| Photocatalytic magnetic separable beads for chromium (VI) reduction. | |
| | |
MedLine Citation:
|
PMID: 19963234 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Magnetically separable photocatalyst beads containing nano-sized iron oxide in alginate polymer were prepared. This magnetic photocatalyst beads are used in slurry-type reactors. The magnetism of the catalyst arises from the nanostructured particles gamma-Fe(2)O(3), by which the catalyst can be easily recovered by the application of an external magnetic field. These synthesized beads are sunlight-driven photocatalyst. In the system without magnetic photocatalyst beads, no chromium reduction was observed under sunlight irradiation due to the stability of the chromium (VI). Upon the addition of magnetic photocatalyst beads, the photo-reduction of Cr(VI) was completed in just after only 50min under sunlight irradiation due to the photocatalytic activity of the beads. However when placed away from sunlight, the reduction rate of the chromium is just about 10%. These observations were explained in terms of absorption occurrence of chromium (VI) onto the catalyst surface which took place in this reaction. In addition, photo-reduction rate of chromium (VI) was more significant at lower pH. The results suggest that the use of magnetic separable photocatalyst beads is a feasible strategy for eliminating Cr(VI). |
| | |
Authors:
|
Ani Idris; Nursia Hassan; Nur Suriani Mohd Ismail; Effaliza Misran; Noordin Mohd Yusof; Audrey-Flore Ngomsik; Agnes Bee |
Related Documents
:
|
19001544 - Mr imaging detection of cerebral microbleeds: effect of susceptibility-weighted imaging... 16295874 - Magnetically agitated photocatalytic reactor for photocatalytic oxidation of aqueous ph... 3973144 - Low field (0.02 t) nuclear magnetic resonance imaging of the brain. 18958914 - Images of war: using satellite images for human rights monitoring in turkish kurdistan. 9203254 - Reversible mri lesions after seizures. 12766274 - The application of a new predictive technique for lossless compression of medical images. |
Publication Detail:
|
Type: Journal Article Date: 2009-11-26 |
Journal Detail:
|
Title: Water research Volume: 44 ISSN: 1879-2448 ISO Abbreviation: Water Res. Publication Date: 2010 Mar |
Date Detail:
|
Created Date: 2010-03-01 Completed Date: 2010-09-30 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0105072 Medline TA: Water Res Country: England |
Other Details:
|
Languages: eng Pagination: 1683-8 Citation Subset: IM |
Copyright Information:
|
Copyright 2009 Elsevier Ltd. All rights reserved. |
Affiliation:
|
Department of Bioprocess Engineering, Faculty of Chemical and Natural Resource Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia. ani@fkkksa.utm.my |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Alginates
/
chemistry Catalysis / radiation effects Chromium / chemistry* Ferric Compounds / chemistry Glucuronic Acid / chemistry Hexuronic Acids / chemistry Hydrogen-Ion Concentration Light* Magnetics* Microscopy, Electron, Transmission Microspheres* Nanoparticles / chemistry Oxidation-Reduction Particle Size Photochemistry X-Ray Diffraction |
| Chemical | |
Reg. No./Substance:
|
0/Alginates; 0/Ferric Compounds; 0/Hexuronic Acids; 1309-37-1/ferric oxide; 576-37-4/Glucuronic Acid; 7440-47-3/Chromium; 9005-32-7/alginic acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Argyrophilic grain disease: Synergistic component of dementia?
Next Document: Use of macroalgae stored in an Environmental Specimen Bank for application of some European Framewor...