Selective uranium sorption from salt lake brines by amidoximated Saccharomyces cerevisiae
Selective uranium sorption from salt lake brines by amidoximated Saccharomyces cerevisiae
复制标题
偕胺肟化酿酒酵母从盐湖卤水中选择性吸附铀
DOI：
10.1016/j.cej.2015.08.011
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发表时间：
2016
影响因子：
15.1
通讯作者：
Junsheng Guo
中科院分区：
文献类型：
--
作者：
Shiwei Cao;Fuyou Fan;Zhi Qin;Junsheng Guo
In order to enhance the selectivity ofSaccharomyces cerevisiaefor uranium, amidoximation of the biomass was performed. The obtained biosorbent was characterized by FTIR and SEM analysis, results showed that amidoxime groups were successfully grafted on the biomass surface. The effects of initial solution pH, time, initial uranium concentration and ion strength on uranium sorption by the amidoximated biomass were studied and the optimal sorption conditions were determined. Furthermore, desorption results revealed that the amidoximated biosorbent can be used at least three times. The uranium sorption kinetics of both amidoximated and raw biomass can be depicted by the nonlinear pseudo-second-order kinetic equation. The nonlinear Langmuir and Freundlich models fitted well with the equilibrium data of amidoximated biomass. Trace uranium sorption from salt lake brine samples suggested that the selectivity ofS. cerevisiaewas obvious enhanced after amidoximation. The prepared amidoximated biomass can be used as a potential sorbent for selective uranium recovery from salt lake brines.
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