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Fe(VI)-assisted photocatalytic degradating of microcystin-LR using titanium dioxide

Paper ID Volume ID Publish Year Pages File Format Full-Text
28789 44091 2006 6 PDF Available
Title
Fe(VI)-assisted photocatalytic degradating of microcystin-LR using titanium dioxide
Abstract

Microcystin cyanobacterial hepatotoxins represent an increasingly severe global health hazard. This study focused on enhancing photocatalytic degradation of microcystin-LR (MCLR) following the addition of ferrate as the indirect electron acceptors to the process. The degradation rate of MCLR by ferrate or the photocatalysis only was 54 and 63%, respectively. However, when relatively low ferrate dose (0.08 mmol/L) was added to the photocatalytic process, a significant enhancement in the photocatalytic rate was observed and the efficiency can be increased to 100%. Compared the effect of Fe(III) and Fe(VI) on the photocatalysis rate, the process of Fe(VI)-assisted photocatalytic degradation of MCLR apparently existed the synergistic effect and the photocatalysis rate constant k of Fe(VI)/UV/TiO2 process was higher than Fe(III)/UV/TiO2 by 2.5 times and than UV/TiO2 by 4.4 times, but an overdose of ferrate will retard the rate due to the short circuiting reactions between Fe3+ and Fe2+ and the lower absorption of UV light. As expected, pH had a remarkable influence on the reaction rate of detoxification of microcystin-LR and pH 6 was beneficial to the photocatalytic process.

Keywords
Cyanobacteria; Microcystin-LR; Ferrate-assisted; Photocatalytic degradation; Synergetic effect; Removal efficiency
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Fe(VI)-assisted photocatalytic degradating of microcystin-LR using titanium dioxide
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 178, Issue 1, 20 February 2006, Pages 106–111
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us