Modified PVA-alginate encapsulated photocatalyst ferro photo gels for Cr(VI) reduction
| Autor: | Ani Idris, Effaliza Misran, Chan Eng Seng, Nursia Hassan, Aishah Abd. Jalil |
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| Rok vydání: | 2012 |
| Předmět: |
Chromium
Environmental Engineering Materials science Alginates Health Toxicology and Mutagenesis Metal Nanoparticles Maghemite Nanoparticle engineering.material Bead Ferric Compounds Polyvinyl alcohol Catalysis Magnetics chemistry.chemical_compound Glucuronic Acid Environmental Chemistry Waste Management and Disposal chemistry.chemical_classification Aqueous solution Waste management Hexuronic Acids Polymer Photochemical Processes Pollution chemistry Polyvinyl Alcohol visual_art Sunlight Photocatalysis engineering visual_art.visual_art_medium Gels Oxidation-Reduction Water Pollutants Chemical Nuclear chemistry Superparamagnetism |
| Zdroj: | Journal of Hazardous Materials. :309-316 |
| ISSN: | 0304-3894 |
| DOI: | 10.1016/j.jhazmat.2012.05.065 |
| Popis: | In this study magnetic separable photocatalyst beads containing maghemite nanoparticles (γ-Fe 2 O 3 ) in polyvinyl alcohol (PVA) polymer were prepared and used in the reduction of Cr(VI) to Cr(III) in an aqueous solution under sunlight. The unique superparamagnetic property of the photocatalyst contributed by the γ-Fe 2 O 3 and robust property of PVA polymer allow the magnetic beads to be recovered easily and reused for at least 7 times without washing. The concentration of γ-Fe 2 O 3 was varied from 8% (v/v) to 27% (v/v) and the results revealed that the beads with 8% (v/v) γ-Fe 2 O 3 exhibited the best performance where Cr(VI) was reduced to Cr(III) in only 30 min under sunlight. The use of the PVA has improved the bead properties and life cycle of beads which is in line with sustainable practices. |
| Databáze: | OpenAIRE |
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