Abstract
The excessive use of phosphates causes water eutrophication, which is an important factor of water pollution. In this study, a composite adsorbent hydrotalcite (Fe2O3-HT) was prepared by an impregnation method. The adsorbent was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscope (XPS), Fourier transform infrared (FT-IR), N2 adsorption and desorption isotherms. The removal performance of Fe2O3-HT for phosphate was investigated by an adsorption technology. The adsorption process was an endothermic reaction. According to the analysis, it was more in line with the pseudo-first-order kinetic model. The results showed that the adsorption capacity of Fe2O3-HT for phosphate can be reached 97%. The adsorption capacity of phosphate in water can still reach more than 95% after 4 regenerations. The modified hydrotalcite had high phosphate adsorption capacity and good regeneration performance.
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Funding
This work was supported by National Natural Science Foundation of China (no. 21271008) and the Anhui Provincial Natural Science Foundation (no. 2008085QE194), Research Foundation of the Institute of Environment-friendly Materials and Occupational Health of Anhui University of Science and Technology (Wuhu) (nos. ALW2020YF01, ALW2020YF09).
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Lifang Hu contributed to the review and revision of manuscripts, characterization analysis and to the overall supervision. Hui Wang has contributed to the experimental work, characterization work and manuscript writing. Xinyang Huang contributed to the repeatability verification of the experimental results and experimental methods. Jichao Zhu contributed to the characterization work and mechanism analysis work. Jie He contributed to the review, writing, and revision of the original manuscripts. Xiaoyang Chen contributed to the rendering of images.
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Hu, L., Wang, H., Huang, X. et al. Promoted Adsorption Performance of Modified Hydrotalcite with Fe2O3 for Phosphate in Wastewater. Russ. J. Phys. Chem. 97, 2812–2821 (2023). https://doi.org/10.1134/S0036024423120191
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DOI: https://doi.org/10.1134/S0036024423120191