Abstract:
The present work is studied using agricultural waste sugarcane bagasse (SCB) for biosorption
of phenol and phenolic compounds from water and industrial effluent as well the synthetic
solutions of phenols used to develop the biosorption technique. The biosorption efficiency of
agricultural solid waste bagasse to adsorb phenolic compounds phenol, ortho-chlorophenol
(o-CPh), para-chlorophenol (p-CPh), and ortho, para-dichlorophenol (o,p-DCPh) from the
solution system and industrial effluents under batch equilibrium conditions was investigated.
The elemental ions of the biosorbent bagasse are identified by Fourier transform infrared
(FTIR) spectroscopy. The biosorption technique has been carried out using batch experiment
by the experimental parameters of biosorbent dose (0.5-5 g), contact time (upto 5 hrs), initial
concentration of sorbates (0.5 to 10.0 mg/L), particle size of biosorbent, pH of system
solutions (3 to 12) and operational temperature (30 to 50 ⁰C). The biosorption of phenolic
compounds is raised with raising the pH from 3.0 to optimal value and then dramatically
downize with raising the pH from that optimal value to avobe. The highest biosorption is
achieved at pH 6.5 for phenol, ortho-chlorophenol and para-chlorophenol and at pH 6.0 for
ortho, para-dichlorophenol. Biosorption equilibrium is established within 90 minutes for
phenol and o-CPh and 120 minutes for p-CPh, and o,p-DCPh. The biosorption experimental
data were employed to analyze in the isotherm and kinetic equations. The data found from
experiments were fitted well into the pseudo first order kinetic equation, with the correlated
coefficient (R
2
) greater than 0.99 in all cases respectively. The maximum monolayer
biosorption capacity of sugarcane bagasse for the selected phenolic compounds phenol, oCPh,
p-CPh
and
o,
p-DCPh
has
found
to
be
0.357,
0.361,
0.282
and
0.363
mg/g
respectively,
as
calculated
by
the
Langmuir
isotherm
equation
at
30⁰C.
The
biosorbed
compounds
could
be
recovered by desorption with the help of 1M alkaline solution (NaOH) in all cases. After
regenerations bagasse can be used as fuel purposes. The studies showed that the agricultural
waste bagasse has the promise for use as an effective adsorbent material for biosorption of
phenolic compounds from water and industrial effluents.
