Study on adsorption of uranium by inactivated Saccharomyces cerevisiae and volume reduction

被引：0
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作者：
Analytical and Testing Center, Southwest University of Science and Technology, Mianyang, China [1 ]
不详 [2 ]
不详 [3 ]
机构：
[1] Analytical and Testing Center, Southwest University of Science and Technology, Mianyang
[2] Key Laboratory of Solid Waste Treatment and the Resource Recycle(SWUST, Ministry of Education), Mianyang
[3] Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang
来源：
Gongneng Cailiao | / 23卷 / 23064-23070期
关键词：
Biosorption; Mechanism; Saccharomyces cerevisiae; U(VI); Volume reduction;
D O I：
10.3969/j.issn.1001-9731.2015.23.014
中图分类号：
学科分类号：
摘要：
The adsorption characteristics of U(VI) on inactivated saccharomyces cerevisiae were investigated by conducting a series of batch adsorption experiments in this study. The influence of solution pH, adsorbent dosage, initial U(VI) concentration, contact time were investigated. Scanning electron microscope (SEM) and Fourier transform infrared spectrometer (FT-IR) were used to characterize the surface structure and properties of the inactivated Saccharomyces cerevisiae before and after U(VI) adsorption, and to analyze the adsorption mechanism and adsorption kinetics of U(VI) on inactivated Saccharomyces cerevisiae. The experimental results showed that U(VI) removal rate increased with the increase of adsorbent dosage, and the highest adsorption reached at pH=3.0.The adsorption process fits pseudo-second-order kinetic model and Langmuir isotherm equation, and the maximum adsorption capacity for U(VI) was 45.44 mg/g. The initial concentration of 100 mg/L of U(VI) can be dropped to below 0.040 mg/L after 5-6 times cycle adsorption, and meet the national uranium wastewater discharge standards. Speculation for the behavior of U(VI) adsorption by inactivated Saccharomyces cerevisiae was both physical adsorption and chemical adsorption, exhibiting joint action of electrostatic attraction, redox reaction, chelating ligand and ion exchange. Hydroxyl, amidogen, carboxylic and carbonyl are the main functional groups in the reaction with U(VI). The result suggested that the inactivated saccharomyces cerevisiae may be potential application for wastewater treatment. © 2015, Chongqing Functional Materials Periodical Press Co. Ltd. All right reserved.
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页码：23064 / 23070
页数：6
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