Crayfish Carapace Micro-powder (CCM): A Novel and Efficient Adsorbent for Heavy Metal Ion Removal from Wastewater
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Adsorption Experiments
2.3. Determination of Calcium Level
3. Results and Discussion
3.1. Effect of Adsorbent Dosages
3.2. Adsorption Kinetics
Ions | Pseudo first-order equation | Pseudo second-order equation | |||||
---|---|---|---|---|---|---|---|
Qe (mg/g) | k1 | R2 | Qe (mg/g) | k2 | R2 | ||
Cu | 93.045 | 0.0294 | 0.8916 | 106.383 | 0.0025 | 0.9651 | |
Cd | 101.3705 | 0.0469 | 0.8622 | 116.2791 | 0.0881 | 0.9514 | |
Zn | 61.8682 | 0.0365 | 0.8077 | 63.6943 | 0.0302 | 0.9796 | |
Pb | 77.2632 | 0.0415 | 0.9139 | 82.6445 | 0.0452 | 0.9314 |
3.3. Effect of CCM Size
3.4. Effect of Solution pH
3.5. Thermodynamic Property of Adsorption
Metal ions | ΔH (KJ/g) | R2 |
---|---|---|
Cu | −2,036.26 | 0.9497 |
Cd | 4,223.51 | 0.9592 |
Zn | 54,006.08 | 0.9963 |
Pb | - | - |
3.6. Adsorption Isotherm
Ion | Langmuir | Freundlich | |||||
---|---|---|---|---|---|---|---|
Qm (mg/g) | B (mL/mg) | R2 | Kf (mg/g) | n | R2 | ||
Cu | 200 | 0.0852 | 0.9772 | 30.481 | 2.3207 | 0.9683 | |
Cd | 217.39 | 0.6053 | 0.9924 | 99.315 | 5.0428 | 0.9427 | |
Zn | 80 | 0.0945 | 0.9722 | 34.519 | 6.6445 | 0.9461 | |
Pb | 322.58 | 0.1148 | 0.9992 | 42.06 | 1.6841 | 0.9822 |
3.7. Effect of Calcium Level of CCM
3.8. Comparison of Adsorption between CCM, Chitin and Chitosan
4. Conclusions
Acknowledgements
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Zheng, X.; Li, B.; Zhu, B.; Kuang, R.; Kuang, X.; Xu, B.; Ma, M. Crayfish Carapace Micro-powder (CCM): A Novel and Efficient Adsorbent for Heavy Metal Ion Removal from Wastewater. Water 2010, 2, 257-272. https://doi.org/10.3390/w2020257
Zheng X, Li B, Zhu B, Kuang R, Kuang X, Xu B, Ma M. Crayfish Carapace Micro-powder (CCM): A Novel and Efficient Adsorbent for Heavy Metal Ion Removal from Wastewater. Water. 2010; 2(2):257-272. https://doi.org/10.3390/w2020257
Chicago/Turabian StyleZheng, Xiaodong, Bin Li, Bo Zhu, Rui Kuang, Xuan Kuang, Baoli Xu, and Meihu Ma. 2010. "Crayfish Carapace Micro-powder (CCM): A Novel and Efficient Adsorbent for Heavy Metal Ion Removal from Wastewater" Water 2, no. 2: 257-272. https://doi.org/10.3390/w2020257