| 摘要: |
| 以重庆某铬渣堆场的污染土壤作为研究对象，利用直流电场将阳极（铁片）电解产生的Fe2+ 离子输送进入土壤，还原土壤中的Cr(Ⅵ)；实验结果表明，电解产生的Fe2+ 进入了土壤，并由阳极迁移至阴极；土壤中的Fe含量较初始值有明显增加，而Cr(Ⅵ)和Cr(Ⅲ)含量均低于初始值；实验过程中，沉淀物在靠近阳极端的集中沉积导致Cr(Ⅵ)在土壤中去除率分布严重不均。 |
| 关键词: 铬 污染土壤 电化学修复 铁电极 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Ｃｒ（Ⅵ）-contaminated Soil Remediation by Sacrificing Fe-anode |
|
HU Jing，LI Dong，HU Si-yang，YUAN Xing-zhong
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| Abstract: |
| Fe2+ ions produced at Fe anode migrated under direct electric field into the Cr contaminated soil from a chromium slag site in Chongqing to reduce the Cr(VI) in the soil. Experimental results show that Fe2+ produced at anode entered into the soil and migrated from the anode to the cathode. The Fe concentrations in soil increased significantly compared with the initial values, while Cr(Ⅵ) and Cr(Ⅲ) concentrations were lower than their initial values. In the course of the experiment, the emergence of precipitation in the soil near anode significantly affected the uniform distribution of Cr(Ⅵ) removal. |
| Key words: chromium contaminated soils electrochemistry remediation iron electrode |
