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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。
In a county of Huai’an, 8 villages in 4 towns were selected for distribution. Water samples in wet season and dry season were collected in July and December 2010 respectively. Solid-phase extraction and gas chromatography-mass spectrometry (GC-MS) Polycyclic aromatic hydrocarbons (PAHs) in shallow groundwater were tested. The test results show that the total amount of PAHs in deep groundwater during the abundance and dry season are 496.18-1035.06ng / L and 82.60-329.03ng / L, respectively. The total amount of PAHs in shallow groundwater and dry season were 474.69-2310.44ng / L and 81.39-518.81ng / L, respectively. The total amount of PAHs in wet season was higher than that in dry season. Benzo (a) pyrene exceeded the standard in 5 water samples, exceeding the maximum by 0.69 times. By using the optimized USEPA risk assessment model, the human health risk assessment of PAHs is carried out. The carcinogenic risk level of PAHs is between 2 × 10-8 and 3.92 × 10-6, and the risk of cancer of some water samples exceeds the monitoring value of water quality of 10-6.