Effect of Halide Ions on the Adsorption Prewave of Methylene Blue

Abstract

In the present study, the familiar Langmuir adsorption isotherm is applied to the mixed adsorption of methylene blue in the presence of halide ion. The variation of methylene blue prewave height or AC peak height with halide ion concentration is treated statistically. It is concluded that the decrease in the DC prewave or in the corresponding AC peak height is caused by the mixed adsorption of halide ion. The relative temperature coefficient of AC perk height was found to be 1.04% deg^-1 at 25°C in 0.4M KNO₃ with acetate buffer solution (pH 4.7).