Influence of dissolved organic matter (DOM) on environmental behaviors of organic pollutants in soils

Abstract

Abstract: Dissolved organic matter (DOM) is an important component of solutions in terrestrial and aquatic ecosystems through its influence on acidity, nutrient availability, and toxicity. DOM could enhance the apparent solubility of organic pollutants and alter adsorption-desorption equilibrium of organic pollutants on soil. The enhancement of organic pollutants desorption in the presence of DOM could facilitate the mobility of organic pollutants in soil. On the other hand, the sorption of DOM by solid sorbents in soil could also enhance the retention of DOM-associated organic pollutants in soil. Furthermore, as a photosensitizer, DOM could promote the photogradation of organic pollutants in soil. And under certain condition, DOM also affected the hydrolysis of organic pollutants in soil solution. The effects of DOM on environmental behaviors of organic pollutants in soils were related to the physico-chemical characteristics of organic pollutants, DOM, and soil.

Key words: Dissolved organic matter, Soil, Organic pollutant, Environmental behaviors

CLC Number:

X171

LING Wanting, XU Jianmin, GAO Yanzheng, WANG Haizhen. Influence of dissolved organic matter (DOM) on environmental behaviors of organic pollutants in soils[J]. Chinese Journal of Applied Ecology, 2004, (2): 326-330.

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