Ion exchange properties of onion skin and orange mesocarp: a sustainable approach to metal ion removal from aqueous solutions
Ion exchange properties of onion skin and orange mesocarp: a sustainable approach to metal ion removal from aqueous solutions
Sampson Kyei
Kumasi Technical University
Harriet Kwakye Boateng
Kumasi Technical University
Onyewuchi Akaranta
University of Port Harcourt, Nigeria.
Keywords: biosorption, heavy metal removal, ion exchange, onion skin, orange mesocarp, wastewater treatment
Abstract
Onion skin (OS) and orange mesocarp (OM) are agricultural wastes with potential for application in wastewater treatment. This review examines their ion exchange properties and their role in heavy metal removal from aqueous systems and wastewater. The presence of functional groups such as hydroxyl, carboxyl, and phenolic groups enables adsorption through ion exchange and surface interaction mechanisms. The performance of these materials is influenced by factors including pH, temperature, particle size, and contact time. Onion skin (OS) and orange mesocarp (OM) are agricultural wastes with potential for application in wastewater treatment. This review examines their ion exchange properties and their role in heavy metal removal from aqueous systems and wastewater. The presence of functional groups such as hydroxyl, carboxyl, and phenolic groups enables adsorption through ion exchange and surface interaction mechanisms. The performance of these materials is influenced by factors including pH, temperature, particle size, and contact time. Chemical modification improves adsorption capacity and stability. While these materials offer advantages such as low cost and availability, challenges remain in terms of variability, regeneration, and scalability. The review highlights their potential as sustainable alternatives to conventional ion exchange materials.
Chemical modification improves adsorption capacity and stability. While these materials offer advantages such as low cost and availability, challenges remain in terms of variability, regeneration, and scalability. The review highlights their potential as sustainable alternatives to conventional ion exchange materials.
Author Biographies
Sampson Kyei, Kumasi Technical University
Department of Chemical Engineering, Kumasi Technical University, Ghana
Harriet Kwakye Boateng, Kumasi Technical University
Department of Chemical Engineering, Kumasi Technical University, Ghana
Onyewuchi Akaranta, University of Port Harcourt, Nigeria.
Department of Pure and Industrial Chemistry, University of Port Harcourt, Nigeria.
