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Effects of modified fly ash doped carbon paste electrodes and metal film electrodes on the determination of trace cadmium(ii) by anodic stripping voltammetry

Fly ash, as waste from coal combustion, has been effectively modified to improve its adsorption to remove toxic metals, and modified fly ash could be used for electrode modification to improve the sensitivity of the electrode. In this paper, a modified fly ash doped carbon paste electrode for the de...

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Autores principales: Hou, Jinying, Fan, Yuping, Ma, Xiaomin, Dong, Xianshu, Yao, Suling
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9032926/
https://www.ncbi.nlm.nih.gov/pubmed/35479702
http://dx.doi.org/10.1039/d0ra07493d
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author Hou, Jinying
Fan, Yuping
Ma, Xiaomin
Dong, Xianshu
Yao, Suling
author_facet Hou, Jinying
Fan, Yuping
Ma, Xiaomin
Dong, Xianshu
Yao, Suling
author_sort Hou, Jinying
collection PubMed
description Fly ash, as waste from coal combustion, has been effectively modified to improve its adsorption to remove toxic metals, and modified fly ash could be used for electrode modification to improve the sensitivity of the electrode. In this paper, a modified fly ash doped carbon paste electrode for the detection of trace cadmium was first and successfully developed. Several parameters affecting the anodic stripping voltammetric response of Cd(ii) were optimized, such as the composition of the paste, pH of the measurement solution, the concentration of Sb(iii) (or Sb(iii) and Bi(iii)), deposition potential and deposition time. Compared with Sb/MFA-CPE, the square wave anodic stripping voltammetry (SWASV) response of Cd(ii) at Sb/MMFA-CPE had a higher linear range and lower sensitivity. Relative to MFA, MMFA-CPE, due to the introduction of CTAB, provided a larger effective area for interacting with analytes, more binding sites and further facilitating electron transfer at the electrode, and amplified the electrochemical signal. Compared with Sb/MMFA-CPE, the SWASV response of Cd(ii) at Sb–Bi/MMFA-CPE had a higher linear range and similar sensitivity, since mechanisms at bismuth and antimony film electrodes were different. Besides, the electrode reactions of Cd(ii) at bismuth film electrodes involved adsorption phenomena while they were free of adsorption at antimony film electrodes.
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spelling pubmed-90329262022-04-26 Effects of modified fly ash doped carbon paste electrodes and metal film electrodes on the determination of trace cadmium(ii) by anodic stripping voltammetry Hou, Jinying Fan, Yuping Ma, Xiaomin Dong, Xianshu Yao, Suling RSC Adv Chemistry Fly ash, as waste from coal combustion, has been effectively modified to improve its adsorption to remove toxic metals, and modified fly ash could be used for electrode modification to improve the sensitivity of the electrode. In this paper, a modified fly ash doped carbon paste electrode for the detection of trace cadmium was first and successfully developed. Several parameters affecting the anodic stripping voltammetric response of Cd(ii) were optimized, such as the composition of the paste, pH of the measurement solution, the concentration of Sb(iii) (or Sb(iii) and Bi(iii)), deposition potential and deposition time. Compared with Sb/MFA-CPE, the square wave anodic stripping voltammetry (SWASV) response of Cd(ii) at Sb/MMFA-CPE had a higher linear range and lower sensitivity. Relative to MFA, MMFA-CPE, due to the introduction of CTAB, provided a larger effective area for interacting with analytes, more binding sites and further facilitating electron transfer at the electrode, and amplified the electrochemical signal. Compared with Sb/MMFA-CPE, the SWASV response of Cd(ii) at Sb–Bi/MMFA-CPE had a higher linear range and similar sensitivity, since mechanisms at bismuth and antimony film electrodes were different. Besides, the electrode reactions of Cd(ii) at bismuth film electrodes involved adsorption phenomena while they were free of adsorption at antimony film electrodes. The Royal Society of Chemistry 2021-05-10 /pmc/articles/PMC9032926/ /pubmed/35479702 http://dx.doi.org/10.1039/d0ra07493d Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Hou, Jinying
Fan, Yuping
Ma, Xiaomin
Dong, Xianshu
Yao, Suling
Effects of modified fly ash doped carbon paste electrodes and metal film electrodes on the determination of trace cadmium(ii) by anodic stripping voltammetry
title Effects of modified fly ash doped carbon paste electrodes and metal film electrodes on the determination of trace cadmium(ii) by anodic stripping voltammetry
title_full Effects of modified fly ash doped carbon paste electrodes and metal film electrodes on the determination of trace cadmium(ii) by anodic stripping voltammetry
title_fullStr Effects of modified fly ash doped carbon paste electrodes and metal film electrodes on the determination of trace cadmium(ii) by anodic stripping voltammetry
title_full_unstemmed Effects of modified fly ash doped carbon paste electrodes and metal film electrodes on the determination of trace cadmium(ii) by anodic stripping voltammetry
title_short Effects of modified fly ash doped carbon paste electrodes and metal film electrodes on the determination of trace cadmium(ii) by anodic stripping voltammetry
title_sort effects of modified fly ash doped carbon paste electrodes and metal film electrodes on the determination of trace cadmium(ii) by anodic stripping voltammetry
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9032926/
https://www.ncbi.nlm.nih.gov/pubmed/35479702
http://dx.doi.org/10.1039/d0ra07493d
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