Fabrication of low-cost ceramic ultrafiltration membrane made from bentonite clay and its application for soluble dyes removal. Issue 6 (June 2020)

• Record Type: Journal Article
• Authors: Saja, S.; Bouazizi, A.; Achiou, B.; Ouaddari, H.; Karim, A.; Ouammou, M.; Aaddane, A.; Bennazha, J.; Alami Younssi, S.
• Is Part Of: Journal of the European Ceramic Society. Volume 40:Issue 6(2020)
• Page Start: 2453
• Page End: 2462
• Publication Date: 2020-06
• Subjects: Ceramic membrane -- Natural perlite -- Bentonite -- Ultrafiltration -- Dyes; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2020.01.057
• Languages: English
• ISSNs: 0955-2219

Abstract

Highlights: Bentonite UF membrane layer was effectively prepared via spin-coating method. The influence of bentonite concentration on membrane properties was investigated. Bentonite membrane was applied for removal of Direct Red 80 and Rhodamine B. High dyes rejection is due to both sieving mechanism and electrostatic interactions. The prepared bentonite membrane could be used to treat real industrial wastewater. Abstract: This work reports the preparation and the characterization of low-cost ultrafiltration bentonite membrane deposited on ceramic perlite support. The bentonite layer was obtained by spin-coating process of colloidal solution with different bentonite contents ranging from 0.25 to 1.50 wt.%, followed by sintering at 500 °C. It was confirmed that optimized membrane prepared with 0.75 wt.% of bentonite is homogeneous and exhibits a good adhesion on perlite support. Furthermore, the membrane has a thickness of 6 μm, a pore size of 13 nm and a permeability of 30 L/h.m 2 .bar. In addition, the filtration performance of bentonite membrane was evaluated by tangential filtration of Direct Red 80 and Rhodamine B solutions under pressure of 4 bar. The effect of filtration time and initial feed concentration on flux and rejection was studied and showed that the rejection of Direct Red 80 and Rhodamine B could achieve value of 97.0 and 80.1 % respectively.