期刊论文

Preparation of Zn-Ni-Fe Ternary Hydrotalcite and its Adsorption Properties for Uranium

中文

南华大学学报(自然科学版)

1673-0062

2022

36

01

14-24

10.19431/j.cnki.1673-0062.2022.01.003

国家自然科学基金项目（12075113）； 衡阳市土壤污染控制与修复重点实验室项目（2018HPT06）；

本校为第一机构

用水热法成功制备了蜂窝状的锌镍铁三元水滑石（ZnNiFe-LDH）,并将其用于吸附含铀废水中的铀。考察了溶液pH、吸附剂投加量、铀初始质量浓度等因素对ZnNiFe-LDH吸附U（Ⅵ）的影响，结合吸附前后材料的微观表征，探究了ZnNiFe-LDH对U（Ⅵ）作用机理。实验结果表明：当温度为25℃、pH为5、固液比为0.10 g/L时，ZnNiFe-LDH对10 mg/L铀的去除率为97.57%。吸附动力学和热力学实验表明：准二级动力学模型和Langmuir等温吸附模型的相关系数R~2更接近于1,表明ZnNiFe-LDH对铀的吸附是以化学吸附为主的单分子层吸附，且该反应是一个容易进行的自发吸热反应。反应前后材料的原子价态和晶相结构未发生明显变...

The honeycomb-shaped zinc-nickel-iron ternary hydrotalcite(ZnNiFe-LDH)was successfully prepared by hydrothermal method and used to adsorb uranium from uranium-containing wastewater.The effects of solution pH,adsorbent dosage,initial mass concentration of uranium and other factors on the adsorption of U(Ⅵ)by ZnNiFe-LDH were investigated.The mechanism of ZnNiFe-LDH on U(Ⅵ)was explored by combining the microscopic characterization of the materials before and after adsorption.The results show that the removal rate of 10 mg/L uranium by ZnNiFe-LDH...