The Studies of Carbonization Temperature and Amount of Phosphoric Acid on Phenol Adsorption on Activated Carbon Prepared from Apricot Stones

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Published: Dec 20, 2021
Keywords:
Apricot Stones Activated Carbon Adsorption Kinetic Phenol

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Nattapon Jansri
Department of Chemical Engineering, Faculty of Engineering, Thammasat University, Pathum Thani
Malee Santikunaporn
Department of Chemical Engineering, Faculty of Engineering, Thammasat University, Pathum Thani

Abstract

Activated carbon derived from apricot stones with phosphoric acid as a chemical agent was evaluated for the performance on phenol adsorption in a batch process at different pH and initial concentrations. In this work, two parameters, i.e. carbonization temperatures (400, 500 and 600°C) and apricot stones to phosphoric acid ratios (1 : 1.0, 1 : 1.5 and 1 : 2.0) were considered. The results showed that the carbonization temperature and the ratio of apricot stones to phosphoric acid were predominant on the properties of activated carbon prepared. Activated carbons carbonized at 500°C gave high iodine number, methylene blue adsorption, and phenol removal efficiency, especially AC500,2.0 whereas activated carbons carbonized at 600°C gave the lowest iodine number and methylene blue adsorption for all ratios. For the phenol adsorption study, the adsorption was explained very well by a pseudo-second-order kinetic model with R2 of 0.99 and the equilibrium adsorption data were fitted to the Langmuir isotherm except AC600,2.0.

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Vol. 32 No. 1 (2022): January-March, 2022
Section
Engineering Research Articles

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