adsorption isotherm and kinetics study: removal of phenol using adsorption onto modified pistacia mutica shells

Background and purpose: phenol is an aromatic hydrocarbon and one of the banzan derivatives which has a higher dissolution rate in water. therefore, it must be removed for water pollution prevention. the aim of this study was to investigate the possibility of pistaciamuticabio mass as an alternative adsorbent for phenol removal from aqueous solution. materials and methods: the effect of various parameters including contact time (10-102 min), ph(2-8), adsorbent dosage (0.4-1.5g/l), phenol concentration (50-150mg/l) were investigated in this experimental-lab study. also, the isotherm and kinetic investigations were performed for phenol adsorption process. the adsorption equilibriums were analyzed by langmuir, temkin, freundlich and harkins jura isotherm models. results: it was found that the data fitted to langmuir (r²=0.98) better than other isotherm models. batch kinetic experiments showed that the adsorption followed pseudo second-order kinetic model with correlation coefficients greater than 0.998. conclusion: it was revealed that p. mutica was not only an inexpensive absorbent, but also a quite effective factor in removal of phenol from water and wastewater.