Glycidyl methacrylate macroporous copolymer grafted with diethylene triamine as sorbent for Reactive Black 5
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 ti...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Association of Chemical Engineers of Serbia
2014-01-01
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| Series: | Hemijska Industrija |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0367-598X/2014/0367-598X1400023S.pdf |
| Summary: | 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. [Projekat Ministarstva nauke
Republike Srbije, br. III 43009, br. TR 37021 i br. III 45001] |
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| ISSN: | 0367-598X 2217-7426 |