| 摘要: |
| 为了研究零价铁去除水中Cr(Ⅵ)的效果及影响因素。在实验室条件下,通过批试验,考察了铁粉预处理、铁粉用量、初始pH及阳离子对六价铬去除的影响。结果表明:零价铁能够有效、快速的去除污染水体中的六价铬,机理为氧化还原和共沉淀;其去除率受铁粉预处理、铁粉投加量、初始pH及阳离子的影响;在酸性条件下,Fe2+浓度可以作为六价铬是否完全去除的指示剂。 |
| 关键词: 零价铁 六价铬 地下水 氧化还原 共沉淀 |
| DOI：10.11841/j.issn.1007-4333.2011.02.026 |
| 分类号: |
| 基金项目:陕西省自然科学基金(2005C105) |
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| Simulation on reduction of hexavalent chromium fromgroundwater using zero valent iron |
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LI Ya, ZHANG Zeng-qiang, TANG Ci-lai, YI Lei
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College of Resource and Environmen,Northwest Agriculture & Forestry University,Yangling 712100,China
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| Abstract: |
| In order to provide guidance for practical application in the remediation of groundwater pollution,the influencing factors of reduction of hexavalent chromium from solution were studied by batch experiment at laboratory scale,such as pretreated,amount of iron,initial pH and cation.The results showed that hexavalent chromium was removed quickly and effectively by zero valent iron,removal mechanism was redox and coprecipitation;the removal ratio was effected by the pretreatment with acid and nickelaqe,the amount of iron,initial pH and cation;Fe2+ could be used as an indicator for complete reduction of hexavalent chromium in the acidic condition. |
| Key words: zero valent iron hexavalent chromium groundwater redox coprecipitation |
