Adsorption of 2, 4‐Dichlorophenoxyacetic Acid from an Aqueous Solution on Fly Ash. (1st March 2016)

• Record Type: Journal Article
• Authors: Kuśmierek, Krzysztof; Świątkowski, Andrzej
• Is Part Of: Water environment research. Volume 88:Number 3(2016)
• Page Start: 231
• Page End: 238
• Publication Date: 2016-03-01
• Subjects: 2, 4‐D -- adsorption -- fly ash -- low‐cost adsorbent; Water quality management -- Periodicals; Water -- Purification -- Periodicals; Water -- Pollution -- Periodicals; Water -- Pollution; Water -- Purification; Water quality management; Sewage; Water Pollution; Periodicals; Electronic journals; Periodicals; 628.16
• DOI: 10.2175/106143015X14212658613361
• Languages: English
• ISSNs: 1061-4303

Abstract

ABSTRACT: : The adsorption of 2, 4‐dichlorophenoxyacetic acid (2, 4‐D) on fly ash was studied. The effects of adsorbent dose, contact time, pH, ionic strength, and temperature on the adsorption were investigated. Adsorption kinetic data were analyzed using pseudo‐first and pseudo‐second order models, and results showed that adsorption kinetics were better represented by the pseudo‐second order model. Adsorption isotherms of 2, 4‐D on fly ash were analyzed using the Freundlich and Langmuir models. Thermodynamic parameters (Δ G °, Δ H °, and Δ S °) indicated that the adsorption process was spontaneous and endothermic. The negative values of Δ G ° and the positive value of Δ H ° indicate the spontaneous nature of 2, 4‐D adsorption on fly ash, and that the adsorption process was endothermic. Results showed that fly ash is an efficient, low‐cost adsorbent for removal of 2, 4‐D from water.