Utilization of industrial waste lithium-silicon-powder for the fabrication of novel nap zeolite for aqueous Cu(II) removal. (20th August 2020)

• Record Type: Journal Article
• Authors: Pu, Xiaoqin; Yao, Lu; Yang, Lin; Jiang, Wenju; Jiang, Xia
• Is Part Of: Journal of cleaner production. Volume 265(2020)
• Publication Date: 2020-08-20
• Subjects: Industrial waste -- Lithium-silicon-powder -- NaP zeolite -- Adsorption -- Cu(II); Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2020.121822
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: An industrial waste, lithium-silicon-powder, was used as a raw material to produce NaP zeolite (PZ) via a one-step-hydrothermal method. The as-synthesized PZ was used for Cu(II) removal from aqueous solution. High adsorption capacity was obtained on PZ. Besides, the PZ could be recycled and reused after desorption and with a stable capacity of approximately 62.3 mg/g (298 K). Batch experiments including the influences of PZ dosages, solution pH, adsorption temperature, and initial concentration, as well as the results of N2 physisorption, XRD, FTIR, SEM, and XPS, indicated that the mechanism responsible for Cu(II) removal was Na + ion on the PZ surface exchanged with Cu 2+ in solution, and the Cu 2+ was mainly adsorbed on the Si–OH sites on PZ. Overall, the findings presented in this work suggested that PZ has a considerable potential application in low-cost and eco-friendly heavy metal removal from water. Highlights: NaP zeolite was prepared from the industrial waste lithium-silicon-powder. 62.3 mg/g adsorption capacity of Cu(II) was obtained at room temperature. Na + ion on the surface of NaP zeolite exchanged with the Cu 2+ in the solution. The Cu 2+ was mainly adsorbed on the Si–OH sites on PZ. The as-synthesized NaP zeolite showed excellent reusability.