长江三角洲地区土壤环境质量与修复研究 Ⅴ.典型地区农业土壤中多环芳烃的污染状况及其源解析

SOIL ENVIRONMENTAL QUALITY AND REMEDIATION IN YANGTZE RIVER DELTA REGION Ⅴ.POLLUTION STATUS AND SOURCES OF POLYCYCLIC AROMATIC HYDROCARBONS IN AGRICULTURAL SOILS OF TYPICAL DISTRICTS

对长江三角洲典型地区（无锡和台州）农业表层土壤（0-20cm）中15种美国环境保护署（USEPA）优控的多环芳烃（PAHs）含量和来源进行了研究。结果表明，无锡地区农业土壤中15种PAHs总量的含量范围为1058—9500／μgkg^-1，PAHs污染较重，主要来源于石油以及石油和草／木材／煤的燃烧，PAHs的组成以4—6环为主；台州地区农业土壤中PAHs的含量范围为128—604μgkg^-1，PAHs污染较轻，主要来源于石油以及石油的燃烧，PAHs的组成以3—6环为主。

The contents and sources of 15 USEPA priority PAHs in agricultural surface soils （0-20 cm） of typical districts, Wuxi and Taizhou in the Yangtze River Delta were studied. The results showed that the PAHs pollution was heavy in agricultural soils of Wuxi district and the sum of 15 PAHs contents ranged from 1 058 to 9 500μg kg^- 1. The composition of PAHs was mainly 4 to 6 rings and the main sources were petroleum and combustion of petroleum, grass, wood and coal. In agricultural soils of Taizhou district, the PAHs pollution was light and the sum of 15 PAHs contents ranged from 128 to 604 μg kg^-1. The composition of PAHs was mainly 3 to 6 rings and the main sources were petroleum and petroleum combustion.