中国岩溶2013，Vol.32Issue(1)：79-87,9.
表层岩溶带土壤中多环芳烃分布特征及来源解析
Distributing features and source analysis of polycyclic aromatic hydrocarbons in epikarst soils
摘要
Abstract
The concentration of 16 prior polycyclic aromatic hydrocarbons(FAHs) are measured by gas chro-matography equipped with a mass spectrometry detector for samples collected from the overlaying soils of four typical epikarst springs that located in Nanchuan District, Chongqing City. The distribution, possible sources and contaminated level of the 16 PAHs are investigated. The detection ratios of the 16 PAHs are 100 % in all of the soil samples. The total concentration of the 16 PAHs in the soils range from 439. 19 to 3 329. 72 ng/gwith the mean value being 1 392. 44 ng/g. The PAH constituents are affected by altitude. With the increase of altitude, the percent of low molecular weight PAHs increase, but the percent of high molecular weight PAHs decrease. The isomer ratios reveal that PAHs in soils mainly come from the combustion of coal, biomass and petroleum. The TEQcare of the 16 PAHs range from 18. 65 to 501. 13 ng/g, the mean value is 140. 57 ng/g, and 96. 8 % of which is contributed by 7 carcinogenic PAHs. Among the soils of the four epikarst spring, the level of PAHs contamination in HG epikarst spring soils is highest, and the contamination level of SF epikarst spring soils are lowest, but in BSW soils, the effect of pine needle litter fall should be taken into account.关键词
表层岩溶泉/土壤/多环芳烃/来源Key words
epikarst spring/ soil/ polycyclic aromatic hydrocarbons/ sources分类
资源环境引用本文复制引用
孙玉川,沈立成,袁道先..表层岩溶带土壤中多环芳烃分布特征及来源解析[J].中国岩溶,2013,32(1):79-87,9.基金项目
重庆市科委院士专项(CSTS,2010BC7004)、国家自然科学基金项目(41072192)、西南大学博士基金项目(SWU110258) （CSTS,2010BC7004）
