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Biosorption of uranium by chemically modified Rhodotorula glutinis.

Abstract：

:The present paper reports the biosorption of uranium onto chemically modified yeast cells, Rhodotorula glutinis, in order to study the role played by various functional groups in the cell wall. Esterification of the carboxyl groups and methylation of the amino groups present in the cells were carried out by methanol and formaldehyde treatment, respectively. The uranium sorption capacity increased 31% for the methanol-treated biomass and 11% for the formaldehyde-treated biomass at an initial uranium concentration of 140 mg/L. The enhancement of uranium sorption capacity was investigated by Fourier transform infrared (FTIR) spectroscopy analysis, with amino and carboxyl groups were determined to be the important functional groups involved in uranium binding. The biosorption isotherms of uranium onto the raw and chemically modified biomass were also investigated with varying uranium concentrations. Langmuir and Freundlich models were well able to explain the sorption equilibrium data with satisfactory correlation coefficients higher than 0.9.

journal_name

J Environ Radioact

journal_title

Journal of environmental radioactivity

authors

Bai J,Yao H,Fan F,Lin M,Zhang L,Ding H,Lei F,Wu X,Li X,Guo J,Qin Z

doi

10.1016/j.jenvrad.2010.07.003

subject

Has Abstract

pub_date

2010-11-01 00:00:00

pages

969-73

issue

11

eissn

0265-931X

issn

1879-1700

pii

S0265-931X(10)00171-2

journal_volume

101

pub_type

杂志文章

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