Superior Ion-exchange Property of Amorphous Aluminosilicates Prepared by a Co-precipitation Method.,Chemistry - An Asian Journal

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Superior Ion-exchange Property of Amorphous Aluminosilicates Prepared by a Co-precipitation Method.
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2020-05-11 , DOI: 10.1002/asia.202000287
Naomichi Hikichi ₁ , Kenta Iyoki ₁ , Yutaka Yanaba ₂ , Koji Ohara ₃ , Tatsuya Okubo ₁ , Toru Wakihara ₁

Affiliation

The development of inexpensive inorganic ion‐exchangers for the purification of environmental pollutants is a social demand. Amorphous aluminosilicates with a relatively high homogeneous Al environment are prepared by a feasible co‐precipitation method, i. e., mixing an acidic aluminum sulfate solution and basic sodium silicate solution, which exhibit excellent ion‐exchange selectivity for Cs⁺ and Sr²⁺. The K _d value for Sr²⁺ was comparable with that of zeolite 4A. The local structures and ion‐exchange behavior of the amorphous aluminosilicates are systematically investigated. The ion‐exchange property of the amorphous aluminosilicates can be tuned by changing the interaction between the exchangeable cation and the amorphous aluminosilicates. Also, the amorphous aluminosilicates can adsorb bulky cations that zeolites hardly adsorb due to the limitation of the miropore size of zeolites.

中文翻译：

通过共沉淀法制备的非晶硅铝酸盐具有优异的离子交换性能。

开发用于净化环境污染物的廉价无机离子交换器是一项社会需求。采用可行的共沉淀方法制备具有较高均质Al环境的非晶硅铝酸盐。例如，将酸性硫酸铝溶液和碱性硅酸钠溶液混合，对Cs ⁺和Sr ²⁺表现出出色的离子交换选择性。Sr ²⁺的K _d值与4A沸石相当。系统研究了无定形硅铝酸盐的局部结构和离子交换行为。非晶态铝硅酸盐的离子交换特性可以通过改变可交换阳离子与非晶态铝硅酸盐之间的相互作用来调节。而且，由于沸石的微孔尺寸的限制，无定形硅铝酸盐可以吸附沸石难以吸附的大体积阳离子。

更新日期：2020-07-01

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