半胱氨酸盐酸盐改性膨润土对铀的吸附研究

doi:10.13218/j.cnki.csdc.2014.03.029

日用化学工业 ›› 2014, Vol. 44 ›› Issue (3): 126-130.doi: 10.13218/j.cnki.csdc.2014.03.029

半胱氨酸盐酸盐改性膨润土对铀的吸附研究

王光辉, 胡苏杭, 韩晨

东华理工大学水资源与环境工程学院,江西抚州 344000

收稿日期:2013-12-30 发布日期:2019-04-09
作者简介:王光辉(1968-),男,教授,博士,电话:(0794)8258287,E-mail:wgh68611@163.com。
基金资助:
国家自然科学基金资助项目(41261078,40861017);江西省自然科学基金资助项目(20114BAB203029);江西省教育厅科技资助项目(GJJ12374)

Study on adsorption of uranium onto bentonite modified by cysteine hydrochloride

WANG Guang-hui, HU Su-hang, HAN Chen

College of Water Resources and Environmental Engineering,East China Institute of Technology,Fuzhou,Jiangxi 344000,China

Received:2013-12-30 Published:2019-04-09

摘要/Abstract

摘要： 以钠基膨润土为原料,通过与半胱氨酸盐酸盐的离子交换反应制得改性膨润土。研究改性后的膨润土对铀的吸附行为,以及初始质量浓度和pH对吸附的影响,探讨改性后的膨润土对铀的吸附等温线、吸附热力学规律和吸附动力学规律。结果表明,改性后的膨润土对铀的吸附性能明显提高,吸附规律较好地符合Langmuir吸附等温式,最大吸附量为39.06 mg·g^-1;该吸附反应为吸热反应,升高温度有利于吸附反应的进行;吸附动力学模型可用准二级反应动力学方程来描述,其二级反应速率常数为0.017 90 g·mg^-1·min^-1。

关键词: 膨润土, 半胱氨酸盐酸盐, 铀, 吸附行为

Abstract: Using bentonite as raw material,the modified bentonite was prepared by ion exchange reaction of bentonite with cysteine hydrochloride.Uranium adsorption behavior of the modified bentonite,as well as effect of initial mass concentration and pH on the adsorption were investigated and described.Adsorption isotherms,adsorption thermodynamics and adsorption kinetics of uranium onto modified bentonite were also studied.The results showed that the adsorption capacity of the modified bentonite for uranium is significantly higher than that of unmodified bentonite.The adsorption pattern of uranium onto the modified bentonite follows the Langmuir model very well,and the maximum adsorption capacity of the modified bentonite is 39.06 mg·g^-1.The adsorption process is an endothermic reaction and higher temperature is favorable for adsorption of uranium.The pseudo-second-order kinetics model was used to describe the adsorption process,and the adsorption kinetics constant was found to be 0.017 90 g·mg^-1·min^-1.

Key words: bentonite, cysteine hydrochloride, uranium, adsorption behavior

中图分类号:

王光辉, 胡苏杭, 韩晨. 半胱氨酸盐酸盐改性膨润土对铀的吸附研究[J]. 日用化学工业, 2014, 44(3): 126-130.

WANG Guang-hui, HU Su-hang, HAN Chen. Study on adsorption of uranium onto bentonite modified by cysteine hydrochloride[J]. China Surfactant Detergent & Cosmetics, 2014, 44(3): 126-130.

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半胱氨酸盐酸盐改性膨润土对铀的吸附研究

Study on adsorption of uranium onto bentonite modified by cysteine hydrochloride

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