);所有样品的HCHS和DDTs均远低于国家土壤环境质量一级标准限值(50μg·kg^(-1)),污染程度很低,生态风险小。HCHs的4种异构体中,β-HCH和γ-HCH的检出率分别为27.3%和72.7%,平均浓度分别为0.326±0.107μg·kg^(-1)和0.201±0.089μg·kg^(-1),α-HCH和δ-HCH均未检出。该区域HCHs与土壤有机质之间几乎没有相关性,HCHs主要来源于大气的干湿沉降或传输。
To discussion the potential sources and ecological risk of contaminants,the residue and composition characteristics of HCHs and DDTs in soils from centralized drinking water sources in the Wuwei Plain area of Shiyang river Basin were analyzed using the method of field investigation and laboratory analyses. The results showed that DDTs were not detected in all samples,but HCHs were detected in 72. 7% of the samples,and the average contents were 0. 323 ± 0. 161μg·kg- 1. All the concentrations of HCHs and DDTs were much less than the first grade value（ 50μg·kg^-1 of environmental quality standard for soils. The pollution degree was much lower,and the ecological risk was small. In 4 isomer of HCHs,the detection rates of β- HCH and γ- HCH were 27. 3% and 72. 7%,the concentrations of β- HCH and γ- HCH were 0. 326 ± 0. 107μg·kg- 1and 0.201 ± 0. 089μg·kg- 1,α- HCH andδ- HCH were not detected. There was no correlation between HCHs and soil organic matter,the main sources of HCHs in soil was atmospheric deposition or transmission.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2016年第4期197-202,共6页
Journal of Arid Land Resources and Environment
基金
甘肃省科技计划项目(1304FKCH102)资助
关键词
水源地土壤
六六六
滴滴涕
残留特征
武威
drinking water sources soil
HCH
DDT
residues characteristics
Wuwei
