This study aims to evaluate the adsorption isotherm of carbon microparticles prepared from pumpkin (Cucurbita maxima) seeds for adsorbing curcumin (as a model dye). The results were derived and compared using kinetics approach based on several standard models, namely Langmuir, Temkin, Freundlich, Dubinin-Radushkevich models. second aim is effects particle size (from 100 1000 mm) characteristics...