Integrated Adsorption-Photocatalytic Decontamination of Oxytetracycline from Wastewater Using S-Doped TiO2/WS2/Calcium Alginate Beads
Abstract
:1. Introduction
2. Results and Discussion
2.1. Synthesis and Characterization
2.2. Adsorption Studies
2.3. Photocatalysis
2.4. Adsorption and Photocatalysis Mechanism
2.5. Stability and Reusability
2.6. Comparison of Adsorption and Photocatalytic Properties
3. Materials and Methods
3.1. Chemicals
3.2. Synthesis of S-TiO2/WS2/Alginate Beads
3.3. Materials Characterization
3.4. Adsorption and Photocatalytic Degradation of OTC
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Kinetic Model | Parameters | 10 mg/L | 25 mg/L |
---|---|---|---|
Pseudo-first order: | qe (exp) (mg g−1): qe (cal) (mg g−1): k1(min−1): R2: RMSE: χ2 | 4.70 4.697 0.019 0.980 0.196 0.560 | 8.10 7.550 0.026 0.960 0.449 0.411 |
Pseudo-second order: | qe (cal) (mg g−1): k2 (g mg−1 min−1): R2: RMSE: χ2 | 4.738 0.0036 0.987 0.156 0.269 | 8.889 0.0034 0.986 0.260 0.097 |
Elovich model: | a (mg g−1 min−1): β (mg g−1): R2: RMSE: χ2 | 0.185 0.706 0.988 0.155 0.106 | 0.453 0.492 0.992 0.196 0.083 |
Isotherm Model | Parameters | Values |
---|---|---|
Langmuir | qm (mg g−1): KL (L mg−1): R2: RMSE: χ2: | 27.692 0.023 0.938 1.413 1.602 |
Freundlich | n: Kf (mg g−1) (mg L−1)−1/nF: R2: RMSE: χ2: | 2.102 2.175 0.989 0.575 0.161 |
Temkin | Bt (J mg−1) Kt (L mg−1): R2: RMSE: χ2: | 497.485 0.375 0.936 1.441 1.018 |
Redlich–Peterson | × 10−5 (L/g): × 10−5 (L/mg): β: R2: RMSE: χ2: | 33.760 15.518 0.524 0.989 0.570 0.161 |
Materials/(Light Source) | Adsorption (A) /Photocatalytic (P) Efficiency | Conditions | Ref. | |||||
---|---|---|---|---|---|---|---|---|
pH | Mass (g) | Time (min.) | Temp. (°C) | Conc. (mg/L) | Volume (mL) | |||
POPD/TiO2/fly ash (VL) | 73% (P) | - | 0.10 | 60 | 30 | 10 | 50 | [54] |
Br(15%)/g-C3N4 (VL) | 75% (P) | - | 0.25 | 120 | - | 10 | 250 | [55] |
Co-B co-doped TiO2/SiO2 (VL) | 37% (P) | - | 0.05 | 100 | - | 5 | 5 | [56] |
N-ZnO/CdS/GO (VL) | 50 % (P) | - | 0.50 | 100 | 25 | 15 | 100 | [57] |
Co3O4/TiO2/GO (SL) | 65% (P) | 0.50 | 90 | 10 | 200 | [58] | ||
Nitrilotriacetic acid modified magnetic chitosan | 337.5 (A) | 8.0 | 0.25 | 350 | 25 | 100 | 50 | [59] |
Modified magnetic chitosan | 92 mg/g (A) | 8.0 | 0.25 | 350 | 25 | 100 | 50 | |
Lanthanum modified magnetic humic acid | 21.90 mg/g (A) | 6.0 | 0.05 | 30 | 25 | 10 | 50 | [60] |
Hydroxyapatite/Aluminosilicates composite | 57.39 mg/g (A) | 5.0 | 0.25 | 400 h | 35 | 10 | 250 | [61] |
GO functionalized magnetic particles | 45 mg/g (A) | 6.0 | 0.02 | 20 | - | 50 | 10 | [62] |
Co2+/F− co-doped TiO2-SiO2 (UV) | 42% (P) | - | - | 40 | - | 100 | - | [63] |
Fe3O4@C@TiO2 | 87.3 (A) | - | 0.050 | 120 | 25 | 50 | 1000 | [64] |
S-TiO2/WS2/alginate bead (SL) | 82 (P) | 6 | 0.10 | 240 | 24 | 25 | 100 | This study |
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Kumar, R.; Ansari, M.O.; Taleb, M.A.; Oves, M.; Barakat, M.A.; Alghamdi, M.A.; Al Makishah, N.H. Integrated Adsorption-Photocatalytic Decontamination of Oxytetracycline from Wastewater Using S-Doped TiO2/WS2/Calcium Alginate Beads. Catalysts 2022, 12, 1676. https://doi.org/10.3390/catal12121676
Kumar R, Ansari MO, Taleb MA, Oves M, Barakat MA, Alghamdi MA, Al Makishah NH. Integrated Adsorption-Photocatalytic Decontamination of Oxytetracycline from Wastewater Using S-Doped TiO2/WS2/Calcium Alginate Beads. Catalysts. 2022; 12(12):1676. https://doi.org/10.3390/catal12121676
Chicago/Turabian StyleKumar, Rajeev, Mohammad Omaish Ansari, Md Abu Taleb, Mohammad Oves, Mohamed A. Barakat, Mansour A. Alghamdi, and Naief H. Al Makishah. 2022. "Integrated Adsorption-Photocatalytic Decontamination of Oxytetracycline from Wastewater Using S-Doped TiO2/WS2/Calcium Alginate Beads" Catalysts 12, no. 12: 1676. https://doi.org/10.3390/catal12121676