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化学修饰啤酒酵母菌对铀的吸附特性

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成果类型:
期刊论文
作者:
彭国文;丁德馨;胡南;杨雨山;王晓亮
通讯作者:
Ding, D.(dingdxzzz@163.com)
作者机构:
School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China
[丁德馨; 胡南] Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, Hunan, China
[王晓亮] School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, Hunan, China
[彭国文] School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China<&wdkj&>Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, Hunan, China<&wdkj&>School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, Hunan, China
[杨雨山] School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China<&wdkj&>Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, Hunan, China
通讯机构:
Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
语种:
中文
关键词:
修饰啤酒酵母;化学修饰;铀;生物吸附;动力学模型
关键词(英文):
Biosorption;Chemical modification;Kinetics model;Modified Saccharomyces cerevisiae;Uranium
期刊:
化工学报
ISSN:
0438-1157
年:
2011
卷:
62
期:
11
页码:
3201-3206
基金类别:
50774047,10975071:国家自然科学基金 10C1180:湖南省教育厅科学研究项目 2010ks32:衡阳市科技局项目
机构署名:
本校为通讯机构
院系归属:
化学化工学院
核资源工程学院
摘要:
以甲醛为交联剂,将胱氨酸修饰到啤酒酵母菌(SC)上,并采用海藻酸钠和明胶固定化,得到一种新型的生物吸附剂——修饰啤酒酵母菌( MSC).通过红外光谱(IR)分别表征了两种吸附剂的结构,考察了其吸附铀的主要影响因素即溶液pH值、吸附时间等.结果表明:MSC细胞表面具有大量吸附铀的基团,MSC和SC吸附铀的最佳条件是:pH值为6.0,吸附时间分别为1.8、1.5h.对吸附动力学模型和吸附等温模型进行了分析,MSC和SC对铀的吸附动力学模型较好地符合了准二级动力学模型,MSC和SC的相关系数均大于0.99;吸附等温线均能符合Langmuir和Freundlich等温线模型,说明该吸附体系是一个单层覆盖与多层吸附相结合的吸附模式,且MS...
摘要(英文):
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 ...

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