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目的了解潍坊市饮用水中多环芳烃的污染状况及健康风险。方法应用全自动固相萃取-气相色谱/质谱联用法对潍坊市103份出厂水及末梢水中16多环芳烃进行检测,应用健康风险评价模型对潍坊市饮用水体中PAHs所致健康风险进行评价。结果潍坊市饮用水中多环芳烃平均值为205.63 ng/L,分布范围为33.05~492.98 ng/L,其中萘、菲浓度较高,二者分别占∑PAHs的22.8%和18.1%;基于Ba P的毒性当量最大的是二苯并(a,h)蒽(Db A),为0.80 ng/L。对于8种致癌性PAHs而言,除茚并(1,2,3-cd)芘(In P)、苯并(g,h,i)芘(Bg P)在所有样品均未检出外,其余6种多环芳烃均有不同程度的检出,但均未超过GB5749-2006《生活饮用水卫生标准》限值。依据美国环保署(EPA)的健康风险评价方法,13个地区采样点水样的多环芳烃致癌风险均在10-7水平,其中临朐县、潍城区、坊子区采样点水样的致癌风险接近10-6的水平,存在潜在的致癌风险。结论潍坊市饮用水中多环芳烃类污染物浓度较低,对人体产生的健康风险总体处于较低水平。
Objective To understand the pollution and health risks of polycyclic aromatic hydrocarbons (PAHs) in drinking water in Weifang City. Methods A total of 103 PAHs in the factory water and the peripheral water of Weifang City were detected by automatic SPE-GC / MS. The health risk assessment model was used to evaluate the health risks of PAHs in drinking water in Weifang City . Results The average PAHs content in drinking water of Weifang City was 205.63 ng / L with a distribution range of 33.05-492.98 ng / L, of which naphthalene and phenanthrene were higher, accounting for 22.8% and 18.1% of ΣPAHs respectively. Based on Ba The most toxic equivalent of P was dibenzo (a, h) anthracene (DbA) at 0.80 ng / L. For all 8 kinds of carcinogenic PAHs, no benzo (g, h, i) pyrene (Bg P) was detected in all the samples except for In (1,2,3-Cd) The remaining six kinds of PAHs were detected to varying degrees, but did not exceed GB5749-2006 “drinking water health standards” limit. According to the EPA’s health risk assessment method, the carcinogenic risk of PAHs in water samples from 13 sampling points in the region is at a level of 10-7, of which the carcinogenic risk of sampling water samples in Linqu County, Weicheng District and Fangzi District Near the 10-6 level, there is a potential carcinogenic risk. Conclusion The concentration of PAHs in drinking water in Weifang City is relatively low, and the overall health risk to human beings is at a low level.