COMPUTATIONAL CALCULATION OF ADSORPTION ISOTHERM CHARACTERISTICS OF CARBON MICROPARTICLES PREPARED FROM MANGO SEED WASTE TO SUPPORT SUSTAINABLE DEVELOPMENT GOALS (SDGS)

This study was conducted to evaluate the adsorption isotherms of carbon microparticles prepared from mango seed waste. Experiments were done by carrying process using several stages: (i) preparing and washing mango seed waste, ii) carbonization of the seeds at a temperature of 230 degrees C for 3 hours, and (iii) grinding of carbonized mango seeds using saw-milling. The batch-reactor technique was used to investigate the adsorption isotherm model using curcumin as the model of dye, in which the adsorption process was done under constant temperature, pressure, and pH conditions. The adsorption results were evaluated using 10 adsorption isotherm models (Langmuir, Temkin, Freundlich, Dubinin-Radushkevich, Hill-Deboer, Jovanovic, Fowler-Guggenheim, Harkin-Jura, Halsey, and Flory-Huggins). These results were in good agreement with some isotherm models, based on the correlation coefficient (R-2), namely Jovanovic (R-2=0.9379), Freundlich (R-2=0.7423), Halsey (R-2=0.7423), and Dubinin-Radushkevich (R-2 = 0.7187), informing that the phenomena during the adsorption were endothermic and spontaneous. The adsorption process interferes monolayer and multilayer formation under molecular-molecular cooperative phenomena. The interactions were confirmed to involve chemisorption and physisorption. This study shows the potential applications of mango seed waste as a sustainable adsorbent source for carbon microparticles and can support sustainable development goals (SDGs).