Journal of Chemistry

Isotherm studies for adsorption of Cr (VI) using activated carbon

Author:
RAJESH GOPINATH1 and NANDINI VENUGOPAL2
Affiliation:

1Assistant Professor, Department of Civil engineering A.I.T. Bangalore India

2Subject Matter Expert ,Pearson Education Services Pvt Ltd Bangalore India

Keyword:
Issue Date:
December 2012
Abstract:

In the present study, efficiency of commercially obtained Powdered Activated Carbon as adsorbent in the removal of Cr(VI) ions was investigated under controlled laboratory Batch conditions. The experiments were carried out for kinetic studies on the removal efficiency by monitoring for variation with contact time, pH and strength of adsorbent-adsorbate. The removal efficiency was found to increase from 27.50 to 99.38%, with increase in the activated carbon dosage from 1 to 30gm/l. It however shared an inverse relationship with initial chromium (VI) concentration and pH, with the optimum being 2. Adsorption isotherm studies revealed that the Langmuir and Freundlich models confirmed well with the removal process, while Dubinin-Radushkevich (D-R) did not fit the equilibrium data. The plot of log qe versus log Ce, unraveled
value of ‘n’ value to be 9.81, thereby indicating good adsorption. The removal process followed mono-layer adsorption, under the influence of Vander-Waals forces. The overall study indicated adsorption by activated carbon as an alternative and reliable technique in efficient hexavalent chromium removal.

Pages:
333-340
ISSN:
2319-8036 (Online) - 0973-3450 (Print)
Source:
DOI:
juc

Copy the following to cite this article:

RAJESH GOPINATH1 and NANDINI VENUGOPAL2, "Isotherm studies for adsorption of Cr (VI) using activated carbon", Journal of Ultra Chemistry, Volume 8, Issue 3, Page Number 333-340, 2016

Copy the following to cite this URL:

RAJESH GOPINATH1 and NANDINI VENUGOPAL2, "Isotherm studies for adsorption of Cr (VI) using activated carbon", Journal of Ultra Chemistry, Volume 8, Issue 3, Page Number 333-340, 2016

Available from: http://www.journalofchemistry.org/paper/427/

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