Studies on Adsorption of Methyl Violet on Alumina, Silica and Zinc Oxide

Department of Chemistry, Islamia University, Bahawalpur, Pakistan

Manuscript received 14 January 1986, revised 8 October 1986, accepted 22 January 1987

The adsorption or methyl violet from aqueous and alcoholic solutions over alumina, silica and zinc oxide have been carried out to understand the extent and mode or adsorption. The adsorption or methyl violet over these oxides exhibited either a typical H-type or L-type adsorption isotherm. The H-type adsorptiun is explained on the basis or 'flatwise' adsorption with some micellisation, whereas the L-type adsorption is interpreted in terms or multilayer adsorption. The Frendlich and the Langmuir equations are applicable within the limited range or dye concentration.