天津城郊土壤中PAHs含量特征及来源解析  

Content Character and Source Analyses of PAHs in soils of Tianjin Suburbs

作　　者：师荣光[1] 吕俊岗[2] 张霖琳[3] 

机构地区：[1]农业部环境保护科研监测所,农业部产地环境与农产品安全重点开放实验室,天津300191 [2]最高人民检察院检察技术信息研究中心,北京100040 [3]中国环境监测总站,北京100012

出　　处：《中国环境监测》2012年第4期1-5,共5页Environmental Monitoring in China

基　　金：中央级公益性科研院所基本科研业务费专项资金(农业部环境保护科研监测所)资助项目

摘　　要：以天津市郊环城四区为研究对象,系统采集了环城四区95个表层土壤样品,利用高效液相色谱仪对16种PAHs进行分析测定,结果表明,西青、东丽、津南和北辰土壤中16种PAHs的总量范围分别为62.6～1 994.9、36.1～4 074.7、20.1～2 502.5、22.1～707.7μg/kg;平均含量分别为445.8、841.8、509.5、242.5μg/kg。四区中都以高环多环芳烃为主,西青、东丽、北辰和津南高环多环芳烃分别占多环芳烃总比例的45.4%、42.2%、38.8%和38.7%。空间分析的结果表明,靠近天津市市区样点土壤中多环芳烃的含量要明显高于远离市区土壤中多环芳烃的含量。利用环数PAHs的相对丰度和比值法对天津市郊环城四区土壤中多环芳烃的污染来源进行了解析,研究区土壤监测样点的PAHs主要来自燃烧源,少部分来自石油类来源或几种污染源的共同复合累加的作用。Ninety-five samples of top soils were systematically collected in the Tianjin suburban areas.The concentrations of polycyclic aromatic hydrocarbons（PAHs） in the collected samples were determined by the high performance liquid chromatography.The total concentrations of tested polycyclic aromatic hydrocarbons in Xiqing,Dongli,Jinnan,Beichen ranged in 62.6-1 994.9,36.1-4 074.7,20.1-2 502.5,22.1-707.7 μg/kg and the averages of total concentration of polycyclicaromatic hydrocarbons were 445.8,841.8,509.5,242.5 μg/kg,respectively.PAHs with high ring were dominated in the four areas,the relative contribution of which were quantified as 45.4%,42.2%,38.8%,38.7%.The results of spatial distribution analysis showed that the concentration of PAHs in soil samples near urban were higher than that far from urban.Based on the relative abundances of PAHs different in ring number and ration method,PAHs sources of study area were examined.It was found that PAHs were mainly derived from the combustion sources and a few derived from petroleum source or combination and commutation of multiple pollution sources.

关 键 词：天津 城郊土壤 PAHS 污染特征 来源解析 

分 类 号：X825[环境科学与工程—环境工程]