Publications Scientifiques
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Item Electrocatalytic activity survey of some cathode materials for the reduction of nitrites and nitrates in aqueous solution(Publishing House of the Romanian Academy, 2020) Angar, Yassmina; Daoudi, Sofiane; Kebbouche-Gana, Salima; Djelali, Nacer-EddineThe electrochemical techniques are the subject of increasing interest on the environmental remediation methods thanks to their efficiency and their selectivity. It was classified among the cleanest methods because it does not produce sludge and undesirable intermediate byproducts. For these reasons, we have chosen this technology for the reduction of nitrites and nitrates ions from aqueous solutions. The objective of our study is the comparison of several cathodes materials performances, in order to promote an optimal electro-reduction of these ions. Indeed, we have used the copper, graphite, stainless steel and zinc as cathodes; among them, we have selected the most efficient on which we have optimized the operational conditions. The results suggested that the copper cathode was the most efficient for the reduction of both tested ions compared to the other tested materials. Therefore, the optimization of operational conditions allows us to fixed them at: scan rate=50 mV/s, initial effluent concentration=100 mg/L, pH=7 and potential range of the cyclic voltammetry scanning of [-1,+1]V/SCE for both ions. Under these optimal parameters, the reduction yield after 45min was important that can achieve 96.5% and 99% for nitrites and nitrates respectivelyItem A Comprehensive Study on Crude Methanolic Extract of Daphne gnidium L. as Effective Corrosion Inhibitors of Mild Steel Induced by SRB Consortium(Springer, 2019) Djouahra-Fahem, Djamila; Angar, Yassmina; Lamine Mohamed, Gana; Khoukhi, Faiza; Kebbouche-Gana, SalimaThe aim of the present work is the evaluation of effect of methanolic extract obtained from Daphne gnidium against biocorrosion caused by sulphate-reducing bacteria (SRB). Herein, the study of the influence of SRB consortium has been realized on the biological and electrochemical properties of the carbon steel API5LX60 immersed in water sample obtained from an Algerian oil field separator. The monitoring of the treatment effects on the SRB performance using kits test and weight loss methods showed a positive effect of the methanolic extract of D. gnidium as a corrosion inhibitor at a concentration of 0.8 g/L. In the other hand, the weight loss test has generated an efficiency rate of 95.99% at a concentration of 1.6 g/L. A linear polarization resistance approved these results, and they have given a yield of 91.14% with a polarization resistance value of 28.9 kΩ cm2 at a concentration of 0.25 g/L.Item Kinetic and thermodynamic studies of the ammonium ions adsorption onto natural Algerian bentonite(Taylor & Francis, 2016) Angar, Yassmina; Djelali, Nacer-Eddine; Kebbouche-Gana, SalimaAdsorption processes are the most recommended complementary techniques applied in the wastewater treatment owing to their low economic cost, recyclability, efficiency and low power consumption. Clays known for this treatment are aluminosilicate minerals which contain different exchangeable ions on their surfaces. In the structure of bentonite surface, several cations have the exchange ability such as calcium, sodium, magnesium and potassium. This propriety is responsible for the adsorption of several cationic water pollutants. In this study, natural bentonite particles of 80 μm in diameter were considered and kept stirring at 200 RPM in a contaminated solution with ammonium ions. The effect of contact time and temperature showed that at an optimal temperature of 30°C and during a short stirring time of 50 min, the removal efficiency could reach its maximum of 53.36%. The kinetic study of the ammonium adsorption reaction on natural bentonite allowed concluding that the reaction is obeyed to the first-order model. Determination of various thermodynamic parameters suggests that the reaction is spontaneous and exothermicItem Contribution to the study of the ammonium electro-oxidation in aqueous solution(Taylor & Francis, 2017) Angar, Yassmina; Djelali, Nacer-Eddine; Kebbouche-Gana, SalimaItem Investigation of ammonium adsorption on Algerian natural bentonite(Springer, 2016) Angar, Yassmina; Djelali, Nacer-Eddine; Kebbouche-Gana, SalimaItem Study of the effect of the bentonite modification treatments on the adsorption removal of ammonium ions from aqueous solution(2016) Angar, Yassmina; Djelali, Nacer-Eddine; Kebbouche-Gana, SalimaItem Removal of nitrates in wastewaters(2016) Angar, Yassmina; Djelali, Nacer-Eddine; Kebbouche-Gana, SalimaItem Influence of the anode nature in the ammonium electro-oxidation(2015) Angar, Yassmina; Djelali, Nacer-EddineItem Novel approach for the ammonium removal by simultaneous heterotrophic nitrification and denitrification using a novel bacterial species co-culture(Springer, 2016) Angar, Yassmina; Kebbouche-Gana, Salima; Djelali, Nacer-Eddine; Khemili-Talbi, SouadItem Comparison of biological nitrate reduction effectiveness of two strains isolated from activated sludge(Chemical Publishing, 2016) Angar, Yassmina; Kebbouche-Gana, Salima; Djelali, Nacer-Eddine