The Sorption and Desorption Phenomera of Organic Hicro-Polhtants onto Lake and Riven Sadiments

由于湖泊和河流沉积物的疏水性，有机微污染物会被湖泊和河流沉积物吸附。本研究通过间歇实验研究了两种多环芳烃(芘和1-氨基比林)作为吸附剂和三种沉淀组分(腐植酸、实验室合成的蒙脱石和无定形铁水合成的沉淀物，以及腐植酸、蒙脱石和无定形铁水合成的沉淀物)作为吸附剂时的吸附与解吸平衡和动力学现象。沉积物中的腐植酸干扰了无机组分对1-氨基比林的吸附。

The organic micro-pollutants are sorbed by lake and river sediments due to their hydrophobicity. In this reserch, the sorption and desoption phenomena both equilibria and kinetics were investigated by two PAHs (pyrene and 1-aminopyrene) as sorbates and three types of sediment components (i.e., humic acid, sediment synthesized in the laboratory from montmorillonite and amorphous ferrihydrite, and sediment synthesized from humic acid, montmorillonite and amorphous ferrihydrite) as sorbents using batch experiments.The difference of polarity between two sorbates caused the difference of sorption and desorption phenomena among the components. The humic acid in sediments was considered to interfere the sorption of 1-aminopyrene by the inorganic components.