Open AccessElectrochemical Detection of Iron in a Lixiviant Solution of Polluted Soil Using a Modified Glassy Carbon Electrode
Author(s) -
D. I. Anguiano,
María Guadalupe Lugo García,
Clara Ruiz,
J. Torres,
Ivonne Liliana Alonso-Lemus,
Lorena Álvarez‒Contreras,
Ysmael Verde-Gómez,
Erika Bustos
Publication year - 2012
Publication title -
international journal of electrochemistry
Language(s) - English
Resource type - Journals
eISSN - 2090-3537
pISSN - 2090-3529
DOI - 10.1155/2012/739408
Subject(s) - amperometry , lixiviant , materials science , electrode , carbon nanotube , polyaniline , aqueous solution , glassy carbon , carbon fibers , electrochemistry , cyclic voltammetry , inorganic chemistry , chemical engineering , nanotechnology , metallurgy , composite material , chemistry , polymer , composite number , sulfuric acid , polymerization , organic chemistry , engineering
This paper presents preliminary results on the modification of glassy carbon electrodes with Multiwall Carbon Nanotubes with or without Polyaniline and Pt nanoparticles as electrocatalytic materials for metallic pollutants detection. Electrodes were constructed and incorporated as amperometric detectors of ionic iron electroreduction using the Flow Injection Amperometric technique in aqueous solution. The results not only revealed the modified electrode with nanotubes, polyaniline and platinum nanoparticles were the most selective and sensitive, but also provided an electroanalytic tool to analyze iron in lixiviated samples of polluted soil. The proposed iron sensor exhibited a linear response between 0 and 10 mM with detection and quantification limits of 0.003 and 0.012 μM, respectively. The aqueous samples were taken from a lixiviated solution of polluted soil from Mineral de Pozos, Guanajuato, Mexico, to define the erosion grade of soil
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