Activated Carbon 1 Adsorption Isotherms 1 Article 1 Coconut Shell 1 Decolourization 1 Microwave 1 POME 1 adsorption 1 carbon 1 chemical oxygen demand 1 coconut 1 coconut shell activated carbon contact time 1 effluent 1 elemental analysis 1 energy dispersive X ray spectroscopy 1 food color 1 food decolourisation 1 freundlich adsorption isotherm 1 langmuir adsorption isotherm 1 microwave irradiation 1 nonhuman 1 pH 1 palm oil 1 palm oil mill effluent 1 physical chemistry 1 physical parameters 1 scanning electron microscopy 1 spectrophotometry 1