Articles
  • Analysis of the arsenic adsorption and desorption in iron oxyhydroxides (ferrihydrite and goethite) in a dynamic system

  • T. Alejandro De la Peña, M. Adrián Zamorategui*, A. Oscar Coreño and O. Norma Leticia Gutiérrez

  • Department of Civil and Environmental Engineering, University of Guanajuato, 36000 Guanajuato, Mexico

  • 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

Arsenic present in drinking water as a contaminant poses health risks. Iron oxyhydroxide granules were used as adsorbents to remove arsenic in a dynamic system in aqueous media. The granules were prepared with calcium alginate as a support medium. The results of the arsenic adsorption tests correspond to pseudo-first-order kinetics. The adsorption isotherms at various temperatures correspond perfectly to the Langmuir model. The thermodynamic parameters showed that the adsorption process is exothermic and spontaneous. The performance of a column packed with pellets to remove arsenic in an aqueous medium in a dynamic system was analyzed. The rupture curves showed arsenic adsorption capacities of approximately 30 mg/g for rupture times of 7 hours on average, agreeing with the experimental results with the Thomas model. Desorption tests for the recovery of removed arsenic showed the reusability of the column for up to three cycles.


Keywords: Adsorption, Desorption, Arsenic, Columns, Model Thomas.

This Article

  • 2025; 26(1): 162-171

    Published on Feb 28, 2025

  • 10.36410/jcpr.2025.26.1.162
  • Received on Aug 29, 2024
  • Revised on Dec 18, 2024
  • Accepted on Jan 10, 2025

Correspondence to

  • M. Adrián Zamorategui

  • Department of Civil and Environmental Engineering, University of Guanajuato, 36000 Guanajuato, Mexico
    Tel : +52-473-137 1216 Fax: +52-473-102-0100 ext. 5915

  • E-mail: zamorategui@ugto.mx