Removal of Uranium(Ⅵ)by Fixed Bed Ion-exchange Column Using Natural Zeolite Coated with Manganese Oxide

CIESC Journal ›› 2009, Vol. 17 ›› Issue (4): 585-593.

Removal of Uranium(Ⅵ)by Fixed Bed Ion-exchange Column Using Natural Zeolite Coated with Manganese Oxide

邹卫华¹, 赵蕾¹, 韩润平^2,3

1. School of Chemical and Energy Engineering, Zhengzhou Univerity, Zhengzhou 450001, China;
2. Department of Chemistry, Zhengzhou University, Zhengzhou 450001, China;
3. Luoyang Company of China Petrolum&Chemical Corporation, Luoyang 471012, China

收稿日期:2008-07-08 修回日期:2009-03-30 出版日期:2009-08-28 发布日期:2010-12-30
通讯作者: HAN Runping, E-mail: rphan67@zzu.edu.cn
作者简介:
基金资助:
Supported by the National Science Foundation for Postdoctoral Scientists of China(20070Å20811);the Science and Technology Department of Henan Province in China(200510459016)

Removal of Uranium(Ⅵ)by Fixed Bed Ion-exchange Column Using Natural Zeolite Coated with Manganese Oxide

ZOU Weihua¹, ZHAO Lei¹, HAN Runping^2,3

1. School of Chemical and Energy Engineering, Zhengzhou Univerity, Zhengzhou 450001, China;
2. Department of Chemistry, Zhengzhou University, Zhengzhou 450001, China;
3. Luoyang Company of China Petrolum&Chemical Corporation, Luoyang 471012, China

Received:2008-07-08 Revised:2009-03-30 Online:2009-08-28 Published:2010-12-30
Supported by:
Supported by the National Science Foundation for Postdoctoral Scientists of China(20070Å20811);the Science and Technology Department of Henan Province in China(200510459016)

摘要/Abstract

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 adsorption capacity reached a maximum at pH of 6.3.The Thomas model was applied to the experimental data to determine 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 0.1mol·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.

关键词: adsorption, uranium(Ⅵ), manganese oxide coated zeolite, regeneration

Abstract: 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 adsorption capacity reached a maximum at pH of 6.3.The Thomas model was applied to the experimental data to determine 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 0.1mol·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.

Key words: adsorption, uranium(Ⅵ), manganese oxide coated zeolite, regeneration

邹卫华, 赵蕾, 韩润平. Removal of Uranium(Ⅵ)by Fixed Bed Ion-exchange Column Using Natural Zeolite Coated with Manganese Oxide[J]. CIESC Journal, 2009, 17(4): 585-593.

ZOU Weihua, ZHAO Lei, HAN Runping. Removal of Uranium(Ⅵ)by Fixed Bed Ion-exchange Column Using Natural Zeolite Coated with Manganese Oxide[J]. , 2009, 17(4): 585-593.

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Removal of Uranium(Ⅵ)by Fixed Bed Ion-exchange Column Using Natural Zeolite Coated with Manganese Oxide

Removal of Uranium(Ⅵ)by Fixed Bed Ion-exchange Column Using Natural Zeolite Coated with Manganese Oxide

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