期刊论文

Lu, Haijun(lhj_whpu@163.com)

中文

东南大学学报(自然科学版)

1001-0505

2016

46

A01

174-178

10.3969/j.issn.1001-0505.2016.S1.031

国家自然科学基金资助项目（11672216）； 湖北省软科学研究资助项目（2016ADC096）； 湖北省自然科学基金资助项目（2016CFB636）；

本校为第一且通讯机构

针对填埋场黏土衬垫受重金属离子侵蚀的现状,采用污泥焚烧灰掺入黏土中制成改性黏土,在室内模拟填埋场衬垫受Cd (Ⅱ)污染的工况,通过静态平衡吸附试验,评价改性黏土对Cd(Ⅱ)的吸附效果；通过低温氮气吸附试验,分析改性黏土吸附Cd(Ⅱ)后的孔隙结构变化规律；通过污染物阻滞试验评价改性黏土阻滞污染物下渗的能力.结果表明：改性黏土对Cd (Ⅱ)的吸附属于Langmuir吸附模型,含污泥灰的改性黏土对Cd(Ⅱ)的理想最大吸附量增加31.9%~47.5%；吸附Cd(Ⅱ)后的改性黏土吸附脱附等温线属于Ⅳ型,并出现H3型滞回环,污泥灰掺量3%试样的比表面积为109.90 m2/g,比未掺污泥灰试样大14.9%；土层孔隙水中Cd(Ⅱ)的浓度...

To deal with the landfill liner eroded by heavy metal ions, the modified clay was prepared by clay mixed with sewage sludge ash (SSA). Under the action of Cd(II) in laboratory, the absorption effects of Cd(II) on the modified clay were tested by a batch test, the pore structure was determined by a low-temperature nitrogen adsorption test, and the ability of retard migration of contaminant was evaluated by a pollutant blocking test. The results show that the adsorption model of Cd(II) belongs to Langmuir adsorption model, the maximum adsorption ...