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双金属和多金属系统对零价铁利用效率的改进

张道萍 孟凡生 王业耀 杨琦

张道萍, 孟凡生, 王业耀, 杨琦. 双金属和多金属系统对零价铁利用效率的改进[J]. 环境科学研究, 2016, 29(9): 1362-1369.
引用本文: 张道萍, 孟凡生, 王业耀, 杨琦. 双金属和多金属系统对零价铁利用效率的改进[J]. 环境科学研究, 2016, 29(9): 1362-1369.
ZHANG Daoping, MENG Fansheng, WANG Yeyao, YANG Qi. Improvement of Zero Valent Iron Efficiency by Bimetallic System and Multi-Metallic System[J]. Research of Environmental Sciences, 2016, 29(9): 1362-1369.
Citation: ZHANG Daoping, MENG Fansheng, WANG Yeyao, YANG Qi. Improvement of Zero Valent Iron Efficiency by Bimetallic System and Multi-Metallic System[J]. Research of Environmental Sciences, 2016, 29(9): 1362-1369.

双金属和多金属系统对零价铁利用效率的改进

基金项目: 国家自然科学基金项目(51308520);中央级公益性科研院所基本科研业务专项(2013-YKY-006)

Improvement of Zero Valent Iron Efficiency by Bimetallic System and Multi-Metallic System

  • 摘要: 为解决Fe0-PRB(零价铁-渗透反应格栅)中Fe0利用效率低、易板结堵塞的问题,分别采用粒径为0.074 mm的试剂铁粉和0.150~0.270 mm的工业铁粉为反应介质,在铁粉表面负载不同比例的Cu或Ni制备Cu/Fe、Ni/Fe双金属和Cu/Ni/Fe多金属颗粒,研究Fe0、双金属和多金属系统去除Cr(Ⅵ)的性能、机制.结果表明:双金属和多金属系统的Cr(Ⅵ)去除率明显高于Fe0,试剂铁粉的Cr(Ⅵ)去除率明显高于工业铁粉.反应8 h达到平衡后,试剂铁粉和工业铁粉的Cr(Ⅵ)去除率仅为45%和20%,Cu/Fe双金属、Cu/Ni/Fe多金属的Cr(Ⅵ)去除率均能达到90%以上,以试剂铁粉和工业铁粉制备的Ni/Fe双金属的Cr(Ⅵ)去除率最高分别为76.6%和44.0%.不同负载率的双金属和多金属系统反应过程中可溶的ρ〔Cr(Ⅲ)〕较低.反应后溶液的pH从反应前的5.0升至10.0左右.反应初期ρ(TFe)(TFe为总铁)超过了0.30 mg/L,其余时间均达标.反应过程中ρ(Cu2+)均在0.40 mg/L以下,均未检测出Ni2+.研究显示,双金属和多金属系统显著提高了Fe0利用效率.

     

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出版历程
  • 收稿日期:  2016-01-28
  • 修回日期:  2016-04-13
  • 刊出日期:  2016-09-25

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