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首页> 外文会议>8th China international nanoscience and technology symposium >Hexavalent Chromium Removal from Water Using Chitosan-Fe0 Nanoparticles
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Hexavalent Chromium Removal from Water Using Chitosan-Fe0 Nanoparticles

机译：使用壳聚糖-Fe0纳米颗粒从水中去除六价铬

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摘要

Chitosan-Fe0 nanoparticles (chitosan-Fe0) were prepared using nontoxic and biodegradable chitosan as a stabilizer. Laboratory batch and column experiments were conducted to investigate the feasibility of using chitosan-Fe0 for in situ reductive removal of Cr(Ⅵ) from water. Batch kinetic tests indicated that the overall disappearance of Cr(Ⅵ) may include both physical adsorption of Cr(Ⅵ) onto the chitosan-Fe0 surface and subsequent reduction of Cr(Ⅵ) to Cr(Ⅲ). The rate of reduction of Cr(Ⅵ) to Cr(Ⅲ) can be expressed by a pseudo-first-order reaction kinetics and the rate constants increase with the increase in iron loading. Cohirm experiments indicated that the chitosan-Fe0 were highly deliverable in the column. When the column was treated with Cr(Ⅵ)-contaminated deionized water, the removal capacity of chitosan-Fe0 was found to be about 32 mg Cr/g Fe(0). A 25% drop in the Cr(Ⅵ) removal capacity was found when treated with Cr(Ⅵ)-contammated surface water.
机译：使用无毒且可生物降解的壳聚糖作为稳定剂，制备了壳聚糖-Fe0纳米颗粒（壳聚糖-Fe0）。进行了实验室批和柱实验，以研究使用壳聚糖-Fe0原位还原去除水中的Cr（Ⅵ）的可行性。间歇动力学试验表明，Cr（Ⅵ）的总体消失可能包括Cr（Ⅵ）在壳聚糖-Fe0表面上的物理吸附以及随后Cr（Ⅵ）还原为Cr（Ⅲ）的过程。 Cr（Ⅵ）还原为Cr（Ⅲ）的速率可以通过拟一级反应动力学来表示，速率常数随铁负载的增加而增加。 Cohirm实验表明，壳聚糖-Fe0在色谱柱中具有很高的可传递性。用受Cr（Ⅵ）污染的去离子水处理色谱柱时，发现壳聚糖-Fe0的去除能力约为32 mg Cr / g Fe（0）。用Cr（Ⅵ）污染的地表水处理后，发现Cr（Ⅵ）的去除能力下降了25％。

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  • 来源
  • 会议地点 Xiangtan(CN);Xiangtan(CN)
  • 作者

    LI Tielong; GENG Bing; ZHANG Na; JIN Zhaohui; QI Xinhua;

  • 作者单位

    College of Environmental Science and Engineering/Tianjin Key Laboratory of Environmental Remediation and Pollution Control/Ministry of Education Key Laboratory of Environmental Processes and Criteria,Nankai University,Tianjin 300071,China;

    Institute of Environment and Sustainable Development in Agriculture,The Chinese Academy of Agricultural Sciences,Beijing 100081 P RChina;

    College of Environmental Science and Engineering/Tianjin Key Laboratory of Environmental Remediation and Pollution Control/Ministry of Education Key Laboratory of Environmental Processes and Criteria,Nankai University,Tianjin 300071,China;

    College of Environmental Science and Engineering/Tianjin Key Laboratory of Environmental Remediation and Pollution Control/Ministry of Education Key Laboratory of Environmental Processe;

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  • 正文语种 eng
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