酸-镁改性蒙脱土的制备及对磷酸盐吸附性能的研究

doi:10.11896/cldb.22110326

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Abstract The acid-Mg modified montmorillonite (MgHMT) was prepared by dipping method using montmorillonite as raw materials, hydrochloric acid and magnesium sulfate heptahydrate as modifiers. Its adsorption performance for phosphates was studied. Scanning electron microscopy (SEM), X-Ray Diffractomer, surface area and pore size analysis (BET), X-ray photoelectron spectroscopy (XPS) were used for the analysis of morphology and structure. The results showed that the surface structure of the material did not change significantly after the modification, but its specific surface area decreased and the average pore diameter increased. Mg ions are loaded onto montmorillonite in the form of intercalated electrons. The adsorption of phosphate by HHMT can reach adsorption equilibrium within 10 min. The adsorption process conformed to the Langmuir adsorption model, and its adsorption performance was 2.1 times higher than that of pure montmorillonite. The adsorption process was dominated by chemical adsorption, and the presence of ammonia nitrogen promoted the adsorption of phosphate.

Key words： modification montmorillonite phosphate adsorption

Published: Online: 2023-12-19

CLC number:	TB34
	X52

Fund:Chongqing Technology Innovation and Application Demonstration Project (cstc2018jszx-zdyfxmX0013), and Chongqing Research Institution Performance Incentive and Guidance Project (cstc2019jxjl50004).

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	Articles by authors
	YU Yichang
	PENG Feng
	JIANG Debin
	LI Kailin
	CHEN Tingting
	MA Tengfei
	FENG Li

Cite this article:

YU Yichang,PENG Feng,JIANG Debin, et al. Preparation of Acid-Magnesium Modified Montmorillonite and Its Adsorption Performance for Phosphate[J]. Materials Reports, 2023, 37(24): 22110326-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22110326 OR http://www.mater-rep.com/EN/Y2023/V37/I24/22110326

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