Investigation of adsorption of Basic Orange 2 dye on montmorillonite and error analysis

Abstract

ABSTRACT. In this study, isotherm studies were investigated for the removal of basic orange 2 (BO2) dye on the montmorillonite surface. Two-parameter isotherm models such as Langmir, Freundlich, and Temkin isotherms and Three-parameter isotherm models such as Sips, Toth, and Khan isotherms were calculated by non-linear analysis method. The adsorption capacity at equilibrium was calculated by adding 0.035 g of adsorbent at 10-300 mg/L concentrations to 100 mL of synthetic dyestuff solution at room temperature. According to the results obtained, it was determined that the isotherm data matched the Langmuir isotherm with a regression coefficient of 0.995 from the Two-parameter models, and the Sips isotherm with a regression coefficient of 0.998 from the Three-parameter isotherm models. In addition, according to the results of error analysis, it was determined that the lowest error value fit the HYBRID model. SNE values support the HYBRID model.   KEY WORDS: Adsorption, Basic orange 2, Isotherm models; Error analyses, Hybrid Bull. Chem. Soc. Ethiop. 2023, 37(1), 47-58.                                                                DOI: https://dx.doi.org/10.4314/bcse.v37i1.5