TITLE:
Adsorption of Reactive Dyes on Activated Carbon Developed from Enteromorpha prolifera
AUTHORS:
Deshuai Sun, Zhongyi Zhang, Mengling Wang, Yude Wu
KEYWORDS:
Activated Carbon; Enteromorpha prolifera; Reactive Dye; Adsorption Isotherm; Adsorption Dynamics
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.4 No.7A,
July
2,
2013
ABSTRACT: Activated carbon was prepared from Enteromorpha prolifera by zinc chloride activation. The adsorption behaviors
of three reactive dyes (Reactive Red 23, Reactive Blue 171 and Reactive Blue 4)
onto this biomass activated carbon were investigated in batch systems. The
experimental findings showed that the removal efficiencies of three dyes onto
activated carbon were maximum
at the initial solution pH of 4.5 - 6.0. Thermodynamic studies suggested
that adsorption reaction was an endothermic and spontaneous process. Adsorption
isotherm of the three dyes obeyed Freundlich isotherm modal. Dye adsorption capacities of activated carbon were
59.88, 71.94 and 131.93 mg·g?1 for RR23, RB171 and RB4 at 27?C, respectively. Second-order
kinetic models fitted better to the equilibrium data of three dyes. The adsorption process on activated carbon
was mainly controlled by intraparticle diffusion mechanism.