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生态学杂志 ›› 2011, Vol. 30 ›› Issue (09): 1982-1987.

• 研究报告 • 上一篇    下一篇

贵阳市表层土壤中多环芳烃的分布特征及来源解析

胡健1**,张国平1,刘頔2,3,张岩林1,2,灌瑾1   

  1. 1中国科学院地球化学研究所环境地球化学国家重点实验室, 贵阳 550002;2中国科学院研究生院, 北京 100049;3中国科学院广州地球化学研究所, 广州 510640
  • 出版日期:2011-09-08 发布日期:2011-09-08

Distribution characteristics and source analysis of PAHs in topsoil of Guiyang City, Southwest China.

HU Jian1**, ZHANG Guo-ping1, LIU Di2,3, ZHANG Yan-lin1,2, GUAN Jin1   

  1. 1State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;2Graduate University of Chinese Academy of Sciences, Beijing 100049, China;3Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
  • Online:2011-09-08 Published:2011-09-08

摘要: 运用高效液相色谱仪对贵阳市区及近郊的表层土壤中16种多环芳烃(PAHs)进行了定量分析,对其分布特征、污染水平以及来源进行了探讨。结果表明:土壤中PAHs含量为61~1560 μg·kg-1,城区土壤样品中PAHs含量为247~1560 μg·kg-1,郊区土壤样品中PAHs含量为61~339 μg·kg-1,土壤中4环、5环PAHs含量较高,在土壤PAHs含量中占有绝对优势;参照国外环境标准,对区域表层土壤PAHs的污染现状进行了评价,结果显示,贵阳市表层土壤受到一定程度的PAHs污染。利用相关系数法和典型源三角图法对PAHs的可能来源进行了解析,发现贵阳市的土壤主要受到燃煤排放以及混合污染源——燃煤与汽车尾气排放PAHs的联合污染。

关键词: 摘顶, 放牧, 刈割, 人工草地, 适应性

Abstract: Topsoil samples were collected from the urban and suburban areas of Guiyang City to determine the concentrations of 16 polycyclic aromatic hydrocarbons (PAHs) by high performance liquid chromatography, with the distribution characteristics, pollution levels, and origins of the PAHs discussed. The total PAHs concentration in the samples varied from 61 to 1560 μg·kg-1, being 247-1560 μg·kg-1 for urban and 61-339 μg·kg-1 for suburban soils, respectively. In all the samples, PAHs were dominantly composed of 4- and 5-ring PAH species. Referred to some foreign environmental standards, the topsoil of Guiyang City was PAHs-contaminated to some extent. The analysis with correlation coefficient method and triangle drawing discriminance based on typical sources showed that the possible sources of PAHs in the topsoil of Guiyang were mainly the combustion of coals and the combined contamination of coal combustion and traffic exhaust.

Key words: Decapitating, Grazing, Cutting, Artificial grassland, Adaptability