Promoted Adsorption Performance of Modified Hydrotalcite with Fe2O3 for Phosphate in Wastewater

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