【摘要】 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∑16PAHs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(Bapeq)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。更多还原

【Abstract】 The contents,sources and ecological risks of 16 kinds of polycyclic aromatic hydrocarbons(PAHs),which are on the list of USEPA priority,in soils from Mianzhu to A’ba profile are analyzed by using GC-MS.The results show that the contents of PAHs in winter and summer are in the ranges of 32.78~1131.57 ng/g and 64.5~461.29 ng/g dry weight,respectively.On the whole,the contents of PAHs in winter are higher than those in summer,and there is no correlation between PAHs contents and altitudes.Wood and coal combustion are the main sources of PAHs,and some sampling sites are polluted by the combustion of petroleum.Compared with the Dutch target value(total BaPeq=32.96 ng/g),the total BaPeq values of sampling soils indicate that there are no potential ecological risks in summer and there are some potential ecological risks in some high vulnerable areas in winter.更多还原