摘要
对太湖疏浚污染底泥中含有的一种主要污染物——氨氮在底泥堆场黏土防渗层中的渗透和运移规律进行了试验研究。在室内通过渗透模拟试验和动态土柱试验,测定了不同固结压力作用下黏土的渗透系数和弥散系数,通过静态吸附试验测定了黏土对氨氮的吸附系数。试验结果表明,底泥堆场下部的黏土防渗层对底泥中的氨氮具有较强的吸附和阻隔能力。
The infiltration, transportation and transformation of a main contaminant （ammonia nitrogen） in the Taihu Lake sediment through a clayey soil layer are studied experimentally. The permeability coefficient and diffusion coefficient under different pressures are determined through the laboratory tests of stimulation test of infiltration and dynamic soil column test. The adsorption coefficient of ammonia nitrogen to clay soil is also obtained through the static adsorption test. The test results show that the ammonia nitrogen is mainly adsorbed and obstructed by the clayey soil layer in a facility for the dredged sediments from Taihu Lake.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2008年第1期28-32,共5页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(No.50678003)
北京市自然科学基金项目(No.kz200710005004)
高等学校博士点基金(No.20060005012)
关键词
污染底泥
渗透
运移
吸附
黏土防渗层
contaminated sediment
infiltration
transportation
adsorption
clay impermeable layer
