Removal of Golden Yellow 28 Dye from Aqueous Solution Using Thermo-Chemical Modified Peanut Shell Activated Charcoal
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Date
2018-03
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
AAU
Abstract
In this study, modified activated carbon from agro by-product (peanut shell) has been successfully
produced
through
chemical
activation
process
using
sodium
hydroxide
(NaOH)
as
an
activating
agent and also the effect of activation agent and carbonization temperatures on adsorption
efficiency, surface characteristics and yield were studied. To produce modified activated carbon,
samples were heated to the final carbonization temperatures 400, 500 and 600
X | ashenaf i B, 2018G.C
o
C respectively under
a
continuous
pure
nitrogen
flow
(99.6%)
and
at
a
heating
rate
of
10
o
C/min with an activation
time150min. The physicochemical properties of the raw peanut shell and sodium hydroxide
modified peanut shell based activated carbon were characterized by BET, FT-IR, XRD, pH
PZC
and proximate analysis. The adsorption efficiency tests were performed in the batch adsorption
system at different initial concentrations of GY 28 dye 30-150 ppm, contact time 10-90 min, and
solution pH 2-10 with 100ml volume of solution at constant solution temperature 25+5°C and
150rpm with 0.5gm of base modified activated carbon @500
o
C. This modified adsorbent (BM5)
removes 83.3% and 25 mg/gm of the GY 28 dye from aqueous solution at optimal pH of 10 and
60 min with fixed amount of adsorbent, 0.5gm. The equilibrium data was analyzed by Freundlich
and Langmuir isotherm models. Finally, the rate of the adsorption process was investigated using
Pseudo first and Pseudo second order kinetic models. Pseudo second-order kinetic model was
found to be well fitted to the data obtained. Based on the Golden Yellow 28 dye removal efficiency
test, the activated carbon produce from raw peanut shell by thermo-chemical activation
method can be used as one of the alternative adsorbent in dye wastewater treatment.
Description
Keywords
thermo-chemical, Aqueous Solution, Peanut Shell