溶解有机质在土壤及沉积物吸附多环芳烃类有机污染物过程中的作用研究

被引：43

作者：

周岩梅

刘瑞霞

汤鸿霄

机构：

[1] 中国科学院生态环境研究中心环境水质学国家重点实验室

来源：

环境科学学报 | 2003年 / 02期

基金：

国家自然科学基金重点项目;

关键词：

溶解有机质; 天然吸附剂; 多环环芳烃; 快速吸附模型;

D O I：

10.13671/j.hjkxxb.2003.02.012

中图分类号：

X131 [环境污染化学];

学科分类号：

摘要：

研究了采自官厅水库及周围水域的 6种土壤及沉积物样品对多环芳烃类有机化合物———萘、菲、芘的吸附特性 ,应用1H NMR对这 6种土壤及沉积物样品中的溶解有机质的化学组成进行了的测定 ,发现溶解有机质中芳香族和非极性脂肪族化合物的含量与Freundlich吸附容量 (K′f)之间存在着密切关系 ,Freundlich吸附指数 (n)随着溶解有机质中极性基团的增多而降低 ,但是极性芳香族成分在吸附过程中主要充当有机溶剂相 .另外 ,吸附质的化学特性对吸附也有重要影响 ,logK′f 与logKow(Kow为辛醇水分配系数 )之间存在着线性关系 .依据溶解腐殖质的两性特征及上述结论建立了一种快速吸附模型 ,但此模型还很难直接用于无极性有机污染物的吸附规律预测

引用

页码：216 / 223

页数：8

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