工业区及周边农业区土壤中二噁英污染水平及暴露风险  

Pollution Levels and Risk Assessment of Dioxin in the Soils of Industrial Park and Farm Region near Industrial Park

作　　者：徐小静[1] 赵金平[1] 钟英立[1] 

机构地区：[1]广东省环境监测中心实验室,广东广州510308

出　　处：《广东化工》2017年第13期211-212,207,共3页Guangdong Chemical Industry

基　　金：广东省省级科技计划项目(2016A040403069)

摘　　要：选取复合产业工业区及周边农业区土壤进行研究,重点研究了土壤中二噁英的污染水平及土壤摄食暴露风险。通过对14个采样点(包括1个背景点)的研究发现,工业区ΣPCDD/Fs的质量浓度为:1.00×10~3~1.87×10~4 ng/kg,毒性当量为:I-TEQ 3.32~22.9 ng/kg;农业区果园地ΣPCDD/Fs的质量浓度为:117~795 ng/kg,毒性当量为:I-TEQ 0.479~1.11 ng/kg;农业区菜地ΣPCDD/Fs的质量浓度为:717~1.48×10~3 ng/kg,毒性当量为:I-TEQ 1.35~1.76 ng/kg。背景点土壤中二噁英浓度相对较低,质量浓度值为:132 ng/kg,毒性当量为:0.331 ng/kg。对工业区及周边农业区土壤二噁英土壤摄食暴露风险研究结果表明,儿童土壤摄食暴露风险要高于成年人;同时无论是儿童还是成年人,其二噁英的土壤摄食暴露量都比较低。The soils of complex industrial park and farm region near industrial park have been selected to study. A short-term sampling scheme was devised to determine the pollution levels of polychlorinated dibenzo-p-dioxinsand dibenzofurans （PCDD/Fs） in the soil and to evaluate the impact of PCDD/Fs on the lives of the inhabitants in the industrial park and farm region. Samples were collected from 14 different sites （including one background）, and the results indicated that the PCDD/Fs concentrations （toxic equivalent quantity （TEQ）） for industrial park were 1.00×10^-1.87×10^4 ng·kg^-1 （3.32-22.9 ng I-TEQ·kg^-1）, the PCDD/Fs concentrations （toxic equivalent quantity （TEQ）） for orchard were 117-795 ng·kg^-1 （0.479-1.11 ng I-TEQ·kg^-1）, the PCDD/Fs concentrations （toxic equivalent quantity （TEQ）） for vegetable field were 717-1.48×10^3 ng·kg^-1 （1.35-1.76 ng I-TEQ·kg^-1）, respectively, which were higher than the concentration of PCDD/Fs（I.35-1.76 ng·kg^-1） for the background, and the TEQ in the latter sampling site only has 0.331 ng I-TEQ·kg^-1. Results of daily intake of PCDD/Fs by soil ingestion suggested that the soil ingestion exposure of PCDD/Fs by the inhabitants for children is higher than adults. At the same time, the results for children and adults were lower.

关 键 词：二噁英 土壤 暴露风险 

分 类 号：X513[环境科学与工程—环境工程]