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13.
Kinetics and Equilibrium Studies of Methylene Blue Removal from
Aqueous Solution by Adsorption on Treated Sawdust
1Olugbenga
Solomon Bello*, 1Misbaudeen Abdul Hameed, 1Olalekan
Abdul Muiz Popoola
*1Department of Chemistry, P.M.B 4000, LAUTECH, Ogbomoso, Oyo State,
Nigeria
Corresponding author: +2348035685435, E-mail address:
osbello@yahoo.com.
Abstract:
The
aim of this study is to use treated sawdust as adsorbent for the
removal of methylene blue dye. The adsorption equilibrium and
kinetics of methylene blue dye on this adsorbent were then
examined at 25 0C. Adsorption isotherm of the
methylene blue (MB) on the treated adsorbent was determined and
correlated with common isotherm equations. The sorption data was
then correlated with Langmuir and Freundlich adsorption isotherm
models. The kinetics of methylene blue adsorption on the treated
adsorbent has also been studied by fitting the data in Lagergren’
s first order, Ho-McKay’ s pseudo second order, Elovich and
Intraparticulate kinetic models. It was observed that the
removal of methylene blue over the treated adsorbent undergoes
second order processes and at all the concentration of the dye.
The kinetic parameters of this best-fit model were calculated
and discussed.
Keywords:
Saw-dust, adsorbent, dye, kinetic models,
adsorption ýsotherm.
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