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  

Contents,Sources and Ecological Risks of Polycyclic Aromatic Hydrocarbons in Mianzhu-A'ba Soil Profile,Sichuan,China

作　　者：柯艳萍[1,2] 祁士华[1,2] 陈静[1,2] 许峰[1,2] 邢新丽[1,2] 张小辉[1,2] 

机构地区：[1]中国地质大学环境学院,武汉430074 [2]中国地质大学生物地质与环境地质国家重点实验室,武汉430074

出　　处：《安全与环境工程》2013年第4期79-83,共5页Safety and Environmental Engineering

基　　金：教育部高等学校博士学科点专项科研基金项目(20090145110004);生物地质环境地质教育部重点实验室开放基金项目(BGEG1012)

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。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 Aba 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 BaPoq =32.96 ng/g）,the total gaPeq 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.

关 键 词：多环芳烃(PAHs) 土壤 含量 来源 生态毒性风险 四川绵竹-阿坝 

分 类 号：X825[环境科学与工程—环境工程]