Hemijska industrija 2014 Volume 68, Issue 6, Pages: 685-699
https://doi.org/10.2298/HEMIND140127023S
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Glycidyl methacrylate macroporous copolymer grafted with diethylene triamine as sorbent for Reactive Black 5
Sandić Zvjezdana P. (University of Banja Luka, Faculty of Science, Banja Luka, Republic of Srpska, Bosnia and Herzegovina)
Žunić Marija J. (ICTM-Department of Catalysis and Chemical Engineering, Belgrade)
Maksin Danijela D. (Vinča Institute of Nuclear Sciences, Department of Chemical Dynamics and Permanent Education, Belgrade)
Milutinović-Nikolić Aleksandra D. (ICTM-Department of Catalysis and Chemical Engineering, Belgrade)
Popović Aleksandar R. (Faculty of Chemistry, Belgrade)
Jovanović Dušan M. (ICTM-Department of Catalysis and Chemical Engineering, Belgrade)
Nastasović Aleksandra B. (ICTM, Department of Chemistry, Belgrade)
In this paper, macroporous glycidyl methacrylate and ethylene glycol
dimethacrylate copolymer functionalized with diethylene triamine [PGME-deta],
was evaluated as Reactive Black 5 (RB5) sorbent. Batch RB5 removal from
aqueous solution by PGME-deta was investigated by varying pH, contact time,
sorbent dosage, initial dye concentration and temperature. The sorption is pH
sensitive having maximum at pH 2 (dye removal of 85%), decreasing with the
increase of pH (dye removal of 24% at pH=11) after 60 min. Sorption kinetics
was fitted to chemical-reaction and particle-diffusion models
(pseudo-first-order, pseudo-second-order, intraparticle diffusion and Mckay
models). The pseudo-second-order kinetic model accurately predicted the RB5
amount sorbed under all investigated operating conditions, while the
intraparticle diffusion was the dominant rate-limiting mechanism. The
diffusion mechanism was more prevalent with the decrease in temperature and
the increase in concentration. The isotherm data was best fitted with the
Langmuir model, indicating homogeneous distribution of active sites on
PGME-deta and monolayer sorption, with the maximum sorption capacity of 353
mg g-1. The calculated sorption rates improved with increasing temperature
and an activation energy close to 40 kJ mol-1 was determined, suggesting that
chemisorption was also rate-controlling.
Keywords: Reactive Black 5, Macroporous crosslinked copolymer, Diethylene triamine, Kinetic modeling, Equilibrium study
Projekat Ministarstva nauke
Republike Srbije, br. III 43009, br. TR 37021 i br. III 45001