Characterization and Application of Carbon Paste Electrode Modified by Moringa Oleifera Seed Powder to the Electrochemical Detection of Mercury

Kouamé Jean Marc N' Guessan

Jean Lorougnon Guédé University of Daloa, UFR Environment, Science Laboratory and Environmental Technologies (LSTE), BP 150 Daloa, Ivory Coast.

Seiny Roger N'Dri *

School Normal Superior of Abidjan, Department of Science and Technology, Laboratory of Fundamental and Applied Physical Sciences (LSPFA), Group of Research in Electrochemistry (GRE), 08 BP 10 Abidjan 08 Abidjan, Ivory Coast.

Yapi Hermann Arstide Yapo

Jean Lorougnon Guédé University of Daloa, UFR Environment, Science Laboratory and Environmental Technologies (LSTE), BP 150 Daloa, Ivory Coast.

Légré Paul Gauly

Jean Lorougnon Guédé University of Daloa, UFR Environment, Science Laboratory and Environmental Technologies (LSTE), BP 150 Daloa, Ivory Coast.

Ali Sanou

School Normal Superior of Abidjan, Department of Science and Technology, Laboratory of Fundamental and Applied Physical Sciences (LSPFA), Group of Research in Electrochemistry (GRE), 08 BP 10 Abidjan 08 Abidjan, Ivory Coast and Félix Houphouët-Boigny University, UFR-SSMT, Constitution and Reaction Laboratory of Matter (LCRM), 22 BP 582 Abidjan, Ivory Coast and National Polytechnic Institute Félix Houphouët-Boigny, Process Laboratory Industrial Syntheses of the Environment and New Energies, BP 1313 Yamoussoukro, Ivory Coast.

Segninhintenin Bakary Soro

School Normal Superior of Abidjan, Department of Science and Technology, Laboratory of Fundamental and Applied Physical Sciences (LSPFA), Group of Research in Electrochemistry (GRE), 08 BP 10 Abidjan 08 Abidjan, Ivory Coast and Félix Houphouët-Boigny University, UFR-SSMT, Constitution and Reaction Laboratory of Matter (LCRM), 22 BP 582 Abidjan, Ivory Coast.

Mariame Coulibaly

School Normal Superior of Abidjan, Department of Science and Technology, Laboratory of Fundamental and Applied Physical Sciences (LSPFA), Group of Research in Electrochemistry (GRE), 08 BP 10 Abidjan 08 Abidjan, Ivory Coast.

Drissa Bamba

School Normal Superior of Abidjan, Department of Science and Technology, Laboratory of Fundamental and Applied Physical Sciences (LSPFA), Group of Research in Electrochemistry (GRE), 08 BP 10 Abidjan 08 Abidjan, Ivory Coast.

N' Guessan Alfred Yao

School Normal Superior of Abidjan, Department of Science and Technology, Laboratory of Fundamental and Applied Physical Sciences (LSPFA), Group of Research in Electrochemistry (GRE), 08 BP 10 Abidjan 08 Abidjan, Ivory Coast.

*Author to whom correspondence should be addressed.


Abstract

Heavy metal pollution of surface waters from anthropogenic activities is constantly increasing. Monitoring techniques must therefore be more precise and more sensitive. One of the effective methods available is the development of sensitive electrochemical sensors, dedicated to the analysis of pollutants in aqueous solution. The carbon paste electrode (CPE) in this study was modified with Moringa Oleifera seed powder, a flocculant-adsorbent used to treat water. This chemically modified electrode presented improved electrochemical reactivity in cyclic votammetry towards the redox marker Ferri / Ferrocyanide compared to the bare carbon paste electrode. The 10 % modifier presented the most interest during the analysis. The Modified electrode was used to detect mercury (II) in anodic stripping voltammetry. The detection current of mercury (II) is seven times that of carbon paste electrode (CPE). The calibration curve is linear in the range from 0.002 μmol/L to 0.009 μmol/L (0.4 μg/L to 1.8 μg/L) with a detection limit of 0.4 ηmol/L (i.e.0.08 μg/L). This new technique can be used for routine monitoring of real aqueous matrices.

Keywords: Electrochemical sensor, Complexation, modified electrode, Mercury (II), cyclic voltammetry, anodic stripping voltammetry


How to Cite

Guessan , Kouamé Jean Marc N’, Seiny Roger N’Dri, Yapi Hermann Arstide Yapo, Légré Paul Gauly, Ali Sanou, Segninhintenin Bakary Soro, Mariame Coulibaly, Drissa Bamba, and N’ Guessan Alfred Yao. 2024. “Characterization and Application of Carbon Paste Electrode Modified by Moringa Oleifera Seed Powder to the Electrochemical Detection of Mercury”. Chemical Science International Journal 33 (1):36-46. https://doi.org/10.9734/CSJI/2024/v33i1883.

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