Application of ANOVA to study the effect of factors on basic dye adsorption

Abstract

ANOVA one way used at this study to validate the experimental data of the effect of particle size, pH and temperature on the adsorption of methylene blue dye (MB) onto treated kenaf fibre char (H-KFC). The experimental data of the adsorption onto char of particle size of 500-1000 μm, the pH effect (at 100 ppm of initial dye concentration) and the temperature effect (30, 40 and 50 °C) was obtained from our previous study made by Mahmoud et al., (2012). At present work, further adsorption experiments were made on the adsorption onto H-KFC of different particle size (45 and 125-250 μm) and the pH effect (at different initial dye concentration). Based on the ANOVA statistical table, the value of F is lower than FCritical and the probability (P-value) is higher than 0.05, which indicate that the null hypothesis is accepted. Only one value was different at 50 ppm of the particle size effect, where the null hypothesis is rejected. That means there is no significant effect of particle size, pH and temperature at all initial dye concentrations; except the value at initial dye concentration of 50 ppm of the particle size effect