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废啤酒酵母去除水中重金属镉的作用机理

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李小娜, 戴友芝, 王未平, 吴金钢, 汪桂芝. 废啤酒酵母去除水中重金属镉的作用机理[J]. 环境化学, 2012, 31(12): 1886-1890.
引用本文: 李小娜, 戴友芝, 王未平, 吴金钢, 汪桂芝. 废啤酒酵母去除水中重金属镉的作用机理[J]. 环境化学, 2012, 31(12): 1886-1890.
shu
LI Xiaona, DAI Youzhi, WANG Weiping, WU Jingang, WANG Guizhi. Mechanism of cadmium removal in aqueous solution by waste beer yeast[J]. Environmental Chemistry, 2012, 31(12): 1886-1890.
Citation: LI Xiaona, DAI Youzhi, WANG Weiping, WU Jingang, WANG Guizhi. Mechanism of cadmium removal in aqueous solution by waste beer yeast[J]. Environmental Chemistry, 2012, 31(12): 1886-1890.
shu

废啤酒酵母去除水中重金属镉的作用机理

  • 1.

    湘潭大学化工学院环境工程系,重金属污染控制湖南省高校重点实验室, 湘潭, 411105

  • 基金项目:

    水体污染控制与治理科技重大专项(2010ZX07212-008)

    湖南省科学技术厅科技计划重点项目(2011SK2016)资助.

Mechanism of cadmium removal in aqueous solution by waste beer yeast

  • 1.

    Department of Environmental Science and Technology,Key Laboratory of Heavy Metal Pollution Control, College of Hunan Province Xiangtan University, Xiangtan, 411105, China

  • Fund Project:

  • 摘要: 利用废啤酒酵母为生物吸附材料处理水溶液中的Cd2+.为了考察废啤酒酵母表面官能团在生物吸附过程中的作用,分别对废啤酒酵母进行甲醇、甲醛化学修饰,使其表面的羧基发生酯化反应、胺基发生甲基化反应.同时对反应前后溶液pH值的变化进行了监测.结果表明,酯化反应后,废啤酒酵母吸附Cd2+的能力降低,证实羧基在Cd2+吸附中起到了重要作用;甲基化反应后,废啤酒酵母吸附Cd2+的能力升高,是因为反应后pH值变化使Cd2+发生无机微沉淀作用而去除.表面官能团以及pH升高引起的沉淀对镉去除起重要作用.
    Abstract: Waste beer yeast was used as an adsorbent for the removal of cadmium from water. The biomass was modified separately by methanol and formaldehyde in order to study the role played by the functional groups on the surface of the waste beer yeast in biosorption of cadmium. And the change of pH before and after adsorption was also monitored. Esterification of the carboxyl groups present in the biomass decreased the biosorption capacity of cadmium, which suggests that carboxylic acid played an important role in biosorption of cadmium. However, formaldehyde-treated biomass increased the biosorption capacity, due to the change of pH after the reaction and subsequent precipitation and removal of Cd2+. Functional groups and the precipitation caused by pH increase are important for the removal of cadmium by the waste beer yeast.
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  • [1] 代群威,董发勤,张伟.干废弃啤酒酵母菌对铅离子的吸附及FTIR分析[J]. 光谱学与光谱分析,2009,29(7):1788-1792
    [2] 蔡俊雄,周俊伟,崔龙哲,等.废啤酒酵母吸附水溶液中Ni(Ⅱ)和Cd(Ⅱ)的性能[J]. 环境科学与技术,2009,32(4):149-152
    [3] 陈灿,王建龙.酿酒酵母与Ag+的相互作用机制研究[J]. 环境科学, 2008,29(12):3561-3567
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    [7] 陈灿,王建龙. 酿酒酵母吸附Zn(Ⅱ)过程中阳离子(K+,Mg2+,Na+,Ca2+)的变化分析[J]. 环境科学,2006,26(11):2261-2267
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  • 收稿日期:  2012-01-06
李小娜, 戴友芝, 王未平, 吴金钢, 汪桂芝. 废啤酒酵母去除水中重金属镉的作用机理[J]. 环境化学, 2012, 31(12): 1886-1890.
引用本文: 李小娜, 戴友芝, 王未平, 吴金钢, 汪桂芝. 废啤酒酵母去除水中重金属镉的作用机理[J]. 环境化学, 2012, 31(12): 1886-1890.
shu
LI Xiaona, DAI Youzhi, WANG Weiping, WU Jingang, WANG Guizhi. Mechanism of cadmium removal in aqueous solution by waste beer yeast[J]. Environmental Chemistry, 2012, 31(12): 1886-1890.
Citation: LI Xiaona, DAI Youzhi, WANG Weiping, WU Jingang, WANG Guizhi. Mechanism of cadmium removal in aqueous solution by waste beer yeast[J]. Environmental Chemistry, 2012, 31(12): 1886-1890.
shu

废啤酒酵母去除水中重金属镉的作用机理

  • 1. 湘潭大学化工学院环境工程系,重金属污染控制湖南省高校重点实验室, 湘潭, 411105
  • 收稿日期:  2012-01-06
基金项目:

水体污染控制与治理科技重大专项(2010ZX07212-008)

湖南省科学技术厅科技计划重点项目(2011SK2016)资助.

摘要: 利用废啤酒酵母为生物吸附材料处理水溶液中的Cd2+.为了考察废啤酒酵母表面官能团在生物吸附过程中的作用,分别对废啤酒酵母进行甲醇、甲醛化学修饰,使其表面的羧基发生酯化反应、胺基发生甲基化反应.同时对反应前后溶液pH值的变化进行了监测.结果表明,酯化反应后,废啤酒酵母吸附Cd2+的能力降低,证实羧基在Cd2+吸附中起到了重要作用;甲基化反应后,废啤酒酵母吸附Cd2+的能力升高,是因为反应后pH值变化使Cd2+发生无机微沉淀作用而去除.表面官能团以及pH升高引起的沉淀对镉去除起重要作用.

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