我国华东某县饮用水源地多氯联苯的检测与风险评价

为研究我国农村饮用水源地中内分泌干扰物——多氯联苯对人体健康的影响,对华东某县的深层井水、浅层井水、地表沟塘水进行布点采样,采用SPE与GC-MS联用,定性定量分析水样中多氯联苯. 结果表明:华东某县多氯联苯同系物中仅有五氯联苯检出,检出率为100%；在深层井水、浅层井水和地表沟塘水中ρ(五氯联苯)分别为0.51～82.99,0.51～44.16和1.78～34.36 ng/L,枯水期平均值高于丰水期；枯水期ρ(五氯联苯)最大,超标3.15倍；丰水期超标倍数最大的样品为地表沟塘水,ρ(五氯联苯)超标1.28倍, 深层井水未超标. 健康风险评估结果，华东某县饮用水源地中的五氯联苯致癌及非致癌风险均在可接受风险范围内,五氯联苯的风险平均值为地表沟塘水>浅层井水>深层井水,枯水期健康风险高于丰水期. 

Detection and Risk Assessment of PCBs from a Potable Water Source in a County in Eastern China

To study the influence of endocrine disrupter polychlorinated biphenyls(PCBs) in a drinking water source in a rural area of China on human health,water samples were collected separately from deep wells,shallow wells,and surface ditches in a county in the Eastern China.The PCBs of the water samples were analyzed by using SPE and GC-MS combination.The results showed that only pentachlorobiphenyl was detected among the PCB homologs in the studied drinking water source.The detectable rate was 100%.The mass conc...