摘要
通过对土壤/沉积物中天然有机质的组成分析,阐述了天然有机物在吸附疏水性有机污染物过程中所起的重要作用,其中包括可溶性有机质的增溶作用和不溶性有机质的吸附作用。本文着重探讨了天然有机质结构的异质性对吸附作用的影响,导致吸附等温线的非线性,从而从土壤/沉积物有机质的微观结构上进一步解释了非线性吸附机理。
This review analyzes components of natural organic matter (NOM) in soils and sediments and reveals important roles of natural organic matter in soils and sediments adsorbing hydrophobic organic contaminants (HOCs). Natural organic matter may control fate and transport of HOCs in the environment. Dissolved organic matter may increase solubility of HOCs and change their bioavailability in the water system. Nonlinearity of the sorption isotherms of HOCs is attributed to heterogeneity of structure of the organic matter in soils and sediments. Thus studies on organic matter microcosmic structure may further explain the mechanism of nonlinear adsorption.
出处
《土壤》
CAS
CSCD
北大核心
2005年第1期25-31,共7页
Soils
基金
国家重点基础研究发展规划(973)项目(G19990436)
国家自然科学基金重点项目(50239010)资助。
关键词
天然有机质
疏水性有机物
结构异质性
吸附作用
Natural organic matter, Hydrophobic organic contaminants, Heterogeneity, Sorption
