Equilibrium and kinetic studies on the removal of Acid Red-14 from aqueous solutions using PSMA

Document Type: Regular Paper

Authors

1 Department Of Chemistry, Faculty of Science, Urmia University, Urmia, Iran

2 Department of Chemistry, Faculty of Science, Urmia University, Urmia, Iran

Abstract

The use of low-cost and ecofriendly adsorbents has been investigated as an ideal alternative to the current expensive methods of removing dyes from wastewater. In this study, not hydrolyzed poly (styrene- alternative- maleic anhydride) (PSMA) polymer have been used as new synthetic adsorbent to removal of acid red-14 dye from aqueous solutions (industrial wastes). Batch sorption studies have been carried out to determine the effect of agitation time, pH, adsorbent dose, initial concentration of the sorbate and temperature. The effect of electrolyte interference such as; 〖Na〗^+, 〖Cl〗^-, etc., on dyes removal efficiency were investigated. The acid red 14 dye showed maximal amount of sorption capacity as 5.12 mg/g at pH= 6.1 and 25 °C. Equilibrium data were fitted with Langmuir and Fleundlich Freundlich isotherms to find the best fit and it was found that the adsorption of this dye on adsorbents particles are monolayer and correspond to the Langmuir isotherm. Adsorption kinetics were investigated using pseudo first order and pseudo second order rate equations and kinetic data followed the pseudo second order rate equation for sorption of these this dye on PSMA adsorbent. The application of adsorbents performance was tested with real samples contain limit exceeded amount of foresaid dyes which had been taken from a Dyeing Factory. This study provides good background to development of dyes removal in waste waters by polymeric sorbent.

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