新型MIL-100(Fe)基MOFs材料的制备及其对Sr<sup>2+</sup>的吸附

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Abstract Metal-organic framework materials MIL-100(Fe) and MIL-100(Fe)-DMA were prepared by hydrothermal and solvothermal methods. The structures of materials were characterized by FTIR, XRD, SEM, XPS and N₂ adsorption/desorption. The effects of initial Sr²⁺ concentration, adsorption time, pH value of solution and different co-existing cations on the adsorption performance of the materials were investigated by static adsorption experiments; The adsorption kinetics and adsorption isotherms models of Sr²⁺ adsorption on the two materials were studied. The results showed that the basic framework of the two materials was consistent, and the effect of adsorbed Sr²⁺ on the material framework can be ignored. Although the specific surface area of MIL-100(Fe)-DMA was smaller than that of MIL-100(Fe), the mesoporous structure formed by accumulation was more conducive to the diffusion of Sr²⁺ due to the small grain size. The results of adsorption experiments showed that: with the increase of the reaction time and the initial Sr²⁺ concentration, the adsorption capacity of the two materials for Sr²⁺ increased rapidly and then gradually reached equilibrium. With the increase of pH value, the adsorption amount of Sr²⁺ by the two materials increased, and the adsorption effect was better under alkaline condition. The adsorption process of both materials conformed to the quasi-second-order kinetic model, Weber-Morris models and the Langmuir adsorption isothermal model. The adsorption of Sr²⁺ by MIL-100(Fe) materials can be improved by using trivalent iron salt as iron source and DMA as organic solvent.

Key words： metal organic framework material MIL-100(Fe) Sr²⁺ adsorption

Received: 27 May 2020

PACS:

X703.5

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	Articles by authors
	ZHANG Qi-Xin
	YAO Chu-Qing
	XU Tian-Han
	CHAI Fan-Chao
	WANG Guo-Hui
	DAI Yao-Dong

Cite this article:

ZHANG Qi-Xin,YAO Chu-Qing,XU Tian-Han等. Novel MIL-100(Fe) based MOFs materials and their adsorption on Sr²⁺[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(1): 141-150.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I1/141

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