| 纳米Fe3O4负载的浮游球衣菌去除Cr(Ⅵ)的研究 |
| 摘要点击 2799 全文点击 2415 投稿时间：2006-10-08 修订日期：2006-12-13 |
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| 中文关键词 浮游球衣菌 纳米Fe3O4粒子 复合生物吸附剂 Cr(Ⅵ) 废水处理 |
| 英文关键词 Sphaerotilus natans nano Fe3O4 particles composite biosorbent chromium(Ⅵ) wastewater treatment |
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| 中文摘要 |
| 以纳米Fe3O4负载浮游球衣菌（Sphaerotilus natans）为复合生物吸附剂，考察了其对Cr(Ⅵ)的吸附性能，并对生物吸附机理进行了初步研究.结果表明，pH值是影响复合生物吸附剂吸附Cr(Ⅵ)的主要因素，吸附的最佳pH为2～3；用此复合生物吸附剂对Cr(Ⅵ)进行吸附，其单位吸附量为0.0217 mmol/g.用HCl对其进行再生，再生率在90％以上；—CONH2和—NH—是菌体吸附Cr(Ⅵ)的主要活性基团，静电吸引是复合生物吸附剂吸附Cr(Ⅵ)的主要机理之一. |
| 英文摘要 |
| The process of biosorption and the adsorbing mechanisms of Fe3O4/Sphaerotilus natans to Cr(Ⅵ) were studied. The experiment results showed that pH value was main influencing factors on adsorption to Cr(Ⅵ). In the range of pH 2 to 3, the adsorbance of the composite biosorbent to Cr(Ⅵ) is 0.0217 mmol/g. The regeneration efficiency is 90% when the composite biosorbent was regenerated by HCl solution. —CONH2— and —NH— were principal activated groups of composite biosorbent. Cr(Ⅵ) can primarily combine with the surface of Fe3O4/Sphaerotilus natans by electrostatic attraction. |
