大气中多环芳烃(PAHs)在松针和SPMD上的分布  

GASEOUS PAHs DISTRIBTION IN PINE NEEDLES AND SPMDs

作　　者：刘国卿[1] 张干[1] 刘向[1] 李军[1] 郭玲利[1] 

机构地区：[1]中国科学院广州地球化学研究所有机地球化学国家重点实验室,广州510640

出　　处：《环境化学》2005年第1期81-85,共5页Environmental Chemistry

基　　金：国家 973项目 ( 2 0 0 2CB410 80 3 );广东省团队基金资助 ( 2 0 0 0 3 0 46)

摘　　要：通过松针监测与半渗透膜被动式采样技术 (SPMD ) ,分析了我国珠江三角洲地区大气中多环芳烃的含量特征、来源及其分布 ,同时对这两种被动式采样技术进行了比较 松针及SPMD主要富集气态多环芳烃 (2— 4环 ) ,气态多环芳烃在松针和SPMD样品中的总含量分别为 313 9— 30 4 3 5ng·g-1和 14 5—116 9ng·SPMD-1·d-1 大气中多环芳烃含量的区域差异明显 ,珠江三角洲中部地区 (广州、佛山和东莞 )大气中多环芳烃的含量高 ,沿海地区的珠海、香港偏低 ,分子标志物指数表明 ,珠江三角洲大气中的多环芳烃主要是热成因 (燃烧 )来源 松针和SPMD对气态多环芳烃的监测具有很好的一致性 。Gaseous polycyclic aromatic hydrocarbons(PAHs) distribution and source in the pearl river delta were studied through two passive sampling techniques(pine needle) monitoring and semipermeable membrane devices (SPMD). The sequestered PAH compounds were mainly associated with gaseous PAHs. Total PAH concentrations in pine needles and SPMD ranged between 313.9—3043.5ng·g -1and 14.5—116.9 ng·SPMD -1·d -1, respectively. Significant differences in the atmospheric concentration of PAHs between sites were found, PAH concentration in pine needles and SPMDs were higher in Guangzhou, Fushan, and Dongguan (center of delta) than in Zhuhai and Hongkong (seaside). Molecular markers indicated that atmospheric PAH in this area were mainly combustion source. Excellent agreement in PAH levels and distributions was found between pine needle and SPMD sampling, they serve as good biomarkers of organic compounds in the environment.

关 键 词：多环芳烃(PAHs) 大气污染 采样技术 气态 生物指示 渗透膜 佛山 松针 监测 含量 

分 类 号：X831[环境科学与工程—环境工程] X513