【摘要】 在淮安某县选取4个镇中的8个村进行布点,分别在2010年7月和12月采集丰水期和枯水期水样,采用固相萃取与气相色谱-质谱联用方法对深层地下水、浅层地下水中的多环芳烃(PAHs)进行检测。检测结果表明,深层地下水在丰、枯水期PAHs总量分别为496.18—1035.06ng/L和82.60—329.03ng/L。浅层地下水丰、枯水期PAHs总量分别为474.69—2310.44ng/L和81.39—518.81ng/L。丰水期PAHs总量高于枯水期。5个水样中苯并(a)芘超标,最大超标0.69倍。采用优化的USEPA风险评价模型,对PAHs进行人体健康风险评价,其致癌风险水平在2×10-8—3.92×10-6之间,部分水样致癌风险超过10-6的水质监控值。更多还原

【Abstract】 Thirty four water samples from eight villages of 4 towns in a county of Huainan were collected in July(high flow period) and December in 2010(low flow period).The water samples from deep underground water and shallow groundwater were analyzed for 16 PAHs by solid phase extraction(SPE) coupled with GC-MS.Concentrations of total PAHs in deep underground water during high and low flow period were respectively ng/L 496.18ng/L to 1035.06ng/L and from 82.60ng/L to 329.03ng/L.Concentrations of total PAHs in shallow groundwater during high and low flow period were respectively from 474.69ng/L to 2310.44ng/L and from 81.39ng/L to 518.81ng/L.Concentrations of total PAHs in high flow period were higher than in low flow period.Benzo(a)pyrene concentrations in five samples exceeded the standard level,and the maximal concentration of benzo(a)pyrene was 0.69 times higher than the standard level.The human body health risk of PAHs was assessed by the optimal USEPA assessment model,and the risk level was in the range of 2×10-8— 3.92×10-6,and the carcinogenic risk of some water samples exceeded the recommended risk index(10-6).更多还原