| IWA Publishing Journals | | | Subscriptions | | | Authors | | | Users | | | Librarians | | | FAQs |
 |
Water Science & Technology Vol 65 No 11 pp 2055–2060 © IWA Publishing 2012 doi:10.2166/wst.2012.114 Adsorption of polyvinyl alcohol from wastewater by sintered porous red mudYihe Zhang, Wei Chen, Guocheng Lv, Fengzhu Lv, Paul K. Chu, Wenmin Guo, Baolin Cui, Rui Zhang and Hell WangState Key Laboratory of Geological Processes & Mineral Resources, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing, 100083, China E-mail: zyh@cugb.edu.cnDepartment of Physics & Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China ABSTRACT Several types of red mud-based porous materials (RMPM) and other raw minerals via different processes were prepared and characterized using X-ray diffraction (XRD) analyses and scanning electron microscope (SEM) observations. Using the polymer sponge method, a 72% apparent porosity could be reached compared with 64% by adding a pore-forming agent. These materials were tested for their adsorption of polyvinyl alcohol (PVA) from simulated textile wastewater. The best mass ratio of RMPM to PVA solution was 50:100 with a removal maximum of 25.8% after they were in contact for 50 min. The adsorption rate and kinetics could be better described by Lagergren's pseudo-second-order model in comparison with the pseudo-first-order model. Keywords: adsorption; porous materials; PVA; red mud eProduct: Buy this article for £24.00 (IWA MEMBER PRICE: £18.00) All prices include VAT. For customers where VAT should not be applied, the VAT amount will be removed upon payment |
|
 |
