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In this study, removal of a cationic dye methylene blue by filter coffee grounds as a potential waste was investigated. Systematically, the effect of initial dye concentration, pH and contact time on the adsorption efficiency were determined. Isotherm and kinetic models were studied. Langmuir and Freundlich model were calculated for adsorption of methylene blue. Langmuir model is better fit than Freundlich model (R2=0.9892). The maximum adsorption capacity of filter coffee waste were 312.515 mg/g. Scanning electron microscope (SEM) images were used to record the surface characteristics and morphological features of filter coffee waste. This study emphases that filter coffee waste can effectively remove methylene blue from aqueous solution.

FAST ADSORPTION OF METHYLENE BLUE BY FILTER COFFEE WASTE