ADSORPTION CHARACTERISTICS OF VICTORIA BLUE ON LOW COST NATURAL SAND AND ITS REMOVAL FROM AQUEOUS MEDIA

Arun Kant, Monika Datta

Abstract


Triarylmethane dyes have been identified as one of the toxic dyes. The presence of triarylmethane dyes in water act as pollutant and cause hazardous effect on natural resources, aquatic life as well as to human being. Triarylmethane dyes are extensively used for wool, silk, cotton, leather and paper industries. In the present work, natural sand  has been utilised as an adsorbent for developing methodology for the removal of  these dyes, which does not easily biodegrades in aqueous medium. The adsorption efficiency of natural sand was tested by using Victoria Blue (VB) as model dye. The adsorpion behaviour as a function of the pH of the aqueous dye solution, the contact time, initial concentration of the dye and the amount of adsorbent was studied. All studies were performed at room temperature (298 K).  It was  observed that under optimized conditions, 91% of VB can be removed from aqueous media.The adsorption data was fitted well by the Langmuir and Freundlich adsorption isotherm, pseudo-second-order and intraparticle diffusion models were also applied.

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DOI: http://dx.doi.org/10.17628/ecb.2014.3.752-759

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