新型TMT-硫酸铁固定剂对重金属污染土壤的修复研究  

Soil remediation technology contaminated by heavy metals with a novel TMT-ferric sulfate stabilizer

作　　者：张江生[1] 周康根[1] 姜科[1] 董舒宇 岳楠[1] 

机构地区：[1]中南大学冶金与环境学院环境工程研究所,长沙410083

出　　处：《有色金属科学与工程》2014年第2期10-14,共5页Nonferrous Metals Science and Engineering

基　　金：国家科技支撑计划资助项目(2012BAC09B00)

摘　　要：以新型TMT(三巯基均三嗪三钠盐)-硫酸铁复配混合物为化学固定剂,考察了其对湖南郴州某重金属污染土壤中铅、镉、砷的固定效果.结果表明,单一使用TMT(含15%(质量分数)TMT的水溶液)为固定剂时,土壤中的有效态铅、镉去除率高于60%,但对砷没有固定效果.使用TMT-硫酸铁复配固定剂时,控制硫酸铁投加量为35.7 g/kg,TMT投加量为0.1 L/kg时,有效态铅、镉去除率达到90%以上.随着土壤含水量的增加,土壤中有效态铅、镉的含量显著降低.当控制硫酸铁投加量为35.7 g/kg,TMT投加量为0.04 L/kg,控制土壤含水量至田间持水量的70%,固定60 d,有效态铅、镉的去除率在80%以上,有效态砷的去除率可达到60%.The stable effect of lead （Pb）, cadmium （Cd）, arsenic （As） on the heavy metal polluted soils in Chenzhou Hunan with a novel stabilizer of TMT-ferric sulfate are investigated. The results show that the removal rate of the available contents of Pb , Cd in soil is higher than 60 % with the single use of TMT （aqueous solution containing 15 %TMT）as stabilizer, but there is no stable effect on As; the removal rate of the available contents of Pb, Cd in soil is higher than 90 % when TMT-ferric sulfate is used as stabilizer with 35.7 g/kg ferric sulfate and 0.1 L/kg TMT. The available contents of Pb , Cd decreases with the increase of soil water content. The available contents of Pb, Cd decrease more than 80 % and As 60 % with 35.7 g/kg ferric sulfate, 0.04 L/kg TMT and the soil water content is 70%of field capacity lasting 60 days.

关 键 词：土壤 铅 镉 砷 硫酸铁 

分 类 号：X53[环境科学与工程—环境工程]