Chtaini Abdelilah

Université Sultan Moulay Slimane · Chimie & Environnement

This work aims to study the electrolytic oxidation of ethanol bio catalyzed with bacteria in NaCl 1M solution by a carbon paste electrode modified with zinc. The electrodes were obtained by depositing the zinc on carbon paste electrode substrates by electrodeposition, using potentiostat and galvanostatic techniques. Morphological characterization b...

An electrochemical sensor was designed using carbon paste and acidified and calcinated clay to detect traces of Cu (II) and Hg (II) metal ions in solution. After 5 minutes of accumulation in open circuit, the sensitivity of the electrode was evaluated in a solution of Na 2 SO 4 (0.1M) by square wave voltammetry on the one hand with Cu (II) and on t...

In this article we have set ourselves the objective of developing new functional materials applied in electroanalysis. The aim is to develop new modified electrodes having analytical performance by immobilizing an organic film based on Disodium ethylenediaminetetraacetate dihydrate (EDTA) on the surface of carbon paste electrode (CPE). We performed...

Dans ce papier, nous proposons une méthode efficace de purification des eaux contaminées par les métaux lourds très toxiques (cas du mercure), par l'utilisation d'une plante médicinale, qui a démontré un grand pouvoir chélateur de ces métaux (mercure). Le suivi de la cinétique de la réaction de chélation a été investi par l'utilisation des méthodes...

A natural phosphate electrode modified with antibiotic (amoxivillin) was employed for the detection and quantification of Staphylococcus aureus from aqueous solutions. The new electrode (AMX-NPE) revealed interesting electroanalytical detection of Staphylococcus aureus based on the adsorption of these bacteria onto antibiotic under open circuit con...

The electrochemical behavior of bacteria, such Staphylococcus aureus, at clay modified carbon paste electrode is reported. The influence of variables such as the accumulation time, optical density (OD) was tested by square wave voltammetry (SWV), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The interaction of bacteria a...

This work aims to study the electrolytic oxidation of ethanol in alkaline solution by a carbon paste electrode modified with natural phosphate and cobalt (Co-NP/CPE). The electrodes were obtained by depositing the cobalt on carbon-NP substrates by electrodeposition, using potentiostatic and galvanostatic techniques. Morphological characterisation b...

In this paper, a novel antibiotic modified carbon paste electrode (AMX-CPE) was fabricated for the directly determination of bacteria, such Staphylococcus aureus in physiological media. Electrochemical properties and morphological study of the modified electrode were greatly studied. We report a sensitive electrochemical voltammetric method for the...

In this work, an electrochemical sensor was prepared by modifying a carbon paste with the organic molecule of 2-benzimidazolethiol (CPE/OM) by mixing methods (by combination of the organic molecules and the carbon electrode). The sensor was tested for detection of lead ions in an aqueous solution. All reactions studied took place on the modified el...

This work aims to study the electrolytic oxidation of ethanol in alkaline solution by a carbon paste electrode modified with natural phosphate and cobalt (Co-NP/CPE). The electrodes were obtained by depositing the cobalt on carbon-NP substrates by electrodeposition, using potentiostatic and galvanostatic techniques. Morphological characterisation b...

In the present study, A novel electrochemical sensor based on CPE-NP-M for determination of heavy metals was proposed. The electrode constructed in this work was studied in 0.3 M NaCl solution. The performance of the NP-Al2O3 for determination of Pb (II) and Hg (II) was studied using cyclic voltammetry (CV), square wave voltammetry and electrochemi...

During the present study, biopolymer lignin was extracted, in particular, from sugar beet pulp (molasses) from the Tadla region (224 km from Marrakech, Morocco). e 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...

Calcinated and acidified clay modified carbon graphite electrode was deployed in the simultaneous evaluation of traces of Pb2+ and Cd2+ in solution. After 5 minutes of accumulation in the circuit, the sensitivity of the electrode was evaluated in a solution of Na2SO4 (0.1 M) by square wave voltammetry on the one hand with Pb (II) and on the other h...

The aim of this work is to prepare and characterize a carbon-clay paste electrode doped with Titanium Oxide (CPEA/TiO 2). This electrode is used to study the electrochemical behavior of drugs such as Chloroquin, Azithromycin and Hydroxychloroquin. The morphological, structural and functional characteristics of this electrode were carried out using...

A simple and efficient system has been described for selective detection of p-nitrophenol. Herein α -Fe2O3@MgAl-CO3-Layered double hydroxides nanocomposite was coated on carbon-paste electrode (CPE) to electrochemical determination of p-nitrophenol via voltammetric analysis. The α -Fe2O3@MgAl-CO3-LDH nanocomposite was synthesized by coprecipitation...

The sensor, intended for the detection of heavy metals (Pb(II), Hg(II), and Cd(II)), is realized by the modification of the carbon paste electrode (EPC) by an organic molecule (2-benzimidazole C7H6N2S (BIT)). Physical parameters that could influence current densities have been studied and optimized; the optimum parameters are: pH= 2, precentration...

We have prepared a new graphite carbon paste electrode modified with di-sodium ethylenediamine tetraacetic acid (C10H16N2O8) to quantify NH4+ in human urine. Numerous electrochemical methods have been implemented to monitor the behavior of the developed electrode towards these ions (NH4+): electron impedance spectroscopy, cyclic voltammetry and squ...

The bio electrochemical behavior of West Nile virus at mixed carbon-phosphate paste electrode modified with Peroxidase-Secondary Antibody Conjugate (PAS) is reported. A Cyclic Voltammetry (VC), Square Wave Voltammetry and Impedance Spectroscopic methods were investigated. The influence of variables such as the accumulation time, pH solution and PAS...

Mesoporous Ni/Al-Layered double hydroxide (Ni/Al-LDH) surface has been assembled with metal oxides (Fe2O3). The obtained nanocomposite structure has been tested as probe electrode for the electrochemical detection of mercury Hg (II) in solution. An electrochemical study of the CPE-Fe2O3@Ni/Al-LDH modified electrode is achieved in the presence of me...

This work aims to develop a new abase anode of organic molecule to study the electro-oxidation of methanol, in an alkaline solution with a carbon paste electrode modified by Ethylene-diamine tetra acetic acid disodium salt dehydrate EDTA-CPE, by cyclic voltammetry, measurements of ‘impedance and chronoemperometry. Radiography carried out morphologi...

The objective of this work is the standardization of the operating parameters of the carbon graphite paste (CPE) electrode modified by di-sodium ethylenediamine tetraacetic acid (EDTA) for the detection and quantification of Pb(II). The prepared electrode was used for the simultaneous detection of Pb (II), Co (II) and Cu (II) in drinking water. It...

A carbon paste electrode modified with 2-Benzimidazolethiole (MO-CPE) was evaluated as an electrochemical sensor for Pb(II) in buffer solution. The electrode was prepared by immobilisation the organic molecule on the carbon paste electrode surface and its complex formation with Pb(II) was studied by square wave voltammetry and cyclic Voltammetry. I...

The carbon paste electrode (CPE) modified with di-sodium ethylenediamine tetra-acetic acid (EDTA) is used as a sensor for the simultaneous detection and quantification of Pb(II), Cu(II) and Co(II) in drinking water. The performance of this sensor is revealed by two electrochemical methods; Square Wave Voltammetry (SWV) and Cyclic Voltammetry (CV)....

The method used to immobilize the polymer on the Disodium ethylenediamine tetraacetate (EDTA) modified carbon paste electrode (CPE/EDTA) has proved its effectiveness for the detection and chelation of heavy metals in aqueous solution. Its complex formation with Pb(II) was examined by square wave voltammetry and cyclic voltammetry. CPE/EDTA electrod...

The nanoparticle ZnO-NP was manufactured by doping natural phosphate (NP) with zinc. The resulting sample was characterized by different techniques such as DRX, FT-IR, SEM. The ZnO-NP/CPE electrode has been applied for the simultaneous determination of Cd (II) and Hg (II). The electrochemical measurement of the elaborate sensor toward the hazardous...

In this present study, we synthesized the NP-Al2O3 powder using impregnation method and it has been characterized by infrared spectroscopy (IR), SEM, X-ray diffraction, then was used as modifier in order to improve electroanalytical sensor trace heavy metal ions. The performance of the NP-Al2O3 to detect lead (II) and mercury (II) was studied using...

Modified electrodes; Cyclic voltammetry; Clay; Hg(II) detection. KEYWORDS ABSTRACT A sensitive voltammetric method for detection of mercury ions is described which is made by modifying a carbon paste electrode with clay. A linear working range for concentration of mercury between 0.18mM to 0.91mM. The electrochemical responses obtained by cyclic vo...

This paper studies the detection of Lead ions by using a Disodium ethylenediaminetetraacetate dihydrate (EDTA) modified Carbon Paste electrode. The modified electrode was used for the electrochemical analysis of trace lead ions by square wave voltammetry (SWV) technique. It was found that the EDTA-CPE electrode shows a better performance than the c...

This work continues to focus on evaluating the electrochemical behavior of the steels Hastelloy C2000 and SAF 2205, after heat treatment in 700 °C and 900 °C in 1 M phosphoric acid. In addition, it reports on the effect of sulfate as a corrosion inhibitor of the two steels by using two electrochemical methods Tafel polarization and Electrochemical...

The aim of this work is to introduce bacteria into the matrix of natural phosphate to catalyze the phenol oxidation in the wastewater.This electrode, designated subsequently by bacteria-NP-CPE, Showed stable response and was characterized with voltammeter methods, as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and DRX. The...

The aim of this study was to produce an inexpensive and easy to implement electrochemical sensor. The synthesis of a composite from poly (vinyl alcohol) and natural clay enabled to obtain a material with interesting properties, in view of the results achieved from thermal analysis and transmission electron microscopy. The layer film of natural poly...

The voltammeter degradation of the phenol was carried out at a microbial electrode. This electrode is based on carbon graphite and clay and modified by bacteria. This electrode, later designated by bacteria-clay-CPE, showed stable response and was characterized by voltammeter methods, such as cyclic voltammetry (CV) and electrochemical Impedance sp...

A Cyclic voltammetry (VC), Square Wave Voltammetry and Impedance Spectroscopie methods for the determination of trace amounts of phenol at bacteria-polymer-Clay-CPE bioelectrode is proposed. The results showed that the bacteria-polymer-Clay-CPE exhibited excellent electro catalytic activity to phenol. This electrochemical biosensor shows an excelle...

The modification of graphite carbon is made by adding a quantity of organic molecules, the 10% of organic molecule in electrode is able to detect with great sensitivity The behavior of Pb2+ and NH4+ is studied by three electrochemical methods: Square Wave Voltammetry (SWV), Cyclic voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). T...

The modification of graphite carbon is made by adding a quantity of 2-Benzimidazole Thiol (BIT), the 10% BIT electrode is able to detect with great sensitivity the lead in the electrolyte solution containing 0.1 mol / L NaCl with a detection limit (DL, 3s) equal to 2,77.10-9 mol/l and quantification limit (QL, 10s) worth 9,24.10-9 mol/l. The behavi...

In this work, we have studied the performance of carbon past electrodes (CPE) coated with £-caprolactone polymer composites was investigated as an electrochemical sensor in the determination of Cu 2+ ions in a 0.1M NaCl solution. The presence of the polymer on the surface of the carbon paste electrode facilitates the analyte adsorption to the surfa...

Bioelectrochemical systems based on bacteria thin film modified electrode were explored. The prepared bacteria modified aluminum electrode was characterized with voltametric methods, as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and Electrochemical polarization curves. The proposed electrode indicated a definite redox res...

In this study, a sensitive electrochemical voltammetry method for the analysis of extra cellular adenosine (AD) using a carbon paste electrochemical (CPE) modified with a porous material, such as natural phosphate (NP), was proposed. Adenosine strongly adsorbed on a electrode surface and prepared electrode NP-CPE provides easy methods for the detec...

Nous avons confectionné une électrode à pâte de carbone graphite modifiée par une molécule organique (EDTA) afin de détecter et de quantifier les ions ammoniums (NH4 +) dans des échantillons de l'urine humaine. Notre étude est basée sur la révélation du comportement électrochimique des ions NH4 + dans un milieu électrolytique contenant 0,1M de NaCl...

RESUME Nous avons confectionné une électrode à pâte de carbone graphite modifiée par une molécule organique (EDTA) afin de détecter et de quantifier les ions ammoniums (NH4 +) dans des échantillons de l'urine humaine. Notre étude est basée sur la révélation du comportement électrochimique des ions NH4 + dans un milieu électrolytique contenant 0,1M...

A novel bio electrode containing bacteria immobilized on clay mixed carbon paste electrode (Bactria-clay-CPE) is developed for detection and degradation of the phenolic solutions based on electrochemical techniques such cyclic voltammetry, square wave voltammetry, electroctrochemical impedence spectroscopy. The results obtained showed that bacteria...

A novel bio electrode containing bacteria immobilized on clay mixed carbon paste electrode (Bactria-clay-CPE) is developed for detection and degradation of the phenolic solutions based on electrochemical techniques such cyclic voltammetry, square wave voltammetry, electroctrochemical impedence spectroscopy. The results obtained showed that bacteria...

Article history: In this work, we have combined two electrochemical methods to eliminate the phenol in a solution. Theelectro-oxidation method based on titanium-modified carbon paste electrode and the electrocoagulation method based on aluminum electrodes. EO was applied alone to treat phenol, EC was used as a pretreatment method to remove suspende...

Article history: In this work, we have combined two electrochemical methods to eliminate the phenol in a solution. Theelectro-oxidation method based on titanium-modified carbon paste electrode and the electrocoagulation method based on aluminum electrodes. EO was applied alone to treat phenol, EC was used as a pretreatment method to remove suspende...

Ammonium is the final product of the catabolism of proteins by living organisms, its presence in high amounts in human blood is an indicator kidney disorder, stomach bacterial infection or liver dysfunction. The presence of an excess of ammonium in the environment is an important indicator of pollution. The ammonium cation, NH4 +, is the ionized fo...

The performance of carbon paste electrodes modified with 2-Benzimidazole Thiol (BIT) was investigated as a modified electrode for the determination of lead. 2-Benzimidazole was developed and introduced as a new modifying agent for heavy metal chelation. The physical parameters that could influence the current densities were investigated and optimiz...

The aim of this work is to combine two methods for removing nitrate ions from concentrated aqueous solutions. This involves chelating and then reducing NO3⁻ by EDTE modified carbon paste electrode (EDTA-CPE). We find that in the absence of EDTA on the carbon paste electrode surface, the nitrate reduction is almost impossible. The reduction of nitra...

Exposure to a large amount of lead causes spontaneous abortions in women and oligospermia (the decrease in the number of spermatozoa in men) [1]. Acute exposure to lead induces renal damage, brain damage, while chronic exposure may have adverse effects on the blood, central nervous system, blood pressure….[2]. For this reason we studied the electro...

We have constructed a carbon graphite electrode modified with an organic molecule (EDTA) in order to detect and quantify ammonium ions (NH4+) in a biological medium (urine). Our study is based on the revelation of the electrochemical behavior of NH4+ ions in an electrolytic medium containing 0.1M NaCl. The methods used for this purpose are: Cyclic...

Voltametric degradation of phenol was carried out at microbial electrode. This electrode is based on graphite carbon and natural phosphate modifed by bacteria inserted in the phosphate matrix, the whole is covered by a polymer developed in situ on the surface. This electrode, designated subsequently by bacteria-NP-CPE, Showed stable response and wa...

The electrochemical behavior of ammonium was investigated at Ethylene Diamine Tetra-Acetic -modified carbon paste electrode (EDTA-CPE) in NaCl solution. A method was developed for the detection of the trace of this product, based on their redox reaction. The redox peaks of ammonium were observed around -0.50 V and 0.50 V (vs. SCE) in cyclic voltamm...

The analytical performance of the EDTA-CPE sensor that is designed for the detection of metals was studied. EDTA plays an important role in the complexation of metal ions because of their good and high response to these ions. The modified electrode EDTA-CPE was used for the voltammetric determination of mercury ions (square wave voltammetry). Sodiu...

The aim of this work is to combine two methods for removing nitrate ions from concentrated aqueous solutions. This involves chelating and then reducing NO3- by EDTE modified carbon paste electrode (EDTA-CPE). We find that in the absence of EDTA on the carbon paste electrode surface, the nitrate reduction is almost impossible. The reduction of nitra...

The swelling ratio and ionic exchange capacity increase from 5% to 8% and 0.7 to 1.2 mg/g, respectively, when the fraction of PAA increases from 0% to 10%. Otherwise, the investigation of MB adsorption onto this membrane shows that the equilibrium time is reached after 48 hours of contact, the intermolecular interactions between both polymer might...

Novelty and Highlights: 1-Polyvinylpyrrolidone-Natural swelling clay film properties were determined and used for electrochemical detection of Lead ions. 2-It demonstrates a good electrocatalytic activity towards the electrochemical detection of lead ions. 3-The electrochemical sensor shows a good and high sensitivity of lead ions complexation.  G...

This work report a Cyclic Voltammetry (CV) and square wave (SQW) methods for the determination of chelating phenol by Moringa oleifera based on carbon paste electrode (CPE) modified with clay. The results showed that the CPE-clay has excellent electrocatalytic activity with Moringa oleifera acting as a chelating agent for phenol. The oxidation peak...

The electrochemical detection of Staphylococcus aureus bacteria by the amoxicillin modified natural phosphate (AMX-Np) is decried. The AMX-NP electrodes were used for the detection of low optical densities of Staphylococcus aureus by using the cyclic voltammetry (cv) and the square waves voltammetry (swv). Some electrochemical properties, in partic...

DNA aggregates were electro less deposited onto carbon paste electrode, firstly and electrode surface was coated by polymer film to protect the DNA film. Prepared electrode has shown great activity towards the oxidation of methanol, and no effect of empoisoning is observed. The effect of various parameters such as scan rate and methanol concentrati...

The aim of this study is the synthesis of ethylcellulose/clays nanocomposites by a very simple approach for an application as an electrocatalytic support of the oxidation of Dopamine. This electrochemical sensor was characterized by X-ray diffraction (XRD), Thermal analysis (TGA/DTA), scanning electron microscopy (SEM) and Transmission Electronic M...

In this work we describe the electrochemical analysis of 4-NA chelation by a modified phosphate carbon paste electrode (NP-CPE) and SEM of the surface both with and without Moringa Oleifera. The electrochemical characteristic of complex Moringa Oleifera - 4-NA was evaluated using cyclic voltammetric (CV) and square wave (SQWV).The optimum potential...