太原理工大学学报2018，Vol.49Issue(3)：406-411,6.DOI:10.16355/j.cnki.issn1007-9432tyut.2018.03.006
土壤中的Cr在纳米铁修复过程中的降解分离
Separation and Degradation State of Cr During the Process of nZVI Remediation in Soil
摘要
Abstract
A dynamic soil column test was conducted to study the leaching pattern between va-rious soils and Cr(total),Cr(VI)and Cr(III),under the action of nanoscale zero-valent iron and deionized water.According to the results,the concentration and accumulation of the Cr in soil under the water runoff differ in different stages of washing.The washout effect lies between 0~1.5 L chiefly.When organic matter content of the soil is high,the adsorption effect on Cr(total) is enhanced,and the concentration of Cr(total)increases slowly.When the organic matter con-tent increases from 0.24% to 11.40%,the total amount of Cr(total)that is washed out by nZVI decreases by 0.716 mg at 2 L.For the soil with organic content of 0.24%~11.40%,the nZVI reaction system has good treatment effect on Cr(VI)contaminated soil.In this paper,R1.5and R6 values are used to define the proportion of the accumulation amount of the washout Cr(total)to the starting Cr within the typical range.With the Cr (III)index of apparent adsorption amount, the degradation and separation state of the Cr(VI)in the washout process is quantitatively de-fined.The research result in this paper has an important reference value for soil heavy metal treatment technology.关键词
土壤/铬/纳米零价铁/还原/吸附Key words
soil/chromium/nano zero valent iron/reduction/adsorption分类
资源环境引用本文复制引用
李平,曹青,张弛,张思思..土壤中的Cr在纳米铁修复过程中的降解分离[J].太原理工大学学报,2018,49(3):406-411,6.基金项目
山西省重点研发计划(20150313002-2,201703D321005) （20150313002-2,201703D321005）
