Facile Separation of Cu[sup.2+] from Water by Novel Sandwich NaY Zeolite Adsorptive Membrane

• Published in: Separations Vol. 10; no. 3
• Main Authors: Guo, Yuexin, Zhang, Xu, Xie, Yuesheng, Hu, Yacong, Jia, Zhiqian, Ma, Yafei, Wang, Xin
• Format: Journal Article
• Language: English
• Published: MDPI AG 01.03.2023
• Subjects: Heavy metals; Zeolites; China
• ISSN: 2297-8739; 2297-8739
• DOI: 10.3390/separations10030171

Polyethersulfone-sulfonated polyethersulfone (PES-SPES)/NaY zeolite/nylon sandwich structure membranes were prepared and used to adsorb Cu[sup.2+] from water. The adsorption kinetics, adsorption isotherm, dynamic adsorption experiment, and reusability were discussed. The experimental data showed that the Langmuir isotherm model, Dubinin-Radushkevich (D-R) isotherm model, and the pseudo-first-order kinetic model can well represent the adsorption of Cu[sup.2+] on the membrane, indicating an ion exchange mechanism, with the maximum adsorption capacity of 111.25 mg·g[sup.−1]. Repeatability experiments show that the sandwich film still has good adsorption performance after five times of adsorption and desorption. The as-prepared membrane showed considerable separation performance in removing Cu[sup.2+] from aspirin solution, providing a feasible method to remove heavy metals from drugs.