Biopolymer-Modified Carbon Paste Electrode for the Electrochemical Detection of Pb(II) in Water

Ousama Ifguis; Abdelaziz Moutcine; Charaf Laghlimi; Younes Ziat; Rachid Bouhdadi; Abdelilah Chtaini; Amine Moubarik; Mohamed Mbarki

doi:10.1155/2022/5348246

Biopolymer-Modified Carbon Paste Electrode for the Electrochemical Detection of Pb(II) in Water

J Anal Methods Chem. 2022 Jan 31:2022:5348246. doi: 10.1155/2022/5348246. eCollection 2022.

Authors

Ousama Ifguis¹, Abdelaziz Moutcine², Charaf Laghlimi³, Younes Ziat⁴, Rachid Bouhdadi¹, Abdelilah Chtaini², Amine Moubarik⁵, Mohamed Mbarki¹

Affiliations

¹ Engineering Laboratory in Chemistry and Physics of Matter, Faculty of Science and Technics, Sultan Moulay Slimane University, Beni Mellal, Morocco.
² Electrochemistry and Molecular Inorganic Materials Team, Sultan Moulay Slimane University, Faculty of Sciences and Technology in Beni-Mellal, Beni Mellal, Morocco.
³ Applied Chemistry Team, Faculty of Sciences and Techniques of Al Hoceima, Abdelmalek Essaadi University, Tetouan, Morocco.
⁴ Engineering and Applied Physics Team (EAPT), Sultan Moulay Slimane University, Beni Mellal, Morocco.
⁵ Laboratory of Chemical Processes and Applied Materials, Sultan Moulay Slimane University, Polydisciplinary Faculty, Beni Mellal, Morocco.

Abstract

During the present study, biopolymer lignin was extracted, in particular, from sugar beet pulp (molasses) from the Tadla region (224 km from Marrakech, Morocco). The lignin was characterized by infrared spectroscopy (FTIR) and thermogravimetric TG/DTA analysis and then used as a modifier to enhance the electroanalytical detection of heavy metal ion traces. The performance of the lignin/CPE sensor to detect lead (II) was studied by cyclic voltammetry (CV) and square-wave voltammetry in 0.3 mol L^-1 NaCl. With optimized experimental parameters, the lignin/CPE sensor developed has a minimum detection limit of 2.252.10^-11 M for Pb (II). The proposed working electrode has been successfully applied for the coanalysis of Pb (II) in tap water with good results.