中文摘要：

底泥疏浚是治理太湖污染的必要途径之一。限于目前国内的经济与技术条件以及疏浚底泥的数量巨大，太湖雪浪底泥堆场只能直接采用下部的天然黏性土层作为防渗层而不加任何处理。为了确保疏浚污染底泥在堆放期间不对周围环境和地下水造成污染，采用渗透与阻隔、静态吸附、动态土柱等试验测定和分析了黏土层对底泥中主要污染物（总氮、氨氮、硝氮、亚硝氮、．总磷、化学耗氧量（COD））渗透和运移的阻隔能力，同时得到了可用于分析污染物在土层中运移和转化规律的一些重要参数。试验结果表明，雪浪堆场下部的黏土层对疏浚底泥中的主要污染物具有较强的吸附和阻隔能力。

英文摘要：

One of the necessary ways to control water pollution of Taihu Lake is to dredge its polluted sediments. Owing to our country＇s current economic and technical limitations as well as the enormous quantity of contaminated dredged sediments, the underneath cohesive soil layers without any treatment are directly selected as impervious barrier of the Xuelang confined disposal facility （CDF）. In order to prevent contaminants in dredged sediments from polluting surrounding environment and groundwater during dumping, a comprehensive experimental study for evaluating the ability of these soil layers to retard infiltration and transportation of main contaminants （total nitrogen, ammonia nitrogen, nitrite nitrogen, total phosphorus, chemical oxygen demand （COD）） in dredged sediments has been made using permeability test, static adsorption test, dynamic soil column test and so on. It is shown that the clay layers beneath the Xuelang CDF are capable to adsorb and retard the main contaminants greatly.