Preparation of Attapulgite/CoFe2O4 Magnetic Composites for Efficient Adsorption of Tannic Acid from Aqueous Solution
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Synthesis of ATP/CoFe2O4 Magnetic Composites
2.3. Characterization of the Magnetic Sorbent
2.4. Batch Adsorption Experiments
2.5. Analysis
3. Results and Discussion
3.1. Characterization
3.1.1. SEM and EDX
3.1.2. FTIR
3.1.3. XRD
3.1.4. VSM
3.2. TA Adsorption by ATP/CoFe2O4 Magnetic Composites
3.2.1. Adsorption Kinetics
3.2.2. Adsorption Isotherms
3.3. Recyclability and Magnetic Performance of ATP/CoFe2O4 Magnetic Composites
3.4. Removal Mechanisms of TA by ATP/CoFe2O4 Magnetic Composites
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Element | Weight Percentage | Atomic Percentage | ||
---|---|---|---|---|
CoFe2O4 | ATP/CoFe2O4 | CoFe2O4 | ATP/CoFe2O4 | |
C | 15.99 | 24.25 | 24.64 | 36.81 |
N | 11.26 | / | 14.88 | / |
O | 38.66 | 41.61 | 44.71 | 47.42 |
Na | 9.77 | 2.67 | 7.86 | 2.11 |
Mg | / | 1.71 | / | 1.28 |
Al | / | 1.16 | / | 0.79 |
Si | / | 7.2 | / | 4.67 |
Ca | / | 0.41 | / | 0.19 |
Fe | 8.46 | 13.77 | 5.25 | 4.49 |
Co | 15.85 | 7.22 | 2.66 | 2.23 |
Total | 100 | 100 |
First-Order Kinetics | Second-Order Kinetics | |||||
---|---|---|---|---|---|---|
h | ||||||
0.6873 | 211.8122 | 0.0215 | 0.9779 | 147.0588 | 0.0002071 | 4.4783 |
T/K | Langmuir | |||
---|---|---|---|---|
Equation | B | |||
298 | 1/qe = 0.5045/Ce + 0.0014 | 0.9841 | 714.2857 | 0.0028 |
308 | 1/qe = 0.5375/Ce + 0.0039 | 0.9964 | 256.4103 | 0.0073 |
318 | 1/qe = 0.7046/Ce + 0.0025 | 0.9906 | 400.0000 | 0.0035 |
T/K | Freundlich | |||
---|---|---|---|---|
Equation | R22 | k | n | |
298 | ln qe = 0.8073ln Ce + 1.1963 | 0.9656 | 3.3079 | 1.2387 |
308 | ln qe = 0.7554ln Ce + 1.1881 | 0.9806 | 3.2808 | 1.3238 |
318 | ln qe = 0.8039ln Ce + 0.8727 | 0.9778 | 2.3934 | 1.2439 |
T/K | |||
---|---|---|---|
298 | −12.61 | −31.95 | −2.96 |
308 | −3.04 | ||
318 | −2.31 |
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Teng, Y.; Liu, Z.; Yao, K.; Song, W.; Sun, Y.; Wang, H.; Xu, Y. Preparation of Attapulgite/CoFe2O4 Magnetic Composites for Efficient Adsorption of Tannic Acid from Aqueous Solution. Int. J. Environ. Res. Public Health 2019, 16, 2187. https://doi.org/10.3390/ijerph16122187
Teng Y, Liu Z, Yao K, Song W, Sun Y, Wang H, Xu Y. Preparation of Attapulgite/CoFe2O4 Magnetic Composites for Efficient Adsorption of Tannic Acid from Aqueous Solution. International Journal of Environmental Research and Public Health. 2019; 16(12):2187. https://doi.org/10.3390/ijerph16122187
Chicago/Turabian StyleTeng, Yue, Zhiying Liu, Ke Yao, Wenbin Song, Yongjun Sun, Hailing Wang, and Yanhua Xu. 2019. "Preparation of Attapulgite/CoFe2O4 Magnetic Composites for Efficient Adsorption of Tannic Acid from Aqueous Solution" International Journal of Environmental Research and Public Health 16, no. 12: 2187. https://doi.org/10.3390/ijerph16122187