Ammonium adsorption, desorption and recovery by acid and alkaline treated zeolite. (December 2021)

• Record Type: Journal Article
• Authors: Muscarella, Sofia Maria; Badalucco, Luigi; Cano, Beatriz; Laudicina, Vito Armando; Mannina, Giorgio
• Is Part Of: Bioresource technology. Volume 341(2021)
• Publication Date: 2021-12
• Subjects: Clinoptilolite -- Resource recovery -- Ammonium exchange capacity -- Alkaline and acid treatments -- Ammonium kinetic adsorption; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.125812
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Practical and simple solutions are needed to improve zeolite adsorption ability. Zeolites can be used for NH4 + adsorption and desorption. The effect of alkaline and acid pre-treatment of clinoptilolite was investigated. Clinoptilolite adsorption ability was improved by NaCl treatment. Under static conditions, clinoptilolite adsorbed 11.9 mg NH4 + g −1 . Abstract: In this study, the suitability of zeolite as a possible medium for ammonium adsorption, desorption and recovery from wastewater was investigated. Specifically, batch adsorption and desorption studies with solutions enriched in NH4 + were conducted employing zeolite to evaluate how the chemical treatment and contact time affect adsorption and desorption. Several experimental tests were carried out considering both untreated and treated zeolite. Untreated and HCl-Na treated zeolite adsorbed up to 11.8 mg NH4 + g −1 and showed the highest efficiency in recovering NH4 + from aqueous solution. Regardless of pre-treatment, treatments with NaCl resulted in higher and faster adsorption of NH4 + than treatments with CaCl2 and MgCl2 .