太原市农田土壤中多氯联苯污染特征及健康风险
Residues Characters and Health Risk Assessment of PCBs in Agricultural Soils of Taiyuan City
张婧雯 1张红 1刘勇 2李深泉3
作者信息
- 1. 山西大学环境与资源学院,山西太原 030006
- 2. 山西大学黄土高原研究所,山西太原030006
- 3. 明尼苏达大学德鲁斯分校环境科学学院,美国德鲁斯 MN558121
- 折叠
摘要
[目的]研究多氯联苯(PCBs)在太原市农田土壤中的分布特征、来源以及对周围人群的健康风险.[方法]以太原市农田土壤为研究对象,分析测定土壤中7种指示性PCBs的含量,并根据太原市人群实际情况的暴露参数和USEPA的部分参数,对太原市农田土壤中PCBs的健康风险进行评价.[结果]太原市农田土壤中7种指示性PCBs的平均值为87.29μg/kg,以六氯及以上的高氯联苯为主;与国内外其他城市土壤中PCBs的残留量相比较,太原市农田土壤中PCBs残留量处于相对较高水平;且35%采样点的∑7PCBs残留量高于农业用地限定值;主成分分析结果表明,土壤中PCBs污染可能主要与大型企业电子电力设备绝缘材料、电容器浸渍剂和变压器的泄漏,以及含有Aroclor1254绝缘材料、油漆添加剂和化产车间使用Aroclor1260一类的工业产品有关;太原市农田土壤中的PCBs在敏感用地和非敏感用地方式下均不会对成人和儿童产生非致癌健康风险;在2种不同用地方式下太原市农田土壤中PCBs对成人的综合致癌风险较小,但对儿童会存在一定的致癌风险,3种暴露途径对健康风险贡献率依次为经口摄入>皮肤接触>呼吸吸入.[结论]该研究可为太原市土壤污染残留分布分析及其评价提供参考.
Abstract
[Objective]To study the distribution and source of PCBs in Taiyuan's agricultural soil and the health risks posed to the people near-by. [Method] Farm land soil in Taiyuan was selected as the research objective to measure the content of 7 indicative PCBs in the soil. Based on the Taiyuan residents' exposure parameter and some parameters of USEPA,the health risks caused by PCBs were analyzed in Taiyuan' s farmland soil. [Result]The average value of 7 indicative PCBs in Taiyuan's agricultural soil was 87. 29 μg/kg,majorly consisting of high-chlorinated bi-phenyls with hexachlor or above;Compared to the PCBs study in other regions,the PCBs residue level in Taiyuan' s agricultural soil remained rel-atively high and the residue volume of∑7PCBs at 35% sampling sites appeared to be higher than the limit of agricultural land;The analysis out-put of the major content revealed that the pollution of PCBs in the soil might be mainly caused by the leakage of insulation materials from large e-lectronic enterprises and the impregnate and transformer of capacitor,as well as the paint additive containing Aroclor1254,insulation materials and other industrial products containing Aroclor1260 used in the chemical production plants;The amount of PCBs accumulated in Taiyuan' s agricul-tural soil would not bring any non-carcinogenic health risks to adults or children no matter in sensitive land use or insensitive land use. Consider-ing the utilization in both these two types of land,the amount of PCBs in Taiyuan' s agricultural soil only indicated a minor comprehensive carci-nogenic risk to adult,while the risk might increase a little when it comes to children. The contribution of three ways of exposure to the health risks turned out to be:oral intake>skin contact>respiratory inhalation. [ Conclusion] The research can give reference for studying pollution residue distribution and assessment.
关键词
多氯联苯/农田土壤/来源/健康风险评价/太原市Key words
PCBs/Agricultural soils/Source/Health risk assessment/Taiyuan City引用本文复制引用
出版年
2017
国家科技期刊平台
NSTL
维普
万方数据