DYE REMOVAL FROM AQUEOUS SOLUTION BY MAGNETIC HYDROGEL

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DYE REMOVAL FROM AQUEOUS SOLUTION BY MAGNETIC HYDROGEL

Journal Title: Annals of the University of Oradea. Fascicle of Textiles, Leatherwork - Year 2018, Vol 0, Issue 2

Abstract

For coloration of products, dyes are used in various industries such as pulp, paper, leather, pharmaceuticals, and textiles. Disposal of colored textile wastewater into the environment, without efficient treatment, imposes serious damages to aquatic life by reducing sunlight penetration to water. Different treatment techniques including chemical coagulation, electrochemical coagulation, advanced oxidation processes, membrane technology, and adsorption have been applied to remove dyes from industrial wastewater. Among these, adsorption is an easy-operating, effective, and cost-effective option. Activated carbon has been employed for removal of various pollutants from wastewater, but it has high cost of regeneration. Hence low-cost adsorbents alternative to activated carbon are gaining attention in recent years. In the present study methylene blue was selected as the model dye molecule. Methylene blue adsorption kinetics and equilibrium of poly(viny) alcohol hydrogel films containing different amounts of magnetic particles were investigated. The hydrogels were synthesised by freezing-thawing method. The amounts of dye adsorbed by the hydrogels at equilibrium were in the range of 2.5–3.4 mg/g almost independent of the hydrogel magnetic particle content. The MB adsorption kinetics of the magnetic hydrogels can be represented by the pseudo-second order kinetic model and the model parameters were determined. It was not possible to desorb all the adsorbed dye by contacting the saturated hydrogels with water at 25C.

Authors and Affiliations

Güler NARİN, Uğur KİRAZ, Sena TEBER, Eylem KILIÇ

Keywords

EP ID EP433580
DOI -
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