A new integrated approach for dye removal from wastewater by polyoxometalates functionalized membranes

• Main Authors: Yao, Lei, Zhang, Lizhi, Wang, Rong, Chou, Shuren, Dong, ZhiLi
• Other Authors: School of Civil and Environmental Engineering
• Format: Article
• Language: English
• Published: 2015
• Subjects: Membrane; Dye removal; Polyoxometalates; Adsorption; Catalytic degradation
• Online Access: https://hdl.handle.net/10356/80947; http://hdl.handle.net/10220/38970
• Institution: Nanyang Technological University

Membrane technique is a promising way for the removal of dyes from wastewater. A unique approach combining both the adsorptive and the catalytic membrane processes was proposed on the basis of a new functionalized membrane. The membrane integrating both the adsorptive and catalytic activities was developed by introducing polyoxometalates (POMs) as an ideal candidate for the membrane functionalization via a novel sol–gel method. A two-step protocol, adsorptive separation and catalytic degradation, was designed for dye removal, realizing an excellent dye rejection with easy and economic membrane regeneration through simply soaking the membrane in a limited volume of dilute oxidant solution. This approach is feasible and versatile owing to the flexible selection of distinct POMs and design of catalytic degradation routes as required. As a result, the current research provides insight into a new methodology of the membrane technique in dye removal applications.