Muralidharan, B. and Alwarappan, S. and Vasudevan, T. and Iyer, S.V. (1998) Adsorption of C.I Direct brown 2: A bisazo dye from different base electrolytes. Bulletin of Electrochemistry, 14 (6-7). pp. 231-234.

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ElectrocapiJlary curves for 1 M solutions of NaCl, aNO) and . a2S04 in the presence of different concentrations of C.I. Direct Brown 2 show that the organic compound adsorbs on the positively cbarged mercury surface. The extent of adsorption from these base electrolytes follows the order Na2S04 > NaNO) > NaC!. Thermodynamic parameters like-eharge on the metal surface (qil'\ the surface excess of organic molecule adsorbed (rorg)' surface coverage (8) and free energy of adsorption (-tJ.Go) are evaluated. The adsorption of this compound is found to obey Langmuir's adsorption isotherm in all the cases, irrespective of the nature of the base electrolyte used.

Item Type: Article
Uncontrolled Keywords: Adsorption isotherm; electrocapillary
Subjects: Electrodics and Electrocatalysis
Depositing User: ttbdar CECRI
Date Deposited: 20 Feb 2012 05:47
Last Modified: 20 Feb 2012 05:47

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