摘要
针对污染地下水中铬酸根和硝酸根迁移速度快,可渗透反应墙(PRB)常规活性材料修复效果差等问题,以铁屑、麦饭石和硫酸盐还原菌(SRB)为活性材料,构建4组耦合PRB动态柱修复地下水中Cr(Ⅵ)和NO-3-N。结果表明,4#(铁屑、麦饭石和SRB)柱修复效果较1#(麦饭石)、2#(铁屑、麦饭石)和3#(麦饭石和SRB)柱好,且稳定,对Cr(Ⅵ)和NO-3-N平均去除率分别是97.7%和97.34%,可见,以铁屑、麦饭石和硫酸盐还原菌为活性材料的耦合PRB系统修复地下水中Cr(Ⅵ)和NO-3-N具有有效性与可行性。
Aiming at the problem of the fast migration speed of chromium and nitrate in polluted groundwater and the low efficiency of treating with conventional activity materials of permeable reactive barrier( PRB),with iron,medical stone,sulfate-reducing bacteria( SRB) as active materials,4 groups of PRB columns of coupling system were built to deal with chromium and nitrate in groundwater. The results showed that Column 4( iron,medical stone and SRB) is obviously better than Column 1( medical stone),Column 2( iron,medical stone),Column 3( medical stone,SRB),which has the average removal rates of 97. 7% and 97. 34% on Cr( Ⅵ) and NO-3-N. It is obvious that the coupling system of PRB with iron,medical stone and SRB is effective and feasible for repairing Cr( Ⅵ) and NO-3-N in groundwater.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第1期145-149,共5页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(41102157
51304114)
辽宁省自然科学基金资助项目(2015020619)
关键词
污染地下水
铬酸根
硝酸根
耦合体系
可渗透性反应墙
polluted groundwater
chromium
nitrate
coupling system
permeable reactive barrier