Ion-exchange capability for ammonium removal using zeolite modified by potassium permanganate

In this study, the ability to remove ammonium aqueous solutions of the natural zeolite particles produced in Jinzhou, Liaoning and the zeolite particles modified by potassium permanganate were characterized by using the static adsorption experiments. The results showed that ammonia adsorption capacity of natural zeolite is preferable, and adsorption capacity of the zeolite particles modified by potassium permanganate is slightly lower, but still maintain preferential adsorption. In addition, the Freundlich isotherm model proved a better fit in the description of ammonia adsorption process than Langmuir model both for the natural zeolites and zeolite particles after potassium permanganate treatment, with R2 ranging from 0.9328 to 0.9893. The adsorption kinetic data of ammonium onto the zeolite particles modified by potassium permanganate could be well described by a pseudo-second-order kinetics equation. Copyright © 2016, AIDIC Servizi S.r.l.