东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2006, Vol. 27 ›› Issue (8): 922-925.DOI: -

• 论著 • 上一篇    下一篇

悬浮酵母菌吸附Pb(Ⅱ);Cr(Ⅵ)的机理

苏秀娟;朱一民;赵晨;魏德洲;   

  1. 东北大学资源与土木工程学院;东北大学资源与土木工程学院;东北大学资源与土木工程学院;东北大学资源与土木工程学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-23 修回日期:2013-06-23 出版日期:2006-08-15 发布日期:2013-06-23
  • 通讯作者: Su, X.-J.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50174014)

Mechanism of Pb(II)/Cr(VI) biosorption by saccharomyces cerevisiae

Su, Xiu-Juan (1); Zhu, Yi-Min (1); Zhao, Chen (1); Wei, De-Zhou (1)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2006-08-15 Published:2013-06-23
  • Contact: Su, X.-J.
  • About author:-
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摘要： 研究了悬浮酵母菌的动电电位及不同pH值下金属离子的赋存状态,探讨了悬浮酵母菌对Pb(Ⅱ),Cr(Ⅵ)的吸附机理.试验结果表明:悬浮酵母菌的零电点大致为3.7,随着pH值的升高,悬浮酵母菌的动电电位逐渐降低;在pH值小于4.0时,悬浮酵母菌对Pb(Ⅱ)的吸附以静电吸附为主;在pH值为2.0~6.0时,悬浮酵母菌对Cr(Ⅵ)的吸附以静电吸附为主,在其他pH值范围内,静电吸附不占主导地位.

关键词: zeta电位, 生物吸附机理, 悬浮酵母菌, Cr(Ⅵ), Pb(Ⅱ)

Abstract: Discusses the mechanism of Pb(II)/Cr(VI) biosorption by Saccharomyces cerevisiae through the zeta potentials and configuration of metal ions with different pH values. Experimental results showed that the isoelectric point of Saccharomyces cerevisiae is 3.7 approximately and that the zeta potentials of Saccharomyces cerevisiae decreases gradually with increasing pH value. The electrostatic biosorption is dominant in adsorbing Pb(II) when pH value is less than 4.0 and adsorbing Cr(VI) when pH value is 2.0-6.0, but isn't dominant when pH value are different from those as above.

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