Research Article SimultaneousElectrochemicalDetectionofPbandCdbyCarbon Paste Electrodes Modified by Activated Clay Niraka Blaise, 1 HambateGomdjeVal´ ery , 1 Raja Maallah, 2 Mohamed Oubaouz, 2 Bakary Tigana Djonse Justin, 1 Edwin Andrew Ofudje , 3 and Abdelilah Chtaini 2 1 National Advanced School of Engineering, University of Maroua, P.O. Box 46, Maroua, Cameroon 2 Team of Molecular Electrochemistry and Inorganic Materials, Faculty of Sciences and Technology, Sultan Moulay Slimane University of Beni Mellal, Beni Mellal, Morocco 3 Department of Chemical Sciences, Mountain Top University, Prayer City, Ogun State, Nigeria CorrespondenceshouldbeaddressedtoHambateGomdjeVal´ ery;valeryhambate@gmail.comandEdwinAndrewOfudje; eaofudje@mtu.edu.ng Received 9 October 2021; Accepted 6 December 2021; Published 19 January 2022 AcademicEditor:JaroonJakmunee Copyright©2022NirakaBlaiseetal.isisanopenaccessarticledistributedundertheCreativeCommonsAttributionLicense, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Calcinated and acidified clay modified carbon graphite electrode was deployed in the simultaneous evaluation of traces of Pb 2+ andCd 2+ insolution.After5minutesofaccumulationinthecircuit,thesensitivityoftheelectrodewasevaluatedinasolutionof Na 2 SO 4 (0.1M) by square wave voltammetry on the one hand with Pb (II) and on the other hand with Cd (II). Several ex- perimentalconditionssuchasthecompositionofthecarbonclaypaste,theeffectofpreconcentrationtime,thesweepingspeed, concentration effect, media pH, and interference ionic response to the electrochemical response of the working electrode were examined.Itwasobservedthat,after5minutesofpreconcentration,detectionlimitsof0.15513 μmol·L −1 and 0.24227 μmol·L −1 were obtained for Pb 2+ andCd 2+ in the electrolyte solution and 0.08438 μmol·L −1 and 0.46522 μmol·L −1 , respectively, when tap waterwasused.edetectionwaseffectivebysquarewavevoltammetrywithamoreintensecurrentdensitywithrespecttolead. 1.Introduction Heavy metals are used in many areas of life, but excessive anduncontrolledusecanbeharmfultotheenvironmentand to human health [1]. e presence of these heavy metals in aquatic environments results from natural and anthropo- genicactivities[2].Excessiveanduncontrolleduseofheavy metals can increase their concentration even in drinking water and could be harmful to living organisms. Prolonged exposure even to low doses of lead (Pb 2+ ) and cadmium (Cd 2+ ) ions by inhalation or ingestion can cause acute and chronic nuisances such as decrease in hemoglobin level, headache, nausea, dizziness, vomiting, constipation or di- arrhea, breathing difficulties, haematuria, gastrointestinal haemorrhage,acutehepaticfailure,cardiovasculardisorder, neurotoxic effect (in children), abdominal cramps, and impact on the immune system [3, 4]. isrequiresincreasedandreal-timemonitoringwitha view to either reducing their presence in drinking water or completeremoval.Severaltechniquesforanalyzingtracesof heavymetalsinwaterhavebeenused,amongotherswhich are IC (ion chromatography), ICP-AES (atomic emission spectroscopy coupled with inductive plasma), AAS (atomic absorption spectroscopy), and ICP-MS (mass spectroscopy coupled with an inductive plasma) [5–7]. ese techniques certainlygiveconvincingresults,butAAS,forexample,isa destructivemethod,limitedjusttochemicalelementsinthe atomicstate;inaddition,theelementtobeanalyzedmustbe knowninadvance,anditsconcentrationmustbeatthetrace scale at the risk of damaging the machine [8]. In addition, ICP-MSandICP-AEShavethedrawbackofpretreatingthe samples before analysis and with very expensive equipment maintenance cost [9, 10]. Under another prism, the rapid reaction,thegreatsensitivity,andtheportabilityrelatingto Hindawi Journal of Analytical Methods in Chemistry Volume 2022, Article ID 6900839, 9 pages https://doi.org/10.1155/2022/6900839