新型废渣基固化剂修复污染土镍锌扩散特性研究  

Diffusion Characteristics of Nickel and Zinc in Stabilized/Solidified Soil by Novel Waste Residue-based Binder

作　　者：张庆[1] 董晓强[3] 冯亚松 李颖臻 杜延军[1] ZHANG Qing;DONG Xiaoqiang;FENG Yasong;LI Yingzhen;DU Yanjun(Institute of Geotechnical Engineering,Southeast University,Nanjing 211189,China;Jiangsu Provincial Academy of Environmental Science,Nanjing 210036,China;College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]东南大学岩土工程研究所,南京211189 [2]江苏省环境科学研究院,南京210036 [3]太原理工大学土木工程学院,太原030024

出　　处：《太原理工大学学报》2022年第5期963-970,共8页Journal of Taiyuan University of Technology

基　　金：国家重点研发计划资助项目(2019YFC1806000,2019YFC1804000);国家自然科学基金资助项目(41877248,42177133)。

摘　　要：评估了转炉钢渣-电石渣-磷石膏(BCP)固化剂对工业污染场地土中固化稳定后重金属污染物迁移参数的影响。通过自主研发的一维柱状扩散试验装置,结合菲克定律理论与Pollute V6.3计算程序,对比了重金属镍、锌污染土固化稳定化前后的有效扩散系数和分配系数。结果表明,BCP固化剂的添加使得Ni和Zn有效扩散系数降低约2个数量级,而分配系数显著提高2个数量级。添加固化剂的试样重金属Ni和Zn的分配系数分别为污染土的169和175倍。BCP固化剂能够明显提高污染土的环境安全性。In this paper the effect of BOFS-CCR-PG(BCP)binder was evaluated on the diffusion migration parameters of heavy metal after S/S in industrial contaminated site soil.The effective diffusion coefficient and the change of distribution coefficient of contaminated soil after S/S were investigated on a particular one-dimensional cylindrical diffusion test device,and on the basis of Fick’s law theory and Pollute V6.3 calculation program.The results show that the BCP can effectively reduce the effective diffusion coefficient of Ni and Zn by 2 orders of magnitude,while the distribution coefficient is significantly improved by 2 orders of magnitude.The distribution coefficient of Ni and Zn in BCP solidified soil is 169 and 175 times that in the contaminated soil,respectively.The BCP binder can significantly improve the environmental safety of contaminated soil.

关 键 词：重金属 固化稳定化 污染土 有效扩散系数 分配系数 

分 类 号：TU521.3[建筑科学—建筑技术科学]