Synthesis of Microporous Activated Carbon (MAC) Using Compressed Wood as Waste Biomass Via Pyrolysis for Adsorption of Crystal Violet

Abstract

Microporous activated carbon (MAC) was produced using compressed wood as
biomass residue by means of chemical activation by utilizing phosphoric acid as an
activation agent through pyrolysis in N2 atmosphere. The process was optimized by
conducting the experiments at various ranges of operating conditions including
impregnation ratio at 1:1 to 1:4 and pyrolysis temperatures of 500 to 900˚C. Furthermore,
MAC produced was employed for the adsorption of crystal violet. The adsorption efficiency
was analyzed by varying process parameters such as pH, agitation rate and agitation time.
From that, the highest adsorption efficiency of 73.2% was achieved. In addition, the
adsorption isotherm sexhibitedan incredible adsorption capacity of 311.34 mg/g that
shows great potential of MAC for environmental remediation. MAC was further
characterized to explore structural up gradation and qualitative key functional groups by
using field emission scanning electron microscopy (FESEM) and Fourier transform infrared
(FTIR). The kinetic study revealed the fitness of pseudo second order kinetic model for the
absorption of crystal violet dye. This study presents synthesis of cost effective synthesis of
MAC that is highly effective for the adsorption of crystal violet