Publications Internationales
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Item AI-driven optimization of Congo red photo degradation using the spinel CdCr₂O₄ photocatalyst: From sol-gel synthesis to DT_LSBOOST predictive modeling coupled with the dragonfly algorithm(Elsevier, 2025) Chelabi, Kahina; Bouallouche, Rachida; Nasrallah, Noureddine; Boudraa, Reguia; Merzeg, Farid Ait; Djermoune, Atmane; Amrane, Abdeltif; Tahraoui, HichemIn this study, a nanostructure CdCr₂O₄ spinel photocatalyst was successfully synthesized via a low-cost sol–gel combustion route and thoroughly characterized by XRD, TGA-DTA, SEM-EDS, FTIR, and UV–Vis spectroscopy. The catalyst exhibited a well-defined spinel structure, high crystallinity, and nanometric grain size (∼29 nm), with strong visible-light absorption (band gap ≈ 1.97 eV). Photocatalytic performance was evaluated using Congo red (CR) as a model pollutant under visible LED light. Optimal degradation conditions (pH 6, [CR] ₀ = 10 mg/L, 1 g/L catalyst, 150 min) led to an outstanding removal efficiency of 98.45 %, with a kinetic constant of 2.11 × 10−2 min−1. Mechanistic studies revealed that hydroxyl (•OH) and superoxide (•O₂−) radicals played dominant roles in the degradation process. To model and optimize the system, a hybrid machine learning approach combining Decision Tree with Least Squares Boosting (DT_LSBOOST), optimized using the Dragonfly algorithm, was implemented. The model demonstrated excellent prediction accuracy (R = 0.9998, RMSE = 0.66) and successfully identified optimal operating conditions with <1 % deviation from experimental results. Stability and reusability tests confirmed the photocatalyst retained >90 % efficiency after five successive cycles, with no significant structural degradation. Compared to state-of-the-art materials, CdCr₂O₄ proved highly competitive in visible-light-driven photocatalysis, establishing its suitability for advanced wastewater treatment applicationsItem Characterization of cardinal vine shoot waste as new resource of lignocellulosic biomass and valorization into value-added chemical using Plackett–Burman and Box Behnken(Springer, 2021) Didaoui, Amine; Amrane, Abdeltif; Aksil, Tounsia; Boubieb, NaimaThe objective of this work was to valorize a waste from cardinal vine shoot into a hydrolysate rich in reducing sugars. Plack- ett–Burman design was considered to identify the significant factors, while a Box Behnken design was considered to optimize the extraction in the following experimental conditions: 100 °C, 750 rpm, trifluoracetic acid (CF 3 O 2 H) concentration (TFA) in the range (1–10%), for 20 to 180 min and considering the following solid–liquid (S/V) ratios (1:1, 3:1, 5:1). The optimal result was 2.53% in sugars equivalent to a yield of 50.64% per gram of dry matter. Shoot vine waste was characterized by attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD), simultaneous thermal analysis (STA), and X-ray fluorescence (XRF). The chemical composition was 43.38% cellulose, 23.58% hemicel- lulose, 21.22% lignin, 2.53% ash, 5.82% crude protein, 11.7% moisture, and extractives (0.81% fat, 0.56% total sugars, 2.3% extractive (hexane-ethanol)). The promising potential of shoot vine waste to produce sugar and other added-value compounds was demonstrated.Item Correction to: characterization of cardinal vine shoot waste as new resource of lignocellulosic biomass and valorization into value-added chemical using Plackett–Burman and Box Behnken(Springer Nature, 2023) Didaoui, Amine; Amrane, Abdeltif; Aksil, Tounsia; Boubieb, NaimaThe objective of this work was to valorize a waste from cardinal vine shoot into a hydrolysate rich in reducing sugars. Plackett–Burman design was considered to identify the significant factors, while a Box Behnken design was considered to optimize the extraction in the following experimental conditions: 100 °C, 750 rpm, trifluoracetic acid (CF3O2H) concentration (TFA) in the range (1–10%), for 20 to 180 min and considering the following solid–liquid (S/V) ratios (1:1, 3:1, 5:1). The optimal result was 2.53% in sugars equivalent to a yield of 50.64% per gram of dry matter. Shoot vine waste was characterized by attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD), simultaneous thermal analysis (STA), and X-ray fluorescence (XRF). The chemical composition was 43.38% cellulose, 23.58% hemicellulose, 21.22% lignin, 2.53% ash, 5.82% crude protein, 11.7% moisture, and extractives (0.81% fat, 0.56% total sugars, 2.3% extractive (hexane-ethanol)). The promising potential of shoot vine waste to produce sugar and other added-value compounds was demonstrated.Item Cuprous ions influence on the biocorrosion of a carbon steel in the presence of sulphate reducing bacteria marine biofilm(Elsevier, 2024) Belkaid, Souad; Mansour, Dalila; Salah, Farida Laadjal; Amrane, AbdeltifThe influence of marine sulphate reducing bacteria (SRB) biofilm on naval carbon steel corrosion in seawater was studied in the presence or not of cuprous ions as polluting agent. The optical density measurement showed that a concentration of 15 mg L−1 in cuprous ions can cause a significant slowdown in the proliferation of planktonic bacteria. However, electrochemical impedance results indicated that there was still bacterial activity on the metal substrate. Indeed, biofilm was grown on the surface of material in seawater containing SRB. Initially, an increase in the charge transfer resistance values due to the iron sulphide layer formed by the bacteria precipitation reactions was recorded during growth phase. This film acts as a barrier, preventing further oxidation of the underlying metal; then, the localized breakdown of iron sulphide layer generates an acceleration of corrosion. Similar behaviour occurs in the presence of sulphate reducing bacteria flora with 15 mg L−1 cuprous ions. In order to protect themselves when the seawater media containing toxic metals, sulphate reducing bacteria embed into clusters and increase the production of extracellular polymeric substances on materials. Sulphur was present on specimens in both cases and EDS spectra revealed the formation of iron sulphide. After the removal of biofilm, carbon steel surfaces exhibited a plenty of micropits scattered on the entire surface compared to the surface immersed in the seawater without bacteriaItem Optimization of partially hydrolyzed polyacrylamide (HPAM) utilized in water-based mud while drilling(MDPI, 2023) Sid, Asma Nour El Houda; Kouini, Benalia; Bezzekhami, Mohammed Amin; Toumi, Selma; Ouchak, Khadidja; Benfarhat, Sara; Tahraoui, Hichem; Kebir, Mohammed; Amrane, Abdeltif; Assadi, Aymen Amine; Zhang, Jie; Mouni, LotfiWater-soluble polymers are becoming increasingly important in various applications, such as stabilizer fluids and drilling muds. These materials are used as viscosifiers and filtration control agents, flocculants, and deflocculants due to their superior properties in increasing viscosity and gelling ability in the presence of crosslinkers. In general, studying the rheological behavior of drilling fluids is of paramount importance to ensure successful well drilling operations. Partially hydrolyzed polyacrylamide is one of the polymers widely used in water-based muds. The main objective of this study is to optimize the rheological properties of drilling muds through a characterization study of various parameters, including rheological behavior, viscosity, temperature (23 °C, 40 °C, and 60 °C), salinity using KCl and NaCl contents, aging, pH, solubility, and structural analysis using infrared of partially hydrolyzed polyacrylamide. The study aims to demonstrate the importance of using polymers in drilling muds. The findings revealed that a rate of 3% of HPAM gave better rheological behavior, the influence of KCl (1.5%, 3%, and 4.5%) was greater than that of NaCl (1.5%, 3%, and 4.5%) on polymers, and the aging test showed that the different formulations are stable and maintain their behavior up to 110 °C. The solubility test results confirmed the maximum amount absorbed by polyacrylamide ([CHPAM] = 66.42 g/L) in order to avoid aggregation, gelification, and enhance the drilling mud by utilizing the prescribed contentsItem Comparative investigation of the effect of eggshellpowder and calcium carbonate as additivesin Eco-Friendly polymer drilling fluids(MDPI, 2023) Sid, Asma Nour El Houda; Tahraoui, Hichem; Kebir, Mohammed; Bezzekhami, Mohammed Amin; Kouini, Benalia; Hassein-Bey, Amel Hind; Toumi, Selma; Amrane, Abdeltif; Imessaoudene, AliDrilling fluid systems have seen the addition of new natural additives in recent years in order to replace traditional additives, improve their rheological properties, and ensure the functionality of the drilling fluid taking into account health and environmental factors. This paper aims to study and compare the effect of the addition of eggshell powder (ESP) as a native and local additive and calcium carbonate (CC) as a traditional and conventional additive on the rheological and filtration properties of the drilling fluid system based on Na-bentonite of the region of Meghnia (Algeria). The test results of 10, 20, and 30 g of CCwerecompared to the same concentrations of ESP.The findings showed that the CC with various concentrations (10, 20, and 30 g) increases the rheological properties and the mud density while it reduces the filter cake and the fluid loss values which are desirable, calcium carbonate had aslightly higher effect on the pH. The obtained results following the addition of ESP with different ratios revealed that the latter has a considerable impact on the plastic viscosity, the yield point, the gel strength, and the cake thickness. Additionally, the effect of the presence of eggshell as an additive in pH, fluid loss, and mud density was studied; we observed a slight increase in the pH, while the fluid loss values decreased. However, the mud density values increased. Beyond 20 g of eggshell, the properties of the mud becomeundesirable. Moreover, this study contributes tonewfindings and suggests that the utilization of waste food and local goods in drilling mud mixtures has a bright future respecting the percentages of use