title: Adsorption of polyvinyl alcohol from wastewater by sintered porous red mud.
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.
authors.affiliation: State 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. zyh@cugb.edu.cn
authors.forename: Yihe
authors.initials: Y
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.forename: Guocheng
authors.initials: G
authors.lastname: Lv
authors.forename: Fengzhu
authors.initials: F
authors.lastname: Lv
authors.forename: Paul K
authors.initials: PK
authors.lastname: Chu
authors.forename: Wenmin
authors.initials: W
authors.lastname: Guo
authors.forename: Baolin
authors.initials: B
authors.lastname: Cui
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.forename: Hell
authors.initials: H
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D012987:Soil; D013783:Textile Industry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods; D014961:X-Ray Diffraction
chemical_list: D012987:Soil; D014874:Water Pollutants, Chemical; D011142:Polyvinyl Alcohol