Kinetics and isothermal adsorption of U(VI) in aqueous solution by nano-Ni0
Kinetics and isothermal adsorption of U(VI) in aqueous solution by nano-Ni0
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纳米Ni-0对水溶液中U(VI)的动力学和等温吸附
DOI：
10.1007/s10967-020-07056-1
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发表时间：
2020-02-19
影响因子：
1.6
通讯作者：
Xiao, Hui
中科院分区：
文献类型：
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作者：
Chen, Yujie;Sang, Weixuan;Xiao, Hui
采用液相还原法制备了纳米零价镍（nano-Ni-0），并利用BET、XPS、FT-IR和XRD等手段对纳米零价镍进行了表征。数据用Langmuir和Freundlich模型进行分析。动力学数据采用准一级动力学和准二级动力学模型进行分析。结果表明，纳米Ni-0对U（VI）有较好的去除效果，反应后XPS谱图中出现了Ni 2+和U 4+的峰，表明U（VI）被还原为U（IV），Ni-0被氧化为Ni 2+和Ni 3+。动力学和等温吸附模型表明，吸附过程为表面单分子层吸附，受化学吸附速率控制。
The nanoscale zero-valent nickel (nano-Ni-0) was prepared by liquid-phase reduction method and characterized by BET, XPS, FT-IR and XRD and be used to remove U(VI) from aqueous solution. The data were analyzed by the Langmuir and Freundlich models. The kinetic data were analyzed by pseudo-first-order kinetic and pseudo-second-order models. The results showed that the nano-Ni-0 had a good removal efficient on U(VI), after reaction, the peaks of Ni2+ and U4+ appeared in XPS spectra, which revealed that the U(VI) was reduced to U(IV) and Ni-0 was oxidated to Ni2+ and Ni3+. The kinetics and isothermal models showed that the adsorption process was surface monolayer adsorption and was controlled by chemical adsorption rate.