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Nanocomposites for water treatment - Maghemite as a photocatalyst

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Publication date31/12/2007
Host publicationECS Trancsactions - Industrial Electrolysis and Electrochemical Engineering General Session
PublisherECS Transactions
Pages17-27
Number of pages11
Volume6
Edition9
ISBN (print)9781604238853
<mark>Original language</mark>English
EventIndustrial Electrolysis and Electrochemical Engineering General Session - 211th ECS Meeting - Chicago, IL, United States
Duration: 6/05/200711/05/2007

Conference

ConferenceIndustrial Electrolysis and Electrochemical Engineering General Session - 211th ECS Meeting
Country/TerritoryUnited States
CityChicago, IL
Period6/05/0711/05/07

Publication series

NameECS Transactions
Number9
Volume6
ISSN (Print)1938-5862
ISSN (electronic)1938-6737

Conference

ConferenceIndustrial Electrolysis and Electrochemical Engineering General Session - 211th ECS Meeting
Country/TerritoryUnited States
CityChicago, IL
Period6/05/0711/05/07

Abstract

The treatment of waste water involves, amongst other processes, the removal of heavy metal ion pollutants and/or organic contaminants. As one component of a potential aluminosilicate nanocomposite for water treatment, we have demonstrated the effectiveness of using Maghemite (γ-Fe2O 3) as a photocatalyst for the reduction of the aqueous pollutant chromium(VI) to chromium(III) in the presence of a sacrificial organic reductant. Maghemite has the twin advantages of being a photocatalyst that exhibits strong absorbance in the visible region of the spectrum and of being magnetic, so facilitating post processing solid/liquid separation. During this study, a simple, robust, calibrationless potentiometric technique for monitoring the concentration of chromium(VI) was developed. This method allowed the photocatalytic reduction of Cr(VI) to be observed in real-time with no sample pre-treatment.