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四川绵竹—阿坝剖面土壤中多环芳烃含量和来源及其生态风险

, PP. 79-83

Keywords: 多环芳烃(PAHs),土壤,含量,来源,生态毒性风险,四川绵竹阿坝

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Abstract:

利用气相色谱与质谱联用仪(GCMS)对四川绵竹—阿坝剖面土壤中16种优控多环芳烃(PAHs)的含量及其来源进行了研究,并分析了土壤中PAHs的生态毒性风险。结果表明研究区冬季和夏季土壤中∑16PAHs的含量变化范围分别为32.78~1131.57ng/g和64.5~461.29ng/g,整体表现为冬季含量高于夏季,且与高程不存在相关性;冬季和夏季土壤中PAHs均主要来源于木材、煤的燃烧,部分采样点受石油燃烧污染;将土壤中多环芳烃苯并\[a\]芘的毒性当量(Bapeq)与荷兰目标值(32.96ng/g)进行比较,结果显示夏季PAHs基本无潜在生态毒性风险,而冬季高度脆弱地区存在一定的潜在生态毒性风险。

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