Thermodynamic, Kinetics, and Adsorption Mechanism Studies of Methyl Orange by Surfactant-Modified Activated Carbon

The application of inexpensive, readily accessible, highly effective, and environmentally favorable adsorbents has been examined as a perfect substitute for the currently expensive ways of extracting colours from wastewater. This survey explores the development of activated carbon (AC) adsorbent modified by using four surfactants, Sodium lauryl ether sulphate (SLES), Sodium alpha olefin sulphonate (AOS), Alkylbenzyldimethylammonium chloride (BAC) and Cetyltrimethylammonium chloride (CTAC), for extracting the model anionic dye methyl orange (MO) from an aqueous solution. The naturalistic and modified activated carbon (ACBAC and ACCTAC) samples were defined by SEM and FT-IR analysis. MO was extracted from its aqueous solutions by adsorption tests with ACBAC and ACCTAC. It has been studied how the pH of the solution, starting dye concentration, and the duration of the contact time affect the adsorption capacity. The adsorption sequence on the ACBAC and ACCTAC can be precisely expressed with Temkin when compared to the Langmuir and Freundlich isotherm models, according to the analysis of the adsorption findings obtained at room temperature. The characteristic components of each adsorption isotherm were also identified. It was found that the pseudo-first-order kinetic model explained the adsorption kinetics. Methyl orange anionic dye can be removed from wastewater at a reasonable cost by using modified activated carbon and cationic surfactants (BAC and CTAC).