Sorption of Cu(II) Ions on Chitosan-Zeolite X Composites: Impact of Gelling and Drying Conditions
Abstract
:1. Introduction
2. Results and Discussion
2.1. Synthesis and Characterization of Chitosan and Chitosan-Zeolite Composites
Sample | Zeolite/Chitosan Mass Ratio | Cell Parameter (nm) | Zeolite X | Crystallite Size (nm) | |
---|---|---|---|---|---|
Synthesis | Composite | Si/Al | |||
Zeolite X | 2.497 | 1.29 | 95 | ||
Composite A | 0.3 | 0.27 | 2.497 | 1.30 | 25 |
Composite B | 1.0 | 0.94 | 2.498 | 1.27 | 38 |
Composite C | 1.5 | 1.45 | 2.500 | 1.24 | 35 |
Sample | Zeolite Mass Fraction | Surface Area (m2·g−1) | Micropore Volume (cm3·g−1) | Mesopore Volume (cm3·g−1) |
---|---|---|---|---|
Chitosan aerogel | 0 | 230 | 0 | 0.63 |
Composite A aerogel | 0.21 | 390 | 0 | 0.89 |
Composite B aerogel | 0.48 | 360 | 0.04 | 0.63 |
Composite C aerogel | 0.59 | 480 | 0.11 | 0.44 |
Zeolite X | 1 | 450 | 0.18 | 0.01 |
Chitosan xerogel | 0 | 4 | 0 | 0.004 |
Composite B xerogel | 0.48 | 1 | 0 | 0.002 |
Composite C xerogel | 0.59 | 4 | 0 | 0.006 |
2.2. Adsorption of Copper
2.2.1. Copper Sorption on Chitosan Gels
Sample | Zeolite Mass Fraction | Hydrogel | Aerogel | Xerogel | |||
---|---|---|---|---|---|---|---|
Qmax (mg·g−1) | K (L·mg−1) | Qmax (mg·g−1) | K (L·mg−1) | Qmax (mg·g−1) | K (L·mg−1) | ||
Chitosan | 1 | 190% ± 10% | 0.021% ± 18% | 139% ± 9% | 0.016% ± 16% | 24% ± 23% | 0.07% ± 72% |
Composite A | 0.21 | 155% ± 10% | 0.083% ± 30% | 168% ± 18% | 0.025% ± 33% | 9.4% ± 14% | 0.29% ± 63% |
Composite B | 0.48 | 111% ± 16% | 0.15% ± 62% | 113% ± 14% | 0.040% ± 34% | 12.7% ± 9% | 0.38% ± 72% |
Composite C | 0.59 | 83% ± 9% | 0.28% ± 50% | 110% ± 13% | 0.065% ± 38% | 15.6% ± 10% | 3.5% ± 100% |
2.2.2. Sorption of Cu2+ on Zeolite Na-X
2.2.3. Sorption Isotherms of Cu2+ on Composites Chitosan-Zeolite X
3. Experimental Section
3.1. Materials
3.2. Preparation of Chitosan Beads
3.3. Preparation of Chitosan-Zeolite Composites
3.4. Characterization of Materials
3.5. Copper Sorption Studies
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Djelad, A.; Morsli, A.; Robitzer, M.; Bengueddach, A.; Di Renzo, F.; Quignard, F. Sorption of Cu(II) Ions on Chitosan-Zeolite X Composites: Impact of Gelling and Drying Conditions. Molecules 2016, 21, 109. https://doi.org/10.3390/molecules21010109
Djelad A, Morsli A, Robitzer M, Bengueddach A, Di Renzo F, Quignard F. Sorption of Cu(II) Ions on Chitosan-Zeolite X Composites: Impact of Gelling and Drying Conditions. Molecules. 2016; 21(1):109. https://doi.org/10.3390/molecules21010109
Chicago/Turabian StyleDjelad, Amal, Amine Morsli, Mike Robitzer, Abdelkader Bengueddach, Francesco Di Renzo, and Françoise Quignard. 2016. "Sorption of Cu(II) Ions on Chitosan-Zeolite X Composites: Impact of Gelling and Drying Conditions" Molecules 21, no. 1: 109. https://doi.org/10.3390/molecules21010109