腐殖酸在去除水体和土壤中有机污染物的作用

本文叙述了腐殖质的结构及性质,并论述了其与有机污染物结合的特征,即通过疏水作用和氢键作用吸附有机污染物, 表现为增强有机污染物在水体中的溶解度,降低挥发度,增加光解速率以及改变生物可利用率和影响有机污染物毒性等.介绍了腐殖质在去除有机污染物技术中的应用,对染色污染物有较高的去除率,具有较高的净化效果.腐殖酸还可以通过提高PAHs的溶解性和加速PAHs对微生物的生物可利用性来加速PAHs的生物降解.腐殖质的存在可以增加PCBs的溶解性,增加特效菌在腐殖质不同比率的条件下对PCBs不同的接近程度.文章最后指出了腐殖质在今后环境保护领域的发展趋势和研究方向.

Effects of Hmic Substances for Removing Organic Pollutants from Water and Soil

The paper summarizes the properties of humic substances,and discusses the combining characteristics with organic pollutants including adsorption organic pollutants by hydrogen bonds and hydrophobic interactions,solvability enhancement of organic pollutants in the aqueous matrix,evaporation decrease,strength of photo-degradation rate,change of bioavailability and effect on toxicity of organic pollutants etc.Furthermore,the application of humic substances for removing the organic pollutants from water and soil are introduced,humic substances has the higher cleanse effect to coloration contamination,and HA is thought to accelerate the degradation of polycyclic aromatic hydrocarbons(PAHs) by enhancing PAH solubility and increasing the PAH bioavailability to microorganisms,humic substances also can increase solubilization of PCBs and to a different accessibility of PCBs by the specialized bacteria.At the last the potential research tendency of humic substances in the field of environmental protection is indicated.