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

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• 作者：Juan Francisco Rivera^a ; Christophe Bucher^a ; Eric Saint-Aman^a ; Bernab&eacute ; L. Rivas^b ; Mar&iacute ; a del Carmen Aguirre^b ; Julio Sanchez^b ; Isabelle Pignot-Paintrand^c ; ¹ ; Jean-Claude Moutet^a ; ^{jean-claude.moutet@ujf-grenoble.fr}
• 关键词：Ruthenium oxide composites ; Electrocatalytic oxidation ; Arsenic ; Ultrafiltration
• 刊名：Applied Catalysis B: Environmental
• 出版年：2013
• 出版时间：17 January, 2013
• 年：2013
• 卷：129
• 期：Complete
• 页码：130-136
• 全文大小：775 K

文摘

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.