Preparation of Acid-Magnesium Modified Montmorillonite and Its Adsorption Performance for Phosphate

被引：0
|
作者：
Yu Y. [1 ]
Peng F. [1 ]
Jiang D. [2 ]
Li K. [3 ]
Chen T. [1 ]
Ma T. [3 ]
Feng L. [1 ]
机构：
[1] Chongqing Academy of Eco-Environmental Science, Southwest Branch of Chinese Academy of Environmental Sciences, Chongqing
[2] School of Environment and Resources, Chongqing Technology and Business University, Chongqing
[3] School of Materials Science and Engineering, Chongqing University, Chongqing
来源：
Cailiao Daobao/Materials Reports | 2023年 / 37卷 / 24期
关键词：
adsorption; modification; montmorillonite; phosphate;
D O I：
10.11896/cldb.22110326
中图分类号：
学科分类号：
摘要：
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. © 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.
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