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中文摘要：
选取位于珠江三角洲的佛山市顺德区作为研究对象，分析了该市26个代表性土壤样品中的多环芳烃的含量和组成，并对多环芳烃的来源进行探讨。结果显示，16种优控多环芳烃中有8种100％检出，其余8种也有不同程度的检出，检出率最低的化合物为蒽（7．9％）。在顺德区土壤中多环芳烃含量介于34．0～341．0μg·kg^-1，平均值为169．4μg·kg^-1。总体上顺德区土壤PAHs污染程度较轻，仅34．62％的样品受到了轻度污染。通过主成分分析，可以提取出2个主因子，进而推断，PAHs的主要来源是燃烧源，而萘的主要来源是石油源。R型聚类分析可以将除蒽和苊之外的14种PAHs化合物明显分为3类：（1）芴、二苯并[a，h]蒽、二氢苊、萘聚为一类；（2）苯并[k]荧蒽、苯并[a]芘、苯并[a]蒽聚为一类；（3）茚并[1，2，3-cd]芘、二苯并[a，h]蒽、苯并[b]荧蒽聚为一类，分类结果与PAHs化合物组分按照环数多少以及分子量大小基本一致，反映了多环芳烃在环境行为以及其本身化学性质的差异。
英文摘要：
The content of Polycyclic Aromatic Hydrocarbons （PAHs）of 26 soil samples collected from Shunde, which located in the Pearl River Delta were analyzed. The results showed that 8 components of PAHs were detected in all soil samples, and other 8 components were also detected in different degrees. The content of PAHs ranged from 34.0 to 341.0 μg·kg^-1 with the mean value of 169.4 μg·kg^-1. Soils in Shunde were polluted by PAHs lightly according to Maliszewska-Kordybach＇s study. It can be confirmed that the increase of PAHs in soil is connected to human activities closely. Principal Component Analysis was used to analysis the origins, and 2 components were extracted. It seemed that PAHs in Shunde were mainly from biomass burning. At last, PAHs componets were classified to 3 sorts through cluster analysis, and the result revealed the differences of environmental behavior and chemic-characters of PAHs.
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