Fe‐La‐Ce‐ZSM‐5 Zeolite for Adsorbing Congo Red

Abstract

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 m2 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.