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Removal of arsenite by coupled electrocatalytic oxidation at polymer–ruthenium oxide nanocomposite and polymer-assisted liquid phase retention

Paper ID Volume ID Publish Year Pages File Format Full-Text
45992 46428 2013 7 PDF Available
Title
Removal of arsenite by coupled electrocatalytic oxidation at polymer–ruthenium oxide nanocomposite and polymer-assisted liquid phase retention
Abstract

Nanocomposite materials synthesized by incorporation of ruthenium oxide nanoparticles into a poly(pyrrole-alkylammonium) matrix have been characterized by transmission electron microscopy and by electrochemistry. Ruthenium oxide-based nanocomposites films coated onto carbon appeared efficient electrocatalysts for the oxidation of arsenic(III) into arsenic(V) species at a remarkable low potential, i.e. in the 0.3–0.5 V vs. Ag/AgCl range. Bulk electrocatalytic oxidation of arsenite solutions could be performed in the presence of a water-soluble poly(quaternary ammonium) salts acting as the supporting electrolyte and also as an As(V) complexing agent, which allowed to combine electrocatalytic oxidation of As(III) with the liquid phase polymer-assisted retention (LPR) technique to efficiently remove arsenic from polluted solutions.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A polymer–ruthenium oxide nanocomposite was electrosynthesized and fully characterized. ► Carbon electrodes were modified with films of this nanocomposite. ► The modified electrodes exhibited high catalytic activity toward As(III) oxidation. ► As(III) oxidation combined with ultrafiltration allowed efficient arsenic removal.

Keywords
Ruthenium oxide composites; Electrocatalytic oxidation; Arsenic; Ultrafiltration
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Removal of arsenite by coupled electrocatalytic oxidation at polymer–ruthenium oxide nanocomposite and polymer-assisted liquid phase retention
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 129, 17 January 2013, Pages 130–136
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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