Algerian Journal of Engineering Research
Volume 3, Numéro 1, Pages 7-14
2019-06-01
The Competitive Adsorption Of Basic Yellow 28 And Humic Acids (by28/ha) In Single And Binary Mixtures Onto Hydrophobic Modified Pillared Montmorillonite
Authors : Bouras Omar . Zermane Faiza . Cheknane Benamar .
Abstract
The ability of inorganic-organic pillared clays to adsorb basic yellow (BY28) and humic acids (HA) from wastewater was investigated at 20 °C. Adsorption rate data in single systems indicated that BY 28 was adsorbed more rapidly than HA. The pseudo-second-order kinetic model was found to correspond to the kinetic curves with regression coefficients greater than 0.99. The obtained results of the modeling of adsorption isotherms in single-component systems at the different considered pH using nonlinear regression showed that the best fit was obtained with the Freundlich isotherm (R2 > 0.96). In binary systems (BY28/HA), the adsorption at three molar ratio (r = BY28 / HA = 1/3, 1/1 and 3/1) showed that BY28 and HA solute retention rates were improved through a synergistic effect compared to those obtained in single-component single-solute systems. The Sheindorf-Rebhun-Sheintuch (SRS) model was used to predict isothermal data from binary systems using single-component data. The correlation between theoretical and experimental data had limited success due to the competitive and interactive effects between dye and humic acids.
Keywords
Clays, Humic acids, Basic yellow, Freundlich, Sheindorf-Rebhun-Sheintuch.
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