研究多环芳烃菲和蒽在黑土不同粒径有机-矿质复合体中的老化现象,采用二氯甲烷提取法测定老化后多环芳烃菲和蒽的可提取性,比较不同粒径有机-矿质复合体中老化的速率.实验结果表明,老化90d后,菲的可提取率下降10%,蒽的可提取率下降30%,粘粒级复合体中最初阶段(0~15d)的老化速率最高,其余粒径复合体老化速率最高阶段基本都在15~28d.
Aging behaviour of polycyclic aromatic hydrocarbons (PAHs) phenanthrene and anthracene in organo-mineral aggregates from black soil were studied under laboratory incubation. Changes in their extractability and aging rate in different fractions of organo-mineral aggregates were determined through extraction by dichloromethane. After incubation for 90 days, the extractability of phenanthrene and anthracene were seen to be decreased about 10% and 30%, respectively. In clay fractions, the aging rate in the first period (from 0 to 15 days) appeared highest, while in the other three fractions, the higher aging rates existed basically in the period from 15 to 28 days.