摘要
本文综述了最近对瑞典锯木厂位点氯酚(CP)污染的土壤和地下水中氯代芳香化合物在环境中的迁移转化研究。测定了防腐剂、颗粒有机物(POM)、溶解有机物(DOM)、地下水和地下水过滤颗粒中氯酚、多氯苯氧基苯酚(PCPPs)、多氯联苯醚(PCDEs)、多氯二苯并二恶英(PCDDs)和多氯二苯并呋喃(PCDFs)的相对比例。各物质中都发现了这些化合物类型的存在。与防腐剂中的含量相比,土壤样本中PCPPs、PCDEs、PCDDs和PCDFs组分均有所上升。研究表明这种升高与疏水性有关,即PCDDs的增加最快。疏水性与POM/DOM比率之间也具有类似的关系。溶解性更高的氯酚组成在POM和DOM中的分布相等。PCPPs、PCDEs、PCDDs和PCDFs在POM中的含量随着疏水性的增加而增加。尽管与DOM相比,POM相对含量较大,DOM和悬浮胶粒的协同传输使得这些化合物在地下水中的传输增加。
This paper summarizes recent studies on the environmental fate of chloroaromatic compounds in chlorophenol (CP)-contaminated soil and groundwater at Swedish sawmill sites.Relative proportions of CPs, polychlorinated phenoxy phenols (PCPPs),polychlorinated diphenyl ethers (PCDEs),polychlorinated dibenzo-p-dioxins (PCDDs),and polychlorinated dibenzofurans (PCDFs) were determined in preservatives,particulate organic matter (POM),dissolved organic matter (DOM),groundwater,and particles filtered from groundwater.All compound classes were found in the different compartments.The fraction of PCPPs,PCDEs,PCDDs,and PCDFs had increased in the soil samples relative to the proportions in the preservatives. This increase showed correlation with the hydrophobicity,that is,PCDDs had the largest increase.Similar correlation was found between hydrophobicity and the importance of partitioning to POM over DOM.The more water soluble compound group,CP,was foundequally distributed between POM and DOM. For PCPPs,PCDEs,PCDDs,and PCDFs,the relative partitioning to POM increased with increased hydrophobicity.Despite the relative partitioning towards POM,compared with DOM,cotransport with DOM and suspended colloidal fractions was found to substantially increase the transport of these compounds in the groundwater samples.
