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Superior Ion‐exchange Property of Amorphous Aluminosilicates Prepared by a Co‐precipitation Method
Author(s) -
Hikichi Naomichi,
Iyoki Kenta,
Yanaba Yutaka,
Ohara Koji,
Okubo Tatsuya,
Wakihara Toru
Publication year - 2020
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202000287
Subject(s) - aluminosilicate , amorphous solid , ion exchange , sodium aluminosilicate , inorganic chemistry , precipitation , adsorption , zeolite , materials science , chemical engineering , chemistry , sodium silicate , ion , catalysis , organic chemistry , metallurgy , physics , meteorology , engineering
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 Sr 2+ . The K d value for Sr 2+ 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.