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Photocatalytic magnetic separable beads for chromium (VI) reduction

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 ?-Fe2O3, by which the catalyst can be easily recov...

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Main Authors:	Idris, Ani, Hassan, Nursia, Mohd. Ismail, Nur Suriani, Misran, Effaliza, Mohd. Yusof, Noordin, Ngomsik, Audrey-Flore, Bee, Agnes
Format:	Article
Language:	English
Published:	ELSEVIER 2009
Subjects:	T Technology (General) TD Environmental technology. Sanitary engineering
Online Access:	http://eprints.utm.my/id/eprint/21961/3/Photocatalytic_magnetic_separable_beads_for_chromium_%28VI%29_reduction.pdf http://eprints.utm.my/id/eprint/21961/
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record_format	eprints
spelling	my.utm.219612017-10-17T00:17:01Z http://eprints.utm.my/id/eprint/21961/ Photocatalytic magnetic separable beads for chromium (VI) reduction Idris, Ani Hassan, Nursia Mohd. Ismail, Nur Suriani Misran, Effaliza Mohd. Yusof, Noordin Ngomsik, Audrey-Flore Bee, Agnes T Technology (General) TD Environmental technology. Sanitary engineering 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 ?-Fe2O3, 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 50 min 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). ELSEVIER 2009-11 Article PeerReviewed text/html en http://eprints.utm.my/id/eprint/21961/3/Photocatalytic_magnetic_separable_beads_for_chromium_%28VI%29_reduction.pdf Idris, Ani and Hassan, Nursia and Mohd. Ismail, Nur Suriani and Misran, Effaliza and Mohd. Yusof, Noordin and Ngomsik, Audrey-Flore and Bee, Agnes (2009) Photocatalytic magnetic separable beads for chromium (VI) reduction. Water Research, 44 (6). pp. 1683-1688. ISSN 0043-1354 10.1016/j.watres.2009.11.026
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
language	English
topic	T Technology (General) TD Environmental technology. Sanitary engineering
spellingShingle	T Technology (General) TD Environmental technology. Sanitary engineering Idris, Ani Hassan, Nursia Mohd. Ismail, Nur Suriani Misran, Effaliza Mohd. Yusof, Noordin Ngomsik, Audrey-Flore Bee, Agnes Photocatalytic magnetic separable beads for chromium (VI) reduction
description	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 ?-Fe2O3, 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 50 min 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).
format	Article
author	Idris, Ani Hassan, Nursia Mohd. Ismail, Nur Suriani Misran, Effaliza Mohd. Yusof, Noordin Ngomsik, Audrey-Flore Bee, Agnes
author_facet	Idris, Ani Hassan, Nursia Mohd. Ismail, Nur Suriani Misran, Effaliza Mohd. Yusof, Noordin Ngomsik, Audrey-Flore Bee, Agnes
author_sort	Idris, Ani
title	Photocatalytic magnetic separable beads for chromium (VI) reduction
title_short	Photocatalytic magnetic separable beads for chromium (VI) reduction
title_full	Photocatalytic magnetic separable beads for chromium (VI) reduction
title_fullStr	Photocatalytic magnetic separable beads for chromium (VI) reduction
title_full_unstemmed	Photocatalytic magnetic separable beads for chromium (VI) reduction
title_sort	photocatalytic magnetic separable beads for chromium (vi) reduction
publisher	ELSEVIER
publishDate	2009
url	http://eprints.utm.my/id/eprint/21961/3/Photocatalytic_magnetic_separable_beads_for_chromium_%28VI%29_reduction.pdf http://eprints.utm.my/id/eprint/21961/
_version_	1643647345025351680
score	13.211869

Photocatalytic magnetic separable beads for chromium (VI) reduction

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