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Adsorption of an emerging contaminant (primidone) onto activated carbon: kinetic, equilibrium, thermodynamic, and optimization studies

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Title Adsorption of an emerging contaminant (primidone)
onto activated carbon: kinetic, equilibrium,
thermodynamic, and optimization studies
 
Creator Appa, Roshan
Mhaisalkar, Vasant A.
Naoghare, Pravin K.
Lataye, Dilip H.
 
Subject Biochemistry
 
Description The current study addresses the removal of an
emerging environmental contaminant (primidone) in
batch adsorption experiments using commercial-grade
powdered activated charcoal (PAC). The experiments
for the removal of primidone were performed to identify
the effect of various adsorption parameters. The secondorder
rate expression best represented the adsorption
kinetics data. The Freundlich isotherm equation was
best fitted to the experimental adsorption data at equilibriumfor
removal of primidone using PAC. The values
for change in entropy (ΔSo) were positive, which indicates
that the degree of freedomof the process increases.
The negative values of change in enthalpy (ΔHo) and
change in Gibb’s free energy (ΔGo) indicate that the
physical adsorption is a dominant phenomenon, and the
process is feasible and spontaneous. The negative value
of ΔHo also represented the exothermicity of the adsorption
process. The Taguchi optimization technique
calculated the influence of variation of different process
parameters, viz., initial pH (pH0), PAC dosage (m),
initial adsorbate concentration (C0), solution temperature
(T), and process contact time (t), on the removal of
primidone by adsorption from aqueous solution. Each of
the above parameters was examined at three levels to
study their effects on the adsorptive uptake of primidone
using PAC (qe, mg g−1), and the optimum value necessary
to maximize qe was determined. The findings from
the ANOVA indicate that the PAC dose (m) is the most
notable parameter contributing 62.16% to qe and a
71.96% to the signal to noise (S/N) ratio data, respectively.
The confirmation experiments performed at the
optimum parameter condition validated the applicability
of the Taguchi design of experiments. The percent removal
and adsorptive uptake at the optimal condition
were 86.11% and 0.258 mg g−1, respectively.
 
Publisher Springer
 
Date 2019
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/1208/1/Appa2019_Article_AdsorptionOfAnEmergingContamin.pdf
Appa, Roshan and Mhaisalkar, Vasant A. and Naoghare, Pravin K. and Lataye, Dilip H. (2019) Adsorption of an emerging contaminant (primidone) onto activated carbon: kinetic, equilibrium, thermodynamic, and optimization studies. Environmental Monitoring and Assessment, 191 (215). ISSN 0167-6369, ESSN: 1573-2959
 
Relation https://link.springer.com/journal/10661
http://neeri.csircentral.net/1208/