This paper presents the use of
formaldehyde-modified peanut shells as bioadsorbent for the adsorption of
methylene blue for the first time. Firstly, the effect of medium pH, which is
one of the important parameters for adsorption process, was determined. Then,
the adsorption process conditions such as adsorption time (30-150 min), initial
concentration (50-200 ppm) and ambient temperature (25-40°C) were optimized by
using response surface methodology (RSM) based on Box-Behnken experimental
design. The pseudo-first
order and pseudo-second order kinetic models were used to evaluate the
adsorption kinetic in this study under optimized process conditions. The maximum adsorption
capacity was found under optimum process conditions; 92.25 min adsorption time,
191.87 ppm initial concentration, 39.70°C adsorption temperature. The maximum
adsorption capacity for methylene blue was determined to be 43.84 mg/g using RSM
based on Box-Behnken experimental design. Adsorption kinetic results showed
that the plots of the pseudo-second order kinetic model were fit the
experimental data better when compared to the pseudo-first order model. In
addition, results indicated that formadehite-modified peanut shells could be
used as low cost and effective bioadsorbent for the adsorption of methylene
blue, which is one of the important dyes.
Furthermore, it was concluded that
the RSM based on Box-Behnken experimental design can be applied successfully
for the methylene adsorption process.
Response surface methodology Box-Behnken experimental design Bioadsorbent Methylene blue adsorption
Primary Language | English |
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Subjects | Chemical Engineering |
Journal Section | Research Article |
Authors | |
Publication Date | June 1, 2020 |
Published in Issue | Year 2020 Volume: 10 Issue: 1 |
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