中文摘要：

研究了自然水体中生物膜、悬浮颗粒物和表层沉积物3种典型固相物质对有机氯农药的吸附动力学特征.研究结果表明,有机氯农药在3种固相物质上的吸附动力学过程可分为快吸附阶段和慢吸附阶段.准二级动力学模型较好地描述了三者对有机氯农药的吸附动力学过程.吸附平衡时,3种固相物质对有机氯农药吸附量的大小与它们的有机质含量顺序一致,即,生物膜〉悬浮颗粒物〉表层沉积物;而在吸附初期阶段,有机质含量最低的表层沉积物对有机氯农药的吸附速率最快,吸附量的波动变化幅度最大,其次为悬浮颗粒物和生物膜.

英文摘要：

This study investigates the sorption kinetics of organochlorine pesticides on three typical types of solids involving biofilms, suspended particles and surface sediments sampled from natural waters. Results indi cated that the process of sorption kinetics of organochlorine pesticides on the three solids could be divided into two stages： fast sorption and slow sorption. Pseudosecondorder model could provide a more satisfactory fitting performance in this work. Equilibrium sorbed amount of organochlorine pesticides by the three solids showed the order： biofilms〉suspended particles〉surface sediments, which is consistent with the order of contents of organic matters in these solids. However, during the initial sorption stage, the rate of organochlorine pesticides sorbed by the surface sediments, which contain the least organics, was the fastest and the extent of variation of sorbed amount was the greatest, followed by suspended particles and biofilms.