Adsorption Thermodynamics of Emulsified Oil on Modified Calcium Alginate Hydrogels
Calcium alginate beads modified with maleic anhydride were used for the removal of emulsified oil from water.
Modified alginate showed higher adsorption capacity than native alginate. Thermodynamic properties were calculated using
Khan and Singh method. The oil adsorption onto modified alginate found to have a complex mechanism involving
intraparticle diffusion and a multilayer physisorption. Oil adsorption was exothermic and spontaneous.
Keywords: Thermodynamics, Crude oil, Alginate, Maleic Anhydride, Esterification.