Coconut Husk Based Activated Carbon Produced Via Sodium Bicarbonate Activation For Chloramphenicol Removal From Aqueous Solution
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Date
2022-07-01
Authors
Ismail, Halimatusaadiah
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
The presented research studied on the removal of chloramphenicol (CAP) from aqueous solution by coconut husk based activated carbon (CHAC). The CHAC yield was significantly affected by activation temperature whilst CAP adsorption performance was greatly influenced by NaHCO3 impregnation ratio (IR), activation temperature and activation time. Analysis by response surface methodology revealed the optimum preparation conditions for activation temperature, activation time and IR were found to be 500 ℃, 1 hour and 0.5, respectively. The optimized CHAC was found to be homogeneous and posed mesoporous type of pores with BET surface area of 438.2 m2/g. In batch adsorption study, the CAP uptakes onto CHAC increased as both CAP initial concentration and contact time increased. For effect of solution pH, the highest CAP removal was found at pH 2.and the lowest at pH 13. The best models for CAP adsorption system were Langmuir isotherm and pseudo-first-order kinetic. The adsorption process was governed by film-diffusion mechanism. Thermodynamic study revealed the CAP adsorption onto CHAC was exothermic and spontaneous in nature.