NDLI: Electrochemical oxidation and removal of arsenic using water-soluble polymers

Content Provider	Springer Nature Link
Author	Sánchez, Julio Butter, Bryan Rivas, Bernabé L. Basáez, Luis Santander, Paola
Copyright Year	2014
Abstract	In this work, the electrochemical oxidation of arsenite and its subsequent removal was studied using water-soluble poly[glycidyl methacrylate N-methyl-d-glucamine], P(GMA–NMG), and poly[2-(acryloyloxy)ethyl]trimethylammonium chloride, P(ClAETA). In the first stage, the electroanalysis of arsenic (via oxidation of arsenite to arsenate) by cyclic voltammetry in the presence of water-soluble polymers was conducted. The type of polymer, electrode (gold or platinum), polymer concentration, and pH were evaluated. The study indicated that using P(GMA–NMG) and a gold electrode, oxidation peaks were obtained at approximately +0.5 V versus Ag/AgCl. In the case of P(ClAETA), wide oxidation peaks were obtained at +0.8 V versus Ag/AgCl using a platinum electrode. The optimum concentration for both polymers was 0.05 mol L$^{−1}$. For P(GMA–NMG), the oxidation potential was influenced by a change of pH. The quantitative oxidation of As(III) to As(V) was conducted using metallic electrodes with higher surface areas. The conversion of arsenic as a function of applied potential was also evaluated. The results showed an efficient oxidation in the presence of both water-soluble polymers. Finally, 60 % of the As(V) could be removed through polymer-enhanced ultrafiltration. The results demonstrated an increase in the removal of pre-oxidized arsenic.
Starting Page	151
Ending Page	159
Page Count	9
File Format	PDF
ISSN	0021891X
Journal	Journal of Applied Electrochemistry
Volume Number	45
Issue Number	2
e-ISSN	15728838
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-12-30
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Arsenic oxidation Electroanalysis Ultrafiltration Water remediation Water-soluble polymers Electrochemistry Physical Chemistry Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Chemical Engineering Electrochemistry

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