Biosorption of uranium by magnetically modified Rhodotorula glutinis
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- 作者：Jing Bai ; Xiaolei Wu ; Fangli Fan ; Wei Tian ; Xiaojie Yin ; Liang Zhao ; Fuyou Fan ; Zhan Li ; Longlong Tian ; Zhi Qin ; Junsheng Guo
- 关键词：Magnetical modification ; Uranium ; Biosorption ; Yeast ; Rhodotorula glutinis
- 刊名：Enzyme and Microbial Technology
- 出版年：2012
- 出版时间：10 December, 2012
- 年：2012
- 卷：51
- 期：6-7
- 页码：382-387
- 全文大小：498 K
文摘
Adsorption of uranium from aqueous solution onto the magnetically modified yeast cell, Rhodotorula glutinis, was investigated in a batch system. Factors influencing sorption such as initial solution pH, biomass dosage, contact time, temperature, initial uranium concentration and other common cations were analyzed. Sorption isotherm, kinetic and thermodynamic studies of uranium on magnetically modified R. glutinis were also carried out. The temperature dependent equilibrium data agreed well with the Langmuir model. Kinetic data obtained at different temperatures were simulated using pseudo-first-order and pseudo-second-order kinetic models, the pseudo-second-order kinetic model was found to describe the data better with correlation coefficients near 1.0. The thermodynamic parameters, ¦¤H¡ã, ¦¤S¡ã and ¦¤G¡ã were calculated from the sorption data gained at different temperatures. These thermodynamic parameters showed that the sorption process was endothermic and spontaneous. All results indicated that magnetically modified R. glutinis can be a potential sorbent for uranium wastewater treatment.