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Lookup NU author(s): Dr Bulent Keskinler,
Professor Galip Akay
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Monolithic anion exchanger PolyHIPE media were used for the removal of nitrate anions from aqueous solutions. Both equilibrium and column adsorption tests and regeneration tests were carried out. The suitability of the Langmuir adsorption model to the equilibrium data was investigated. The maximum adsorption capacity was 0.215meq/g as per Langmuir isotherm at 20 degrees C. At a flow rate of 5ml/min (corresponding flux was 1.0cm/min) and 150mg/L nitrate feed concentration, breakthrough capacity and apparent capacity were 1.336meq /g resin and 2.842meq /g resin, respectively. Column experimental tests were conducted to provide data for theoretical modeling and to verify the system performance of the process. The theoretical column model adopted in this work was found to describe well, the ion-exchange breakthrough characteristics. After reaching equilibrium adsorption capacity, the monoliths were regenerated using 1N HCl and were subsequently retested. It was found that the regeneration efficiency reduced from 99% after second usage to 95% after the third usage.
Author(s): Barlik N, Keskinler B, Kocakerim MM, Akay G
Publication type: Article
Publication status: Published
Journal: Desalination and Water Treatment
Print publication date: 01/11/2016
Online publication date: 04/04/2016
Acceptance date: 06/03/2016
ISSN (print): 1944-3994
ISSN (electronic): 1944-3986
Publisher: Taylor & Francis Inc.
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