Synthesis of microwave assisted mangoes peel based activated carbon for methylene blue dye removal : equilibrium, kinetic and mechanism studies
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Date
2019-05
Authors
Nurul Abiha Binti Mohd Alwi
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Abstract
There many industries that uses dye to be one their substance in generating their
desired product. Those substances identified as toxic and carcinogenic making it one of
the pollutants to water bodies. The aim of this research is to study the performance of
mangoes peel based activated carbon (MPAC) to remove methylene blue (MB) dye using
physical activation, CO2 under microwave heating. Optimum preparation conditions of
MPAC were observed at 440 W for 2.17 minutes of activation time, resulted in 84.72%
removal of MB dyes. The Bruneaur-Emmet-Teller (BET) surface area, mesopore surface
area and fixed carbon content of MPAC are 282.44 m2/g, 175.60 m2/g and 70.68%
respectively. The pore diameter of MPAC was discovered to be mesopore at 2.54nm.
Adsorption equilibrium of MB on MPAC followed Langmuir isotherm with monolayer
adsorption capacity of 196.08 mg/g. Pseudo-second order was found fit for adsorption
kinetic data. The rate limiting step for MPAC adsorption is intraparticle diffusion.