摘要
以山东省济南市为研究区域,采集测定了35个表层土壤样品中16种优先控制PAHs的含量,在此基础上对其组成特征、来源和环境风险进行了分析.结果表明,16种PAHs在所有样品中均具有较高的检出率,部分达到100%.含量范围为55.8—1.24×104μg·kg-1,平均值1.27×103μg·kg-1,中位值263μg·kg-1,低于已报道的我国其他地区表层土壤PAHs的污染水平.各功能区含量高低顺序为工业区、交通繁忙区、商业居民区和农田.PAHs组成分析与因子分析表明,济南市表层土壤中PAHs为混合源,煤、石油等化石燃料不完全燃烧作用占优势.16种PAHs的Bap总毒性当量浓度(TEQBa p)在0.54—1.37×103μg·kg-1之间,7种致癌性PAHs的TEQBap占总TEQBap的98.9%,是环境风险的主要贡献者.农田土壤风险水平较低,工业区土壤风险水平较高,需要管理部门特别注意.
The concentrations of 16 priority polycyclic aromatic hydrocarbons （ PAHs） were analyzed in 35 top？soil samples collected from Jinan City. The distribution, sources and environmental risk of the PAHs for the collected samples were investigated. The analysis results showed that all 16 target PAHs were detected in soil samples. The total concentrations of PAHs ranged from 55. 8 to 1. 24 × 10^4μg·kg^-1 . The average concentration was 1. 27 × 10^3 μg·kg^-1 , which is lower than the average concentration of other soils reported in China. Based on the PAHs composition and factor analysis, it was found that PAHs originated from multiple sources with incomplete combustion of the fuel as the dominating source. The toxic benzo[a]pyrene equivalent （TEQBap） of the 16 PAHs ranged from 0？54 to 1. 37 × 10^3 μg·kg^-1, and 98. 9% of which was contributed by 7 carcinogenic PAHs. In contrast to lower environmental risk of farmland, industrial district should be given special attention due to its higher risk level.
出处
《环境化学》
CAS
CSCD
北大核心
2015年第1期166-171,共6页
Environmental Chemistry
基金
环境化学与生态毒理学国家重点实验室开放基金(KF2011-16)
国家自然科学基金面上项目(41173092)资助
