Fe-La-Ce-ZSM-5 zeolite for adsorbing Congo red

In this experiment, ZSM-5 molecular sieves are prepared by hydrothermal synthesis and modified by impregnation with Fe, La, and Ce loading. X-ray diffraction, X-ray photon-electron spectroscopy, and scanning electron microscopy show that Fe, La, and Ce elements are successfully loaded onto the surface of the material, and the surface area of Fe-La-Ce-ZSM-5 is 241.66 m${}^2$ g${}^{-1}$. A systematic study on the adsorption of Congo red solution is carried out using Fe-La-Ce-ZSM-5 molecular sieves and it is found through the adsorption data that the adsorption process is more in line with Langmuir and the proposed second-order kinetic model, and the theoretical saturated adsorption capacity is 2669.19 mg g${}^{-1}$. The adsorption process is recycled four times and still has more than 60 % removal performance for high-concentration Congo red solution. The results of this experiment show that Fe-La-Ce-ZSM-5 molecular sieves show excellent removal performance for Congo red dye in wastewater. (© 2024 Wiley‐VCH GmbH)