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Uptake of permanganate from aqueous environment by surfactant modified montmorillonite batch and fixed bed studies

Mahadevaiah, N and Vijayakumar, B and Hemalatha, K and Prakash, Jai BS (2011) Uptake of permanganate from aqueous environment by surfactant modified montmorillonite batch and fixed bed studies. In: BULLETIN OF MATERIALS SCIENCE, 34 (7). pp. 1675-1681.

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Abstract

Organo-clay was prepared by incorporating different amounts (in terms of CEC, ranging from 134-840 mg of quaternary ammonium cation (QACs) such as hexadecytrimethylammonium bromide (C19H42N]Br) into the montmorillonite clay. Prepared organo-clays are characterized by CHN analyser and XRD to measure the amount of elemental content and interlayer spacing of surfactant modified clay. The batch experiments of sorption of permanganate from aqueous media by organo-clays was studied at different acidic strengths (pH 1-7). The experimental results show that the rate and amount of adsorption of permanganate was higher at lower pH compared to raw montmorillonite. Laboratory fixed bed experiments were conducted to evaluate the breakthrough time and nature of breakthrough curves. The shape of the breakthrough curves shows that the initial cationic surfactant loadings at 1.0 CEC of the clay is enough to enter the permanganate ions in to the interlamellar region of the surfactant modified smectile clays. These fixed bed studies were also applied to quantify the effect of bed-depth and breakthrough time during the uptake of permanganate. Calculation of thermodynamic parameters shows that the sorption of permanganate is spontaneous and follows the first order kinetics.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the Indian Academy of Sciences
Keywords: Organo-clays;permanganate adsorption;surfactants; breakthrough curve;breakthrough time;column studies
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 22 Jun 2012 10:49
Last Modified: 22 Jun 2012 10:49
URI: http://eprints.iisc.ernet.in/id/eprint/44724

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