Efficiency evaluation of a natural material for removal of cationic oxazine and anionic azo dyes from aqueous solutions
The current work involves studying the adsorption process of brilliant cresyl blue (BCB) and methyl orange (MeO) dyes using local pumpkin seed husks (LPSH). The LPSH adsorbent was analysed by using Fourier transform infrared spectroscopy, scanning electron microscopy with energy dispersive...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Association of Chemical Engineers of Serbia
2025-01-01
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| Series: | Hemijska Industrija |
| Subjects: | |
| Online Access: | https://doiserbia.nb.rs/img/doi/0367-598X/2025/0367-598X2500006B.pdf |
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| Summary: | The current work involves studying the adsorption process of brilliant cresyl
blue (BCB) and methyl orange (MeO) dyes using local pumpkin seed husks
(LPSH). The LPSH adsorbent was analysed by using Fourier transform infrared
spectroscopy, scanning electron microscopy with energy dispersive x-ray
spectroscopy, X-ray diffraction and Brunauer-Emmett-Teller analyses. The
descriptive analysis of the morphology of LPSH revealed a heterogeneous
surface, while the structural analysis showed the presence of functional
groups typical of lignocellulosic structures and it was confirmed that the
mesoporous surface of the adsorbent had a specific surface area of ~1.53 m2
g-1. The adsorption isotherm studies suggested that the Langmuir model best
described the adsorption of MeO, while the Freundlich model is more suitable
for describing the adsorption of BCB. According to the thermodynamic
analyses, the adsorption of BCB was exothermic and spontaneous, whereas the
adsorption of MeO was endothermic and non-spontaneous. The results of
evaluating the efficiency of the LPSH adsorbent showed that the maximum
adsorption capacities are ~81 mg g-1 for the BCB dye and ~8.2 mg g-1 for the
MeO dye. |
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| ISSN: | 0367-598X 2217-7426 |