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化工学报  2014 

Al(OH)3胶体的制备及其对铀的吸附机理

DOI: 10.3969/j.issn.0438-1157.2014.04.018, PP. 1279-1286

Keywords: Al(OH)3,制备,,吸附,动力学,等温线

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Abstract:

为了研究在地浸采铀中胶体对矿层的阻塞及对铀酰离子吸附迁移影响,采用硝酸铝与氨水为原料制备Al(OH)3,并用在pH=6条件下制备所得的Al(OH)3对铀进行吸附实验研究,考察了吸附的pH值、初始浓度及吸附时间等对Al(OH)3吸附铀的影响。对实验数据使用准一级、复合二级与Elovich动力学模型进行计算与分析,得出Elovich动力学方程更适合描述Al(OH)3对铀吸附,吸附主要是表面吸附;使用Freundlich与Langmuir等温吸附方程对实验数据进行拟合,结果表明Langmuir模型更适合描述Al(OH)3对铀酰离子的吸附;对吸附前、后的Al(OH)3进行SEM与激光粒度分析。

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