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›› 2015, Vol. 15 ›› Issue (2): 307-312.

• 生化工程专栏 • 上一篇    下一篇

铁氧化菌对含砷溶液中砷沉淀和臭葱石晶体形成的影响

曹俊雅 叶栩文 杜娟 赵欢 张广积 杨超1   

  1. 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所，中国科学院绿色过程与工程重点实验室
  • 收稿日期:2015-03-16 修回日期:2015-04-08 出版日期:2015-05-05 发布日期:2015-05-05
  • 通讯作者: 曹俊雅

Effects of Iron Oxidation Bacteria on Arsenic Precipitation and the Formation of Crystalline Scorodite from Arsenic-containing Solution

CAO Jun-ya YE Xu-wen DU Juan ZHAO Huan ZHANG Guang-ji   

  1. Institute of Process Engineering, CAS Institute of Process Engineering, CAS Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences Institute of Processing Engineering ，CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences
  • Received:2015-03-16 Revised:2015-04-08 Online:2015-05-05 Published:2015-05-05
  • Contact: CAO Jun-ya

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摘要： 在常压、pH=1.5、铁砷摩尔比1.5、不同温度、臭葱石晶种存在的条件下，考察了嗜酸氧化亚铁硫杆菌(Acidthiobacillus ferrooxidans, At.f)、中度嗜热西伯利亚硫杆菌(Sulfobacillus sibiricu, S.s)和嗜酸热古菌(Metallosphaera Ar, M.A)菌种对溶液中砷沉淀及臭葱石晶体形成的影响. 结果表明，在70℃, M.A菌种及臭葱石晶种存在的条件下，溶液中砷去除率达87%，且能形成结晶效果好、粒径大的长斜形臭葱石晶体.

关键词: 臭葱石, 砷, 铁氧化菌, 沉淀, 结晶

Abstract: Under the conditions of atmospheric pressure, initial pH 1.5, molar ratio of Fe to As 1.5, different temperatures (35, 50, 70℃), and existence of scorodite seeds, the influences of iron oxidation bacteria, Acidithiobacillus ferrooxidans, Sulfobacillus sibiricu and Metallosphaera Ar (M.A), on precipitation of arsenic in Fe(II) solution containing As(V) and formation of crystalline scorodite were investigated. The results show that higher temperature, bacteria and scorodite seeds can effectively promote the removal and precipitation of arsenic in the solution. Especially at 70℃ with M.A and in existence of scorodite seeds, the removal rate of arsenic reaches 87%, and the precipitate scorodite can form as fine and large rhomboid crystals.

Key words: scorodite, arsenic, iron oxidation bacteria, precipitation, crystallization

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