期刊论文

Effects of electrokinetic technology with different enhancing agents on cadmium removal and enzyme activity in soil

Wang, P.

中文

环境工程学报

1673-9108

2018

12

8

2320-2327

10.12030/j.cjee.201803231

湖南省重点研发项目（2016SK2030）； 湖南省教育厅一般项目（湘财教指[2016]40号）；

本校为第一且通讯机构

为了探讨基于不同增强剂的电动技术对重金属污染土壤的修复效果,采用0.1%浓度的草酸、柠檬酸、已二胺四乙酸(EDTA)、甲基甘氨酸二乙酸(MGDA)作为阴极电解液,电压梯度3 V·cm~(-1)连续通电10 d,同时考查土壤中Cd的电迁移效果以及土壤酶(脲酶、酸性磷酸酶、过氧化氢酶)活性的变化.结果表明:相对于传统电动法(清水组),增强剂明显提高了Cd在土壤中的迁移效果,且人工螯合剂效果优于有机酸,对总Cd去除率为MGDA(63.08%)>EDTA(23.75%)>柠檬酸(18.43%)>草酸(16.41%)>清水(8.73%).相比于清水组,EDTA抑制了土壤中3种酶活性,柠檬酸、草酸可以改善脲酶和过氧化氢酶的活性,MGDA显著提高了3种酶的活性.结合Cd去...

Effects of different enhancing agents based electrokinetic technology for the remediation of heavy metals from contaminated soil were examined in laboratory-scale experiments. Enhancing agents at 0.1% (oxalic acid, citric acid, EDTA, MGDA) served as catholytes respectively, under a 3 V•cm-1 voltage gradient and electricity processing, the migration and removal of Cd and the activities of the enzymes (urease, acid phosphatase, catalase) in soil were studied concurrently. The results demonstrated that compared to the traditional group (without e...