天津表土中多环芳烃含量的空间分布特征与来源  

SPATIAL DISTRIBUTION AND SOURCES OF PAHs IN TIANJIN'S TOPSOIL

作　　者：段永红[1] 陶澍[1] 王学军[1] 李本纲[1] 徐福留[1] 刘文新[1] 曹军[1] 朱利中[2] 骆永明[3] 

机构地区：[1]地表过程分析与模拟教育部重点实验室北京大学地理科学中心北京大学环境学院,北京100871 [2]浙江大学环境与资源学院,杭州310028 [3]中国科学院南京土壤研究所,南京210008

出　　处：《土壤学报》2005年第6期942-947,共6页Acta Pedologica Sinica

基　　金：国家重点基础研究发展规划项目(2003BC415004);国家自然科学基金项目(40332015;40021101);教育部重点项目资助

摘　　要：采用聚类分析、方差分析和多重比较等统计方法,结合空间分异分析研究了天津表土中多环芳烃(PAHs)含量的多元和空间分布特征。结果表明,可根据样点PAHs含量和空间分布特征将天津地区划分为三个含量有显著差异且连续分布的区域,即南北低值区、市中心近郊次高值区和塘沽汉沽高值区。三区除PAHs含量有显著差别外,16种PAHs化合物的谱分布也有显著不同。根据不同化合物的含量关系及天津地区燃料消耗资料可以判定,南北低值区土壤中PAHs基本来自燃煤排放,而两个高值区污染来源复杂,除燃煤仍是主要来源外,其他重要来源还包括燃油和其他工业活动。Cluster analysis, anova, and multiple comparison were used to investigate the spatial distribution pattern of PAHs in the surface soils of Tianjin. It was revealed that the studied area can be categorized into three sub-area with similarity in PAH level and profile within each category, i.e. the Tanggu-Hangu area with the hightest in PAH level, the urban-suburb area with the relatively high in PAH level, and the rural area low in PAH level. In addition to PAH contents in the soil, the profile of 16 PAH compounds distinguished from one area to another. It was demonstrated that coal combustion is the only major source to the PAHs in the rural area, while vehicle emission as well as other industrial activities add more PAHs to the other two area in addition to input from coal combustion.

关 键 词：多环芳烃 土壤 聚类分析 空间分布 来源 

分 类 号：X592[环境科学与工程—环境工程]