Adsorption Performance of Methylene Blue by KOH/FeCl3 Modified Biochar/Alginate Composite Beads Derived from Agricultural Waste
Abstract
:1. Introduction
2. Results and Discussion
2.1. Characterization
2.2. Effect of pH on Adsorption
2.3. Adsorption Kinetics
2.4. Adsorption Isotherm
2.5. Adsorption Thermodynamics
2.6. Regeneration and Reusability
3. Materials and Methods
3.1. Materials
3.2. Preparation of KOH/FeCl3 Modified Corncob Biochar (MCB)
3.3. Preparation of MCB/ALG Composite Beads
3.4. Characteristics of Samples
3.5. Batch Adsorption Experiments
3.6. Regeneration Experiment
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Sample | BET Surface Area (m2/g) | Pore Volume (cm3/g) | Pore Diameter (nm) |
---|---|---|---|
CB | 25.9 | 0.006 | 7.6 |
MCB | 468.4 | 0.3 | 6.0 |
MCB/ALG | 128.8 | 0.1 | 8.1 |
Sample | qe,exp (mg/L) | Pseudo-First-Order Model | Pseudo-Second-Order Model | ||||
---|---|---|---|---|---|---|---|
qe,cal (mg/g) | k1 (/min) | RMSE | qe,cal (mg/g) | k2 (g/mg·min) | RMSE | ||
MCB/ALG−1 | 1040.7 | 957.3 | 0.005 | 105.1 | 1055.2 | 7.31 × 10−6 | 81.4 |
MCB | 585.92 | 525.8 | 0.02 | 46.0 | 562.7 | 6.09 × 10−5 | 25.1 |
T (K) | Langmuir | Freundlich | ||||
---|---|---|---|---|---|---|
qm (mg/g) | KL (L/mg) | RMSE | KF (L/mg) | nF | RMSE | |
303 | 1373.49 | 0.0030 | 105.05 | 55.93 | 2.37 | 127.88 |
313 | 1457.28 | 0.0031 | 94.47 | 59.26 | 2.3 | 116.74 |
323 | 1485.03 | 0.0037 | 106.91 | 70.73 | 2.45 | 127.25 |
Raw | Pyrolysis Temperature (°C) | qm (mg/g) | Reference |
---|---|---|---|
Tamarind seed | 500 | 102.77 | [43] |
Sodium carboxymethyl cellulose | 900 | 249.6 | [44] |
Bamboo | 600 | 286.1 | [45] |
Alfalfa | 600 | 326.90 | [35] |
Rattan stalks | 600 | 359 | [46] |
Coffee grounds | 600 | 367 | [47] |
Waste tea | 450 | 683.6 | [48] |
Corncobs | 800 | 1373.49 | This work |
Corncob-to-xylose residue | 850 | 1563.9 | [49] |
T (K) | ΔG (kJ·mol −1) | ΔH (kJ·mol −1) | ΔS (kJ·mol −1 K−1) |
---|---|---|---|
303 | −0.2551 | 9.4163 | 0.0754 |
313 | −0.3726 | ||
323 | −0.6369 |
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Liu, H.; Zhu, J.; Li, Q.; Li, L.; Huang, Y.; Wang, Y.; Fan, G.; Zhang, L. Adsorption Performance of Methylene Blue by KOH/FeCl3 Modified Biochar/Alginate Composite Beads Derived from Agricultural Waste. Molecules 2023, 28, 2507. https://doi.org/10.3390/molecules28062507
Liu H, Zhu J, Li Q, Li L, Huang Y, Wang Y, Fan G, Zhang L. Adsorption Performance of Methylene Blue by KOH/FeCl3 Modified Biochar/Alginate Composite Beads Derived from Agricultural Waste. Molecules. 2023; 28(6):2507. https://doi.org/10.3390/molecules28062507
Chicago/Turabian StyleLiu, Heng, Jiaqi Zhu, Qimei Li, Likun Li, Yanjun Huang, Yi Wang, Guozhi Fan, and Lei Zhang. 2023. "Adsorption Performance of Methylene Blue by KOH/FeCl3 Modified Biochar/Alginate Composite Beads Derived from Agricultural Waste" Molecules 28, no. 6: 2507. https://doi.org/10.3390/molecules28062507