期刊论文

Lu, H.

中文

环境工程学报

1673-9108

2015

9

9

4578-4584

2010-K6-29:住建部研究开发项目 D20141703:湖北省教育厅科学技术研究项目 51474168:国家自然科学基金

本校为第一且通讯机构

为了评价2%、5%、10%水泥固封镉污染土的处理效果,采用污染物释放实验、低温氮气吸附实验、热重-差热分析实验,检测水泥固封体的Cd~(2 +)浸出浓度、孔隙结构、物质组成与相变规律。未经水泥固封处理的镉污染土,其浸出液中Cd~(2 +)浓度高达9.72 mg /L;当水泥掺量> 5%后,水泥固封体的Cd~(2 +)浸出浓度低于国家标准1 mg /L,说明经水泥固封处理后的镉污染土对污染物的释放具有较好的密封效果。水泥固封镉污染土吸附脱附等温线属于IV型, 且存在H_3型滞回环。随着水泥掺量的增加,孔径为8 ~ 12 nm的孔隙数量增多;总孔容表现出先减少后增大的趋势,且水泥含量为10% 时,总孔容达到最大值,其值为0.151 cm3 ...

To evaluate the solidification effect of Cd-polluted clay containing 2%, 5%, 10% of cement, the pollutant release test, the low-temperature N2 adsorption test, the TG-DTA test were performed to determine the concentration of Cd(II) in the leachate, the pore structure, the constitute and phase transformation of the clay solidified by cement, respectively. From the test results, it showed that the Cd(II) concentration of leachate from Cd-polluted clay was as high as 9.72 mg/L. For the clay containing more than 5% of cement, the concentration of C...