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目的了解消防训练场附近水成膜泡沫灭火剂(AFFF)所致的全氟辛烷磺酸盐(PFOS)和全氟辛酸及其盐(PFOA)的土壤环境风险。方法通过高效液相-串联质谱法(HPLC-MS/MS)检测太原市某消防训练场附近土壤中PFOS、PFOA含量,并运用健康风险模型就该区域土壤中PFOS和PFOA对附近居民的致癌和非致癌风险进行评估。结果训练场附近河流下游土壤中PFOS和PFOA的含量范围分别为127.2～510.5 ng/g和100.3～417.9 ng/g,其对附近居民的综合致癌累积风险值为7.70×10-6,超过了可接受风险水平。结论排入环境中的消防泡沫残液可引起附近土壤中“C8类”氟碳表面活性剂如PFOS和PFOA的含量增加并不断蓄积,造成PFOS和PFOA对附近居民的健康损害风险。
Objective To understand the soil environmental risks of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) and its salts (PFOA) caused by water-filming foam extinguishing agent (AFFF) near the firefighting training ground. Methods The content of PFOS and PFOA in soils near a fire-fighting training ground in Taiyuan was detected by HPLC-MS / MS. The health risk model was used to analyze the effects of PFOS and PFOA on the carcinogenicity Non-carcinogenic risk assessment. Results The contents of PFOS and PFOA in the soil near the training ground ranged from 127.2 to 510.5 ng / g and from 100.3 to 417.9 ng / g, respectively. The cumulative carcinogenic risk to nearby residents was 7.70 × 10-6, Accept the risk level. CONCLUSIONS Residual foam from firefighting effluents into the environment may cause increased levels of “C8” fluorocarbon surfactants such as PFOS and PFOA accumulating in nearby soils, resulting in a risk of health damage to nearby residents caused by PFOS and PFOA.