岩棉负载纳米零价铁去除溶液中U(Ⅵ)的性能和机理

doi:10.11896/cldb.22040131

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Abstract Nano zero-valent iron loaded on rock wool (RW/nZVI) was prepared by liquid phase reduction method, and the material composition and microstructure were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The removal ability of U(Ⅵ) in solution was taken as the evaluation index, and the isothermal adsorption model and kinetic model was used to study the mechanism on U(Ⅵ) removal from aqueous solution. The results show that the aggregation of nano zero-valent iron can be obviously reduced by being loaded on rock wool, and the removal effect on U(Ⅵ) from the aqueous solution has been improved. The adsorption isotherm accords with Langmuir model, and the maximum adsorption capacity by simulation was 79.681 mg/g. The kinetic process accords with the pseudo-secon-dorder adsorption kinetic model and the pseudo-first-order reduction kinetic model, which indicates that the adsorption is monolayer adsorption and U(Ⅵ) in the solution is removed by adsorption and reduction.

Key words： rock wool nano zero-valent iron load uranium adsorption reduction

Published: Online: 2022-10-26

CLC number:

TQ424

Fund:National Natural Science Foundation of China(11465002, 41760190).

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	Articles by authors
	LI Xiaoyan
	FU Xiaohui
	LI Guanchao
	WANG Yuying
	HUANG Xi
	LIU Xiaoliang
	HU Weifang
	LIU Yibao

Cite this article:

LI Xiaoyan,FU Xiaohui,LI Guanchao, et al. Performance and Mechanism on Removal of U(Ⅵ) from Aqueous Solution by Nano Zero-valent Iron Loaded on Rock Wool[J]. Materials Reports, 2022, 36(20): 22040131-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22040131 OR http://www.mater-rep.com/EN/Y2022/V36/I20/22040131

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