Adsorption characteristics of uranium by <i>Saccharomyces cerevisiae</i> by chemical modification

PENG Guowen; DING Dexin; HU Nan; YANG Yushan; WANG Xiaoliang

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Adsorption characteristics of uranium by Saccharomyces cerevisiae by chemical modification

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- Adsorption characteristics of uranium by Saccharomyces cerevisiae by chemical modification
- CIESC Journal Issue 11, Pages: 3201-3206(2011)
- 作者机构：
  
  1. 中南大学资源与安全工程学院
  2. 南华大学铀矿冶生物技术国防重点学科实验室
  3. 南华大学化学化工学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： 0.3969/j.issn.0438-1157.2011.11.032
- Online First：05 November 2011，
  
  Published：05 November 2011
- 稿件说明：
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PENG Guowen, DING Dexin, HU Nan, et al. Adsorption characteristics of uranium by Saccharomyces cerevisiae by chemical modification[J]. CIESC Journal, 2011, (11): 3201-3206.
DOI：

PENG Guowen, DING Dexin, HU Nan, et al. Adsorption characteristics of uranium by Saccharomyces cerevisiae by chemical modification[J]. CIESC Journal, 2011, (11): 3201-3206. DOI：

摘要

Abstract

Modified Saccharomyces cerevisiae (MSC)was prepared from Saccharomyces cerevisiae (SC)by cystine modification and formaldehyde as crosslinker

and was immobilized by alginate sodium and glut. FTIR was used to characterize MSC and SC

and the effects of pH value and time on uranium adsorption over MSC and SC were investigated. It was found that there were many functional groups on the cell wall of MSC for adsorbing uranium. The optimal conditions for uranium adsorption were as follows: pH of the solution 6.0; the adsorption time for MSC and SC was 1.8 h and 1.5 h

respectively. The adsorption kinetics and isotherm models were proposed for adsorption of uranium on MSC and SC by fitting experimental data. The pseudo-second-order mode was better for both MSC and SC

their correlation coefficient better than 0.99(R2>0.99)

and Langmuir and Freundlich models were better isotherm models

indicating that the adsorption mode of uranium adsorption on MSC and SC was a combination of monolayer cover and multilayer adsorption. The capability of adsorption for MSC was 6.5 times that for SC

and indicated that MSC had potential as bioadsorbent.

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Adsorption characteristics of uranium by Saccharomyces cerevisiae by chemical modification

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摘要

Abstract

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