Skip to main content

ORIGINAL RESEARCH article

Front. Chem.
Sec. Catalytic Reactions and Chemistry
Volume 12 - 2024 | doi: 10.3389/fchem.2024.1458420
This article is part of the Research Topic Advances in Adsorbents and Catalysts: Solutions for Environmental Protection and Energy Storage View all articles

Efficient Phosphate Removal from Water Using Ductile Cast Iron Waste: A Response Surface Methodology Approach

Provisionally accepted
Mai H. Roushdy Mai H. Roushdy 1*Nada A. Elkhashab Nada A. Elkhashab 1Dr Ahmed I. Osman Dr Ahmed I. Osman 2*Dalia A. Ali Dalia A. Ali 1
  • 1 Department 0f Chemical Engineering, Faculty of Engineering, British University in Egypt, El-Sherouk, Cairo, Egypt
  • 2 School of Chemistry And Chemical Engineering, Faculty of Engineering and Physical Sciences, Queen's University Belfast, Belfast, Northern Ireland, United Kingdom

The final, formatted version of the article will be published soon.

    Water scarcity is a critical issue worldwide. This study explores a novel method for addressing this issue by using ductile cast iron (DCI) solid waste as an adsorbent for phosphate ions, supporting the circular economy in water remediation. The pseudo-second-order (PSO) kinetics model and Langmuir isotherm were fitted with the experimental results with maximum adsorption capacity (qmax = 0.28 mg/g). The thermodynamic analysis indicated that this adsorption process was spontaneous based on the negative value of Gibbs free energy (∆G). Additionally, the positive values of enthalpy (∆H) indicated the endothermic nature of this adsorption system. It was able to reach the highest adsorption percentage of 98.9 (%) for phosphate ions from aqueous solutions using response surface methodology (RSM) with optimum conditions of 10 mg/L phosphate ion concentration, pH = 8, normal room temperature, 9 min adsorption, and 0.5 g/L adsorbent dosage.

    Keywords: Adsorption, Solid Waste, Phosphates, Thermodynamics, optimization, Response Surface Methodology

    Received: 02 Jul 2024; Accepted: 13 Sep 2024.

    Copyright: © 2024 Roushdy, Elkhashab, Osman and Ali. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Mai H. Roushdy, Department 0f Chemical Engineering, Faculty of Engineering, British University in Egypt, El-Sherouk, 11837, Cairo, Egypt
    Dr Ahmed I. Osman, School of Chemistry And Chemical Engineering, Faculty of Engineering and Physical Sciences, Queen's University Belfast, Belfast, BT9 5AG, Northern Ireland, United Kingdom

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.