Publications Scientifiques
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Item Application of NaOH-activated peanut shells as a low-cost adsorbent for the removal of cationic dyes(Global NEST, 2025) Hamdache, Farida; Halet, Farid; Bekhti, Saida; Chergui, Abdelmalek; Yeddou, Ahmed Réda; Nadjemi, BoubekeurThe main purpose of this study is to evaluate the possibility of using a lignocellulosic residue, peanut shells after alkaline activation, as a low-cost adsorbent for the removal of methylene blue dye from aqueous solutions. Adsorption experiments were conducted by varying parameters such as the initial pH aqueous solution, contact time, temperature, and initial concentration of adsorbate. Results show that pH has no apparent effect on methylene blue adsorption; more than 95% of methylene blue was removed. The adsorption capacity of methylene blue was slightly improved when the particle size of the adsorbent and the temperature decreased. A temperature uptake from 298 K to 328 K induced a decrease in the percentage of methylene blue removal from 91.36% to 84.31%. The kinetic data obtained at different concentrations were analyzed using pseudo-first-order and pseudo-second-order kinetic models. Also, the modeling of isotherm was considered by applying Langmuir, Freundlich, and Temkin models. Kinetic and equilibrium data were best represented by pseudo-second-order and Langmuir models respectively according to determination coefficient R2 and error function values. The ultimate adsorption capacity reached approximately 100 mg/g. Thermodynamics findings revealed that the adsorption proposed is exothermic and spontaneous process. These results show that peanut shells can be a potential adsorbent for organic dyes removal from aqueous solutionsItem Modeling of adsorption isotherms of methylene blue by olive stones(Aljest, 2015) Abed, F.; Babakhouya, N.; Boughrara, S.The present study focuses on the recovery of the waste food « the olive stones » in the field of industrial liquid effluent treatment. The material is used in its native form. In order to test the performances of the adsorbent we were interested in cationic dye the methylene blue considered as pollutant. The effects of several parameters such as contact times, initial concentration of dye, solution and pH were studied in batch system. Modeling of experimental results was performed using models of Langmuir and Freundlich isotherms, which show that adsorption follows the Langmuir model with high correlation coefficientsItem Experimental investigation of activated carbon prepared from apricot stones material (ASM) adsorbent for removal of malachite green (MG) from aqueous solution(SAGE Publications, 2020) Abbas, MoussaThe adsorption of malachite green onto activated carbon prepared from apricot stones material has been investigated at batch conditions. The effects of contact time (0–60min), initial pH (3–11), agitation speed (100–700 r/min), temperature (298–343K), adsorbent dose (1–10 g/L), and malachite green concentration (4.45–17.6mg/L) on the malachite green adsorption by apricot stones material have been studied. Malachite green removal increases over the contact time until equilibrium. The batch adsorption experiments were carried out to optimize the physical parameters on the malachite green removal efficiency. It has been found that 23.80mg/g at 25 C and 88.05mg/g at 70 C were removed. The kinetic parameters, rate constants and equilibrium adsorption capacities, were calculated and discussed for each kinetic model. The adsorption of malachite green onto apricot stones material is well described by the pseudo second-order equation. The experimental isotherm data were analyzed by different models; the adsorption follows the Langmuir model, providing a better fit of the equilibrium data. The thermodynamics parameters such as the negative free energy DG ( 0.191 to 4.447 kJ/mol) and positive enthalpy DH (50.86 kJ/mol) indicated the spontaneous and endothermic nature of the malachite green adsorption with a chemisorption processItem 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 Synthesis and Characterization of Algeria Organo clays used for Elimination of Phosphate Anions from Aqueous Solution(Aljest, 2020) Bandou, S.; Amrani, M.; Bouras, O.This study is based on synthesis and characterization of three different clays (Sodic-bentonite noted 𝑁𝑎−𝐵𝑡 , Dialyl Dimethyl Ammonium Chloride-bentonite noted 𝐷𝐷𝑀𝐴−𝐵𝑡 and bentonite intercalated by Hexadecyl Trimethyl Ammonium Bromide or 𝐻𝐷𝑇𝑀𝐴−𝐵𝑡 .These three clay complexes were characterized by both 𝑋𝑟𝑎𝑦 diffraction (𝑋𝑅𝐷) and Fluorescence (𝑋𝑅𝐹)Scanning Electron Microscopy (𝑆𝐸𝑀), Fourier transform infrared spectroscopy (𝐹𝑇𝐼𝑅),textural measurements (𝐵𝐸𝑇 specific surface areas and porosities) and the cationic exchange capacity (𝐶𝐸𝐶). Corresponding obtained results confirm the good intercalation of the 𝑁𝑎−𝐵𝑡 by the two used surfactants at low concentrations ( 0.006𝑀 for 𝐻𝐷𝑇𝑀𝐴𝐵 and 0.007𝑀for 𝐷𝐷𝑀𝐴+). Obtained results give basal spacing values around 14.5 and 18.5𝐴 , respectively for verified two aims firstly: The originality of this research, secondly for minimized the production cost of the adsorbents. Adsorption kinetic study of phosphate ions (𝑃𝑂43−) on these three matrices was carried out using kinetic models of pseudo-first, pseudo-second-order and intraparticular diffusion. Results obtained at the studied conditions (room temperature 𝑇=25𝑜𝐶 ), ( acidic medium 𝑝𝐻=5.7) show clearly the good validity of the pseudo-second-order model which gives a better correlation coefficient both, for 𝐷𝐷𝑀𝐴−𝐵𝑡 (𝑅2=0.995) and 𝐻𝐷𝑇𝑀𝐴−𝐵𝑡 (𝑅2=0.999) compared to that obtained by 𝑁𝑎−𝐵𝑡 (𝑅2=0.990)The aim of this present study was to evaluate the feasibility of using chicken eggshells as low-cost biosorbentfor nickel(II) ions adsorption from aqueous solutions. In order to clarify the adsorption process, batch experiments were performed to study the effect of operating parameters such asbiosorbent dose (1-10 g/L), initial concentration of nickel ions (10-50 mg/L), contact time (5-120 min) and temperature (20-50 °C). To describe the adsorption equilibrium, the experimental data were analyzed by the Langmuir, Freundlich and Temkin isotherm models. The Freundlich model showed better representation of data (R2> 0.999).The maximum adsorption capacity Adsorption isotherms give adsorbed amounts of about 33 and 63 𝑚𝑔.𝑔−1 onto 𝐷𝐷𝑀𝐴−𝐵𝑡 𝐻𝐷𝐷𝑀𝐴−𝐵𝑡 complexes, respectively, and 14 𝑚𝑔.𝑔−1for 𝑁𝑎−𝐵𝑡 as reference adsorbent. These results indicated the adsorption of phosphate anions (𝑃𝑂43−) by the twoItem Adsorption of the Coomassie Brilliant Blue (BBC) onto apricot stone activated carbon : kinetic and thermodynamic study(Elsevier, 2014) Kaddour, Samia; Abbas, Moussa; Aksil, Tounsia; Cherfi, AbdelhamidItem Adsorption of malachite green (MG) onto apricot stone activated Carbon (ASAC)-Equilibrium, kinetic and thermodynamic studies(2017) Abbas, Moussa; Aksil, TounsiaThe adsorption of malachite green (MG) onto apricot stone activated carbon (ASAC) in a batch adsorber and the effects of contact time, initial pH, agitation speed, adsorbent dosage and initial dye concentration on the MG adsorption by the ASAC have been studied. It was observed that under optimized conditions up to 23.94 mg/g at 25 oC and 88.5 mg/g at 70 oC could be removed from solution. Kinetic parameters; rate constants, equilibrium adsorptin capacities and correlation coefficients, for each kinetic equation were calculated and discussed. It was shown that the adsorption of MG onto ASAC could be described by the pseudo second-order equation. The experimental isotherm data were analyzed using the Langmuir, Freundlich, Temkin, Elovich and Redlich-Peterson equations. Adsorption of MG onto ASAC followed the Langmuir isotherm. The evaluation of thermodynamics parameters such as the negative Gibbs free energy and positive enthalpy change indicated respectively the spontaneous and endothermic nature of the reaction and the chimisorption of the sorption processItem A kinetics, isotherms, and thermodynamic study of diclofenac adsorption using activated carbon prepared from olive stones(2017) Cherik, Dalila; Louhab, KrimItem 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 Potential of sawdust materials for the removal of dyes and heavy metals : examination of isotherms and kinetics(Taylor and Francis, 2016) Sahmoune, Mohamed Nasser; Yeddou, Ahmed Reda