Nature Environment and Pollution Technology

P. Santhosh ¹, C. Dhandapani ²

Affiliations
1 Water Resources and Environmental Engineering, Karpagam University, Coimbatore-641 021, Tamil Nadu, IN
2 Anna University, Chennai-600 025, Tamil Nadu, IN

Abstract

In this study, Cr(VI) is removed from Wastewater using activated carbon derived from water hyacinth as an unconventional adsorbent. The aquatic plants commonly referred as aquatic weeds found in rivers, lakes and water logged areas pose a number of problems in water resource utilization. This work deals with one such weed "water hyacinth" which was selected to prepare activated carbon. The physical and chemical characteristics of the activated carbon prepared were determined. The study determines the parameters that influence adsorption process such as pH, initial metal ion concentration, contact time and adsorbent dosage. The suitability of Freundlich and Langmuir models was investigated for each chromium sorbent system. The Lagergren's constants were calculated for different initial concentrations of metal ions.

Keywords

Adsorption, Water Hyacinth, Activated Carbon, Chromium(VI), Wastewater.

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P. Santhosh ¹, A. Sridevi ², C. Dhandapani ³

Affiliations
1 Deptt. of Water Resources and Environmental Engineering, Karpagam University, Coimbatore-641 021, T. N., IN
2 Department of Chemistry, C. I .T Sandwich Polytechnic College, Coimbatore-641 014, T. N., IN
3 Anna University, Chennai-600 025, T. N., IN

Abstract

Activated carbon has been widely used as an adsorbent. Curcuma longa (Linn.) may be an alternative of activated carbon. In the present investigation the study on removal of dye Acid blue 25 using Curcuma longa waste activated carbon as an adsorbent following the down-flow column adsorption technique with a view to assess the stability of the chosen adsorbent for design purpose. Batch kinetic and isotherm studies were carried out at different conditions like contact time, Acid blue 25 concentration and bed height of the adsorbent. The Bohart-Adams and Thomas models were employed for the mathematical description of adsorption equilibrium, and finally it has been observed that the experimental data fitted more accurately to the Thomas model for both the cases.

Keywords

Acid Blue 25, Activated Carbon, Adsorption, Curcuma longa (Linn.).

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