Adsorptive Removal of Pyridine in Simulation Wastewater Using Coke Powder
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Methods
2.2.1. Batch Adsorption Tests
2.2.2. Adsorption Isotherm Analysis
3. Results and Discussion
3.1. Coke Powder Properties
3.2. Effect of Coke Powder Concentration
3.3. Effect of Contact Time
3.4. Effect of Initial Pyridine Concentration
3.5. Effect of Ash Content in Coke Powder
3.6. Effect of Solution pH
3.7. Reuse of Regenerated Coke Powder After Heat Treatment
3.8. Adsorption Isotherm Modeling
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Conditions | Pyridine Concentration (mg/L) | Coke Powder Concentration (g/L) | Oscillation Speed (r/min) | Contact Time (min) | Ash Content (%) | Temperature (K) | pH | |
---|---|---|---|---|---|---|---|---|
Parameters | ||||||||
Coke powder concentration | 40 | 5–100 | 150 | 30 | 27.37 | 298 | – | |
Contact time | 40 | 60 | 150 | 5–90 | 27.37 | 298 | – | |
Initial pyridine concentration | 5–80 | 60 | 150 | 30 | 27.37 | 298 | – | |
Ash content | 40 | 60 | 150 | 30 | 27.37, 12.78 | 298 | – | |
pH | 40 | 60 | 150 | 30 | 27.37 | 298 | 2-12 | |
Regeneration of adsorbents | 40 | 60 | 150 | 30 | 27.37 | 298 | – |
Content (%) | SiO2 | CaO | Al2O3 | Fe2O3 | MgO | K2O | Na2O |
---|---|---|---|---|---|---|---|
Coke powder (Ash 27.37%) | 6.15 | 4.58 | 5.36 | 2.62 | 0.52 | 0.14 | 0.11 |
Coke powder (Ash 12.78%) | 2.67 | 2.13 | 2.24 | 0.98 | 0.31 | 0.10 | 0.09 |
Specific Surface Area (m2/g) | Average Pore Size (nm) | Mesoporous Volume (cm3/g) | Total Pore Volume (cm3/g) | |
---|---|---|---|---|
Coke powder (Ash 27.37%) | 51.54 | 3.23 | 0.019 | 0.019 |
Coke powder (Ash 12.78%) | 63.46 | 3.55 | 0.020 | 0.020 |
Coke Powder Concentration (g/L) | Pyridine Removal Efficiency by Coke Powder with 27.37% of Ash Content (%) | Pyridine Removal Efficiency by Coke Powder with 12.78% of Ash Content (%) |
---|---|---|
5 | 27.23 | 28.50 |
10 | 31.21 | 35.89 |
20 | 35.89 | 47.65 |
40 | 54.96 | 68.54 |
60 | 66.97 | 85.20 |
80 | 67.32 | 84.06 |
Adsorbent | Number of Reuses | Specific Surface Area (m2/g) | Average Pore Size (nm) | Mesoporous Volume (m3/g) | Total Pore Volume (m3/g) |
---|---|---|---|---|---|
Coke powder | 0 | 51.54 | 3.23 | 0.019 | 0.019 |
1 | 51.34 | 7.43 | 0.021 | 0.025 | |
3 | 50.52 | 8.23 | 0.025 | 0.027 | |
5 | 50.23 | 9.56 | 0.031 | 0.036 | |
7 | 50.15 | 10.01 | 0.040 | 0.043 | |
9 | 50.09 | 12.32 | 0.052 | 0.055 |
Adsorbate | Adsorbent | Isotherm Models | Constants and Correlation Coefficients | |||
---|---|---|---|---|---|---|
Pyridine | Coke powder | Langmuir | KL (L/mg) | qm (mg/g) | RLa | R2 |
0.0529 | 31.7460 | 0.8921 | 0.9240 | |||
Freundlich | KF (L/mg) | 1/n | - | R2 | ||
0.9518 | 0.3531 | - | 0.9939 | |||
Temkin | KT (L/mg) | bT (KJ/mol) | - | R2 | ||
3.1571 | 3.0592 | - | 0.8874 |
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Gao, Q.; Wang, L.; Li, Z.; Xie, Y.; He, Q.; Wang, Y. Adsorptive Removal of Pyridine in Simulation Wastewater Using Coke Powder. Processes 2019, 7, 459. https://doi.org/10.3390/pr7070459
Gao Q, Wang L, Li Z, Xie Y, He Q, Wang Y. Adsorptive Removal of Pyridine in Simulation Wastewater Using Coke Powder. Processes. 2019; 7(7):459. https://doi.org/10.3390/pr7070459
Chicago/Turabian StyleGao, Qieyuan, Lei Wang, Zhipeng Li, Yaqi Xie, Qiongqiong He, and Yongtian Wang. 2019. "Adsorptive Removal of Pyridine in Simulation Wastewater Using Coke Powder" Processes 7, no. 7: 459. https://doi.org/10.3390/pr7070459