Articles
  • Adsorption of Cr(III) from aqueous media on zeolite A prepared from fused fly ash by hydrothermal synthesis

  • Ulambayar Rentsennorova, Batmunkh Davaabala, Bayaraa Dovchinb and JadambaaTemuujina,*

  • aLaboratory of Materials Science and Technology, Institute of Chemistry and Chemical Technology, Mongolian Academy Sciences, Ulaanbaatar 51, Mongolia
    bDepartment of Chemistry, School of Mathematics and Natural Sciences, Mongolian National University of Education, Ulaanbaatar, Mongolia

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this work, the potential application of using zeolite A synthesized from fly ash to remove Cr (III) from aqueous solutions was studied. Zeolite A was synthesized from acid-washed fly ash by alkali fusion followed by hydrothermal treatment. The acid washing removed Ca and Fe from the fly ash, which allowed synthesis of the required zeolite. The acid-washed fly ash and NaOH were mixed at a mass ratio of 1:1.2 and heated at various temperatures. The hydrothermal zeolite synthesis was carried out at 600 oC temperature and the product characterized by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). The zeolite achieved maximum adsorption capacity of Cr (III) attaining equilibrium within 30 min at pH 4.0. The adsorption isotherm for Cr (III) on this zeolite A was tested and showed that the adsorption data of Cr (III) were fitted best by a Langmuir isotherm


Keywords: Fly ash, Acid leaching, Hydrothermal synthesis, Zeolite A, Cr (III) removal

This Article

  • 2021; 22(2): 232-239

    Published on Apr 30, 2021

  • 10.36410/jcpr.2021.22.2.232
  • Received on Nov 4, 2020
  • Revised on Dec 28, 2020
  • Accepted on Dec 29, 2020

Correspondence to

  • JadambaaTemuujin

  • Laboratory of Materials Science and Technology, Institute of Chemistry and Chemical Technology, Mongolian Academy Sciences, Ulaanbaatar 51, Mongolia
    Tel : +976-11-453334 Fax: +976-11-453331

  • E-mail: temuujin.mgl@gmail.com