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Removal of Hg (II) ions from aqueous solution by acid acrylic resin A Study through Adsorption isotherms Analysis

Author Affiliations

  • 1 Department of Chemistry, Sri Ramakrishna mission Vidyalaya College of Arts and Science, Coimbatore-641 020, Tamil Nadu, INDIA
  • 2 Department of Chemistry, Sri Ramakrishna mission Vidyalaya College of Arts and Science, Coimbatore-641 020, Tamil Nadu, INDIA

Int. Res. J. Environment Sci., Volume 1, Issue (1), Pages 34-41, August,22 (2012)

Abstract

The feasibility of using Amberlite IRC-86, a weak acid cation- exchange resin as an adsorbent for mercury (II) ions removal was examined. The influences of experimental parameters such as pH, initial mercury concentration, and agitation time and resin dosage were investigated. The data were analyzed on the basis of Lagergren pseudo-first order, Ho pseudo-second order, Langmuir, Freundlich and Redlich- Peterson isotherm models. The ion -exchange process, which is pH dependant, indicated that maximum removal of mercury (II) was obtained at pH 70.1 and a resin dosage of 0.1g. Through fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and scanning electron microscopy coupled energy dispersive X-ray (SEM-EDAX) analysis, the ion -exchange mechanism was confirmed. Finally, the resin can be regenerated by treatment of the spent resin with HCl. The experimental results indicate that Amberlite IRC-86, weak acid cation exchange resin is a promising adsorbent, which could be used effectively for the removal of mercury (II) ions from aqueous medium.

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