Adsorption characteristics of Cs⁺ onto artificial zeolites synthesized from coal fly ash and diatomite

• DOI: 10.2109/jcersj2.123.1065
• Publication Date: 2015-11-30T22:11:48Z
• Authors: Erni JOHAN; Kohei YOSHIDA; Moses Wazingwa MU...; Naoto MATSUE; Yoshiteru ITAGAKI; Hiromichi AONO
• Keywords: Mordenite; Exothermic reaction

The radioactive decontamination of water, soil and other materials requires cheap effective adsorbents. Artificial zeolites synthesized from an industrial waste (coal fly ash: Na-P1 type zeolite) a natural material (diatomite: mordenite have high Cs+ adsorptivity in the adsorption experiments using 0.1 g zeolite 50 mL up to 7.5 mM CsCl. coexisting cation suppressed onto zeolites, effect suppression was order, K+ > Na+ Ca2+ Mg2+. A thermodynamic analysis proved that two exothermic favoring lower temperature. artificial showed greater strength, higher distribution coefficient ΔG°, especially at low concentrations. Adsorption isotherm by Langmuir, Freundlich, Temkin Dubinin-Radushkevich models selectivity for even pH.