有机质官能团及微孔特性对疏水性有机污染物吸附的影响机制

Influence of functional groups and pore characteristics of organic matter on the sorption of hydrophobic organic pollutants

作为重要的地质吸附剂,土壤/沉积物中的有机质是环境中疏水性有机污染物主要的汇.由于有机质的结构异质性,疏水性有机污染物一旦进入其中,会被吸附在不同的位点上,反应活性和生态风险进而会发生变化.对疏水性有机污染物在有机质上的吸附进行研究有助于了解其在环境中的分布,传输及生物有效性.本文就疏水性有机污染物在土壤/沉积物中的有机质上吸附的国内外研究进展进行了综述,讨论了重要有机质组分(腐殖质和碳黑)的结构和吸附作用差异性,重点分析了有机质的微孔特性和官能团对吸附的影响机制.

Organic matter in soils and sediments,as an important geosorbent,is the main sink of organic pollutants. Owing to the structural heterogeneity of organic matter,organic pollutants are bound at different sorption sites once entering into soil environment,resulting in the change in reaction activity and ecological risk of organic pollutants. Studies on the sorption of organic pollutants can provide insight into their distribution,transport and bioavailability in environment. In this paper,many pivotal studies on the sorption of hydrophobic organic compounds were reviewed. The variances in the chemical structure and sorption property of organic matter fractions（ Humic substances and Black carbon） were also discussed. The mechanisms for the impact of pore characteristic and functional groups of organic matter on sorption were analyzed in detail.