锰氧化物负载沸石固定床离子交换柱去除铀(VI)的研究 |
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引用本文: | 邹卫华,赵蕾,韩润平.锰氧化物负载沸石固定床离子交换柱去除铀(VI)的研究[J].中国化学工程学报,2009,17(4):585-593. |
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作者姓名: | 邹卫华 赵蕾 韩润平 |
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作者单位: | School of Chemical and Energy Engineering, Zhengzhou Univerity, Zhengzhou 450001, China ; Department of Chemistry, Zhengzhou University, Zhengzhou 450001, China ; Luoyang Company of China Petrolum & Chemical Corporation, Luoyang 471012, China ; |
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摘 要: | The adsorption of uranium (VI) on the manganese oxide coated zeolite (MOCZ) from aqueous solution was investigated in a fixed-bed column. The experiments were conducted to investigate the effects of bed height, flow rate, particle size, initial concentration of uranium (VI), initial pH, presence of salt and competitive ions. The U-uptake by MOCZ increased with initial uranium (VI) concentration and bed height, but decreased as the flow rate and particle size increased. In the presence of salt and competitive ions, the breakthrough time was shorter. The ad-sorption capacity reached a maximum at pH of 6.3. The Thomas model was applied to the experimental data to de-termine the characteristic parameters of the column for process design using linear regression. The breakthrough curves calculated from the model were in good agreement with the experimental data. The BDST model was used to study the influence of bed height on the adsorption of uranium (VI). Desorption of uranium (VI) in the MOCZ column was investigated. The column could be used for at least four adsorption-desorption cycles using 0.1 mol•L-1 NaHCO3 solution as the elution. After desorption and regeneration with deionized water, MOCZ could be reused to adsorb uranium (VI) at a comparable capacity. Compared to raw zeolite, MOCZ showed better capacity for uranium (VI) removal.
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关 键 词: | adsorption uranium (VI) manganese oxide coated zeolite regeneration |
收稿时间: | 2008-7-8 |
修稿时间: | 2009-3-30
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