Abstract
In the present study, a series of TiO2-loaded chitosan biochar (TiO2/CSB) have been synthesized by loading different TiO2, and applied for the uptake of cationic dye Rhodamine B (Rh B). The structure and properties of TiO2/CSB composites before and after adsorption have been analyzed by infrared spectroscopy, powder X-ray diffraction, field emission scanning electron microscopy coupled with energy disperse spectroscopy, and X-ray photoelectron spectroscopy. The effect of significant parameters such as TiO2 content of adsorbent, initial dye concentration, pH, dose, time, temperature, and co-existing anion in batch adsorption experiments have been investigated. TiO2/CSB composite show enhanced adsorption performance for Rh B dye compared to pure TiO2 and chitosan biochar. Kinetic study verifies that pseudo second order kinetic model is the predominant model, and the equilibrium data have been compatible well with the Langmuir isotherm. As an efficient adsorbent, TiO2/CSB has relatively high adsorption performance after 5 times of recycling. Results suggest that TiO2/CSB has good environmental remediation and water treatment application characteristics.
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This work was supported by Natural Science Foundation of Tianshui city (2020- FZJHK-3111, 2021-FZJHK-1302), College Teachers Innovation Fund project of Gansu Province (2023B-142), and the Scientific Research Project of Gansu Province (21JR11RE038).
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Xiao-fang Li, Li, Rx., He, Ds. et al. Superior Adsorption Performance of TiO2-Loaded Chitosan Biochar for Rhodamine B Dye. Russ. J. Inorg. Chem. 68, 1084–1095 (2023). https://doi.org/10.1134/S0036023622602811
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DOI: https://doi.org/10.1134/S0036023622602811