Optimization of chitosan/polyvinyl alcohol/lemongrass hydrochar composite beads for the removal of azo dyes in water
This study explores the potential of chitosan (CS)/polyvinyl alcohol (PVA)/lemongrass hydrochar (LGHC) composite beads as efficient adsorbents for azo dye removal for the first time, demonstrating their high efficacy and sustainability. Unlike conventional adsorbents, these composite beads incorpora...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Next Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S294982282500139X |
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| author | Patricia Anne P. Correa Sean Francis O. Buenaventura Justine Rae S. Santos Edgar Clyde R. Lopez |
| author_facet | Patricia Anne P. Correa Sean Francis O. Buenaventura Justine Rae S. Santos Edgar Clyde R. Lopez |
| author_sort | Patricia Anne P. Correa |
| collection | DOAJ |
| description | This study explores the potential of chitosan (CS)/polyvinyl alcohol (PVA)/lemongrass hydrochar (LGHC) composite beads as efficient adsorbents for azo dye removal for the first time, demonstrating their high efficacy and sustainability. Unlike conventional adsorbents, these composite beads incorporate LGHC, a low-cost, renewable biomass-derived material, and sustainable polymers (CS and PVA), offering an eco-friendly and cost-effective alternative for industrial dye removal. The optimal composition of the composite beads was determined to be 2.00 wt% CS, 862.70 ppm LGHC, and 0.50 wt% PVA, achieving impressive sorption capacities of 22.30 mg/g for methyl orange, 57.73 mg/g for congo red, and 74.20 mg/g for methyl red. The composite beads featured a porous structure, and a composition enriched with carbon, oxygen, and nitrogen, facilitating dye removal through electrostatic interactions, hydrogen bonding, and π-π stacking. While their sorption capacities are comparable to conventional adsorbents, the incorporation of biomass-derived hydrochar and sustainable polymers enhances their environmental viability. This study underscores the potential of CS/PVA/LGHC composite beads as a scalable, eco-friendly solution for mitigating industrial dye pollution, contributing to cleaner water systems and greater environmental sustainability. |
| format | Article |
| id | doaj-art-7de42833861c4820bb4c503c8bd4cdf9 |
| institution | DOAJ |
| issn | 2949-8228 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Next Materials |
| spelling | doaj-art-7de42833861c4820bb4c503c8bd4cdf92025-08-20T02:48:22ZengElsevierNext Materials2949-82282025-07-01810062110.1016/j.nxmate.2025.100621Optimization of chitosan/polyvinyl alcohol/lemongrass hydrochar composite beads for the removal of azo dyes in waterPatricia Anne P. Correa0Sean Francis O. Buenaventura1Justine Rae S. Santos2Edgar Clyde R. Lopez3Department of Chemical Engineering, University of Santo Tomas, España, Manila 1015, PhilippinesDepartment of Chemical Engineering, University of Santo Tomas, España, Manila 1015, PhilippinesDepartment of Chemical Engineering, University of Santo Tomas, España, Manila 1015, PhilippinesCorresponding author.; Department of Chemical Engineering, University of Santo Tomas, España, Manila 1015, PhilippinesThis study explores the potential of chitosan (CS)/polyvinyl alcohol (PVA)/lemongrass hydrochar (LGHC) composite beads as efficient adsorbents for azo dye removal for the first time, demonstrating their high efficacy and sustainability. Unlike conventional adsorbents, these composite beads incorporate LGHC, a low-cost, renewable biomass-derived material, and sustainable polymers (CS and PVA), offering an eco-friendly and cost-effective alternative for industrial dye removal. The optimal composition of the composite beads was determined to be 2.00 wt% CS, 862.70 ppm LGHC, and 0.50 wt% PVA, achieving impressive sorption capacities of 22.30 mg/g for methyl orange, 57.73 mg/g for congo red, and 74.20 mg/g for methyl red. The composite beads featured a porous structure, and a composition enriched with carbon, oxygen, and nitrogen, facilitating dye removal through electrostatic interactions, hydrogen bonding, and π-π stacking. While their sorption capacities are comparable to conventional adsorbents, the incorporation of biomass-derived hydrochar and sustainable polymers enhances their environmental viability. This study underscores the potential of CS/PVA/LGHC composite beads as a scalable, eco-friendly solution for mitigating industrial dye pollution, contributing to cleaner water systems and greater environmental sustainability.http://www.sciencedirect.com/science/article/pii/S294982282500139XAzo dyesAdsorptionLemongrass hydrocharChitosanPolyvinyl alcoholCentral composite design |
| spellingShingle | Patricia Anne P. Correa Sean Francis O. Buenaventura Justine Rae S. Santos Edgar Clyde R. Lopez Optimization of chitosan/polyvinyl alcohol/lemongrass hydrochar composite beads for the removal of azo dyes in water Next Materials Azo dyes Adsorption Lemongrass hydrochar Chitosan Polyvinyl alcohol Central composite design |
| title | Optimization of chitosan/polyvinyl alcohol/lemongrass hydrochar composite beads for the removal of azo dyes in water |
| title_full | Optimization of chitosan/polyvinyl alcohol/lemongrass hydrochar composite beads for the removal of azo dyes in water |
| title_fullStr | Optimization of chitosan/polyvinyl alcohol/lemongrass hydrochar composite beads for the removal of azo dyes in water |
| title_full_unstemmed | Optimization of chitosan/polyvinyl alcohol/lemongrass hydrochar composite beads for the removal of azo dyes in water |
| title_short | Optimization of chitosan/polyvinyl alcohol/lemongrass hydrochar composite beads for the removal of azo dyes in water |
| title_sort | optimization of chitosan polyvinyl alcohol lemongrass hydrochar composite beads for the removal of azo dyes in water |
| topic | Azo dyes Adsorption Lemongrass hydrochar Chitosan Polyvinyl alcohol Central composite design |
| url | http://www.sciencedirect.com/science/article/pii/S294982282500139X |
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