Novel Fluorescent Nanocellulose Hydrogel Based on Nanocellulose and Carbon Dots for Detection and Removal of Heavy Metal Ions in Water
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Preparation of Nanocellulose
2.3. Synthesis of Carboxylated Nanocellulose (CNC)
2.4. Preparation of CDs
2.5. Preparation of Carboxylated Nanocellulose Modified with Carbon Dots (CNC-CDs)
2.6. Preparation of Fluorescent Nanocellulose Hydrogel (FNH)
2.7. Physicochemical Characterization
2.8. Adsorption Studies
3. Results and Discussion
3.1. Physicochemical Characterization
3.1.1. FTIR
3.1.2. SEM
3.1.3. Spectral Features
3.2. Appearance and Fluorescence Behavior of FNH
3.3. Effect of Experimental Parameters on Fe3+ and Pb2+ Adsorption Capacity
3.3.1. Effect of Contact Time
3.3.2. Effect of pH
3.3.3. Effect of Adsorbent Dosage
3.3.4. Adsorption Isotherm
3.4. Fluorescence Sensing of Fe3+
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Temperature | R2 | qcal,mas (mg/g) | qexp,max (mg/g) | KL (L/mg) | |
---|---|---|---|---|---|
288 K a | Fe3+ | 0.9981 | 86.66 | 87.50 | 0.0377 |
298 K | 0.9975 | 90.24 | 90.25 | 0.0446 | |
308 K | 0.9967 | 91.76 | 91.50 | 0.0491 | |
288 K | Pb2+ | 0.9872 | 443.8 | 456.3 | 0.0460 |
298 K | 0.9830 | 492.0 | 498.8 | 0.0439 | |
308 K | 0.9975 | 549.3 | 552.5 | 0.0473 |
Temperature | R2 | n | KL | |
---|---|---|---|---|
288 K | Fe3+ | 0.9594 | 2.232 | 10.42 |
298 K | 0.9443 | 2.341 | 12.09 | |
308 K | 0.9324 | 2.393 | 12.94 | |
288 K | Pb2+ | 0.9287 | 3.068 | 75.57 |
298 K | 0.9071 | 3.046 | 84.06 | |
308 K | 0.9051 | 3.031 | 92.67 |
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Yang, J.; Luo, Z.; Wang, M. Novel Fluorescent Nanocellulose Hydrogel Based on Nanocellulose and Carbon Dots for Detection and Removal of Heavy Metal Ions in Water. Foods 2022, 11, 1619. https://doi.org/10.3390/foods11111619
Yang J, Luo Z, Wang M. Novel Fluorescent Nanocellulose Hydrogel Based on Nanocellulose and Carbon Dots for Detection and Removal of Heavy Metal Ions in Water. Foods. 2022; 11(11):1619. https://doi.org/10.3390/foods11111619
Chicago/Turabian StyleYang, Jiachuan, Zhixin Luo, and Min Wang. 2022. "Novel Fluorescent Nanocellulose Hydrogel Based on Nanocellulose and Carbon Dots for Detection and Removal of Heavy Metal Ions in Water" Foods 11, no. 11: 1619. https://doi.org/10.3390/foods11111619