关键词: 天然碳质吸附剂, 吸附机制, 有机污染物, 影响因素

Abstract:

A review is presented of classification,sources and basic properties of natural carbonaceous geosorbents（ CG）and mechanisms and features of their sorption of typical organic pollutants. The organic pollutants discussed here include polycyclic aromatic hydrocarbons（ PAHs）,polychlorinated biphenyls（ PCBs）,polybrominated diphenyl ethers（ PBDEs）,various pesticides and antibiotics,and also a number of polar,semi-polar,non-polar（ apolar） and ionic compounds,all quite extensive in representativeness. The Van der Waals force existing between CG-type materials and organic chemicals contributes significantly to the adsorption of the latter by the former,however,the force may be affected by properties（ like pore structure,characteristic groups） of the CG material and a desorbate molecular characteristics（ like molecular structure,functional groups）. Insight into mechanisms of CG adsorbing these typical organic compounds and their affecting factors will be of great significance to environmental risk assessment and remediation of contaminated soils and groudwater.

Key words: carbonaceous geosorbent, sorption mechanism, organic pollutant, influence factor