Publications Internationales
Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/13
Browse
14 results
Search Results
Item Removal of Amoxicillin From Wastewater Onto Activated Carbon: Optimization of Analytical Parameters by Response Surface Methodology(SAGE Publications Inc., 2024) Abbas, Moussa; Trari, MohamedAntibiotics are widely used in veterinary and human medicine, but these compounds, when released into the aquatic environment, present potential risks to living organisms. In the present study, the activated carbon (AC) used for their removals is characterized by FT-IR spectroscopy, BET analysis and Scanning Electron Microscopy (SEM) to determine the physicochemical characteristics. Response surface methodology (RSM) and Box-Behnken statistical design (BBD) were used to optimize important parameters including pH (2-12), temperature (20-45°C), and AC dose (0.05-0.20 g). The experimental data were analyzed by analysis of variance (ANOVA) and fitted to second-order polynomial using multiple regression analysis. The optimal conditions for maximum elimination of Amoxicillin (Amox) are (Dose: 0.124 g, pH 5.03 and 45°C) by applying the desirability function (df). A confirmation experiment was carried out to evaluate the accuracy of the optimization model and maximum removal efficiency (R = 89.999%) was obtained under the optimized conditions. Several error analysis equations were used to measure goodness of fit. Pareto analysis suggests the importance of the relative order of factors: pH > Temperature > AC dose in optimized situations. The equilibrium adsorption data of Amox on Activated Carbone were analyzed by Freundlich, Elovich, Temkin and Langmuir models. The latter gave the best correlation with qmax capacities of 142.85 mg/g (R2 = 0.999) at 25°C is removed from solution. The adsorption process is dominated by chemisorption and the kinetic model obeys a pseudo-second order model (R2 = 0.999).Item Potential of titanium dioxide to remove bromothymol blue (BTB) in aqueous solution by batch mode Adsorption–Kinetic, isotherm and thermodynamic studies(Springer, 2023) Abbas, MoussaThe adsorption is widely used to remove certain classes of pollutants from water, especially those that are hardly biodegradable and dyes represent one of these problematic groups. The removal of bromothymol blue (BTB) from wastewater using TiO2 was studied in batch system. The adsorbent TiO2 has a specific surface area of 400 m2/g, a mean crystallites sizes (5–10 nm), and pHpzc equal to 6.5. TiO2 is stable over the whole pH range and constitutes a good compromise between efficiency and stability (in both acidic and basic media), therefore, the use of other additives is not necessary. Its non-toxicity and low energy required for its activation (E ~ 3 eV) as well as its low cost for most of the applications envisaged make it advantageous. The influence of effective variables such as solution pH (1–10), contact time (0–60 min), initial BTB concentration (5–40 mg/l), adsorbent dose of TiO2 (0.2–2 g/l), and temperature (20–60 °C) on the adsorption efficiency was examined, while the BTB content was determined by UV–Vis spectrophotometry. The optimal pH, adsorbent dose, and contact time for the efficient removal were found to be 10, 0.2 g/l, and 30 min, respectively, and the adsorbent was characterized by the BET analysis and point of zero charge (pHpzc). Among the different kinetic models, the experimental data of the BTB removal are well fitted with the pseudo-first-order kinetic model with a high determination coefficient. The evaluation of the fitness of equilibrium data by various conventional isotherm models, based on the R2 value as criterion, show the successful applicability of the Langmuir model for the interpretation of experimental data with a maximum adsorption capacity (qmax) of 27.02 mg/g at 20 °C and R2 of 0.997. The adsorption isotherms at different temperatures have been used for the determination of the free energy (ΔGo = 2.1808 to—1.0981 kJ/mol), enthalpy (ΔHo = 20.74 kJ/mol), and entropy (ΔSo = 65.58 J/mol/K) indicate that the overall adsorption is spontaneous and endothermic in natureItem Thermodynamic and kinetics studies on adsorption of Indigo Carmine from aqueous solution by activated carbon(Elsevier, 2019) Harrache, Zahia; Abbas, Moussa; Aksil, Tounsia; Trarib, MohamedThe kinetic and equilibrium parameters of the quantitative adsorption for Indigo Carmine (IC) removed by commercial activated carbon (AC) were studied by UV–visible absorption spectroscopy. AC with a high specific surface area (1250.320 m2/g) was characterized by the Brunauer–Emmett–Teller (BET) method and point of zero charge (pzc). The effect of the initial dye concentration (10–60 mg/L), contact time (0–90 min), pH (1−12), agitation speed (0–600 rpm), adsorbent dose (1–10 g/L) and temperature (298–323 K) were determined to find the optimal conditions for a maximum adsorption. The adsorption mechanism of Indigo Carmine onto AC was studied using the first pseudo order, second pseudo order and Elovich kinetics models. The adsorptions kinetic were found to follow a pseudo second order kinetic model with a determination coefficient (R2) of 0.999. To get an idea on the adsorption mechanism, we applied the Webber-Morris diffusion model. The equilibrium adsorption data for Indigo Carmine on AC were analyzed by the Langmuir, Freundlich, Elovich, Dubinin and Temkin models. The results indicate that the Langmuir model provides the best correlation at 25 °C (qmax = 79.49 mg/g) and Dubinin at 40 °C (qmax = 298.34 mg/g). The adsorption isotherms at different temperatures have been used for the determination of thermodynamic parameters such as free energy (ΔG° = −0.071 to −1.050 kJ/mol), enthalpy (ΔH° = 28.11 kJ/mol), entropy (ΔS° = 0.093 kJ/mol·K) and activation energy (Ea) of 51.06 kJ/mol of adsorption. The negative ΔG° and positive ΔH° values indicate that the overall adsorption is spontaneous and endothermic.Item Adsorption of methyl green (MG) in aqueous solution by titanium dioxide (TiO2) : kinetics and thermodynamic study(Springer, 2021) Abbas, MoussaAdsorption techniques are widely used to remove certain classes of pollutants from waters, especially those that are not easily biodegradable. In this respect, the removal of Methyl green (MG) from waste water using TiO2 was studied in batch system. This research was carried out to evaluate the capability of TiO2 toward the water treatment relevant to organic MG at batch conditions. The effects of contact time (0–60 min), initial pH (3–11), agitation speed (100–500 rpm), temperature (25–45 °C), adsorbent dosage (0.02–6 g/L), and MG concentration (50–200 mg/L) on the MG adsorption by TiO2 have been studied. The adsorption kinetics in view of four kinetic models, i.e., the pseudo-first-order Lagergren, pseudo-second-order, intra-particle diffusion and Elovich models, was discussed. The adsorption of MG is well described by the pseudo-second-order equation with the best determination coefficient (R2 = 0.999). The experimental isotherm data were analyzed by different models; the adsorption follows the Langmuir and Temkin models, providing a better fit of the equilibrium data. The batch adsorption experiments were carried out to optimize the physical parameters on the MG removal efficiency, and it has been found that 384.615 mg/g at 25 °C is removed. The positive value of the activation energy (Ea = 14.1813 kJ/mol) indicates the endothermic nature and clearly that the randomness is increased at the solid–solution interface during the MG adsorption onto TiO2, indicating that some structural exchange occurs among the active sites of the adsorbent and the MG speciesItem Mass transfer processes in the adsorption of Lead (Pb2+) by apricot stone activated carbon (ASAC) : isotherms modeling and thermodynamic study(Springer, 2021) Abbas, MoussaIn the present study, batch experiments were carried out to elucidate the potential of apricot stone activated carbon ASAC to remove Pb2+ ions from aqueous solution. ASAC was characterized by Bruanauer, Emmett and Teller surface area S = 80.08 (m2/g), Fourier transform infrared spectroscopy and scanning electron microscopy. The effects of various process parameters such as initial pH (2–14), adsorbent dose (5–45 g/L) initial metal ion concentration (20–0 mg/L), contact time (0–90 min), agitation speed (100–700 rpm) and temperature (298–323 k) were investigated in their respective range and their optimum conditions were ascertained. The adsorption kinetics were analyzed by the pseudo-first-order, pseudo-second-order, Elovich and intraparticle diffusion kinetic models. It was found that the adsorption of the metal ions followed pseudo-second-order kinetic model. The Adsorption isotherms were modeled with Langmuir, Freundlich, Temkin, Hasley and Harkins models and their isotherm constants were calculated. The Freundlich model fits the data with a monolayer adsorption capacity of 166.813 mg/g at pH 8. The thermodynamic parameters such as the Gibbs free energy, enthalpy and entropy were calculated to predict the nature of adsorption process. The calculated thermodynamic parameters showed that the adsorption of Pb2+ ions on ASAC is endothermic (ΔH0 = 121.38 kJ/mol) and not spontaneous (ΔG0 > 0) in natureItem Removal of toxic methyl green (Mg) in aqueous solutions by apricot stone activated carbon – equilibrium and isotherms modeling(Taylor & Francis, 2018) Abbas, Moussa; Aksil, Tounsia; Trari, MohamedApricot stone activated carbon (ASAC), was powdered, activated and to be used as effective adsor-bent to remove the dyes from aqueous solutions through batch experiments under operational factors namely, pH, contact time, adsorbent dose, initial dyes concentration and temperature. The physico-chemical, morphological and structural properties of the adsorbents were characterized by scan-ning electron microscope (SEM) and X-ray diffraction (XRD) instruments. Different kinetic modelsindicated that the adsorption is well described by the pseudo-second order model. The isotherms of methyl green (MG) adsorption on ASAC were obtained and correlated with various models. The smaller RMSE values for the Langmuir and Dubinin-Radushkevic models indicated the best fitting; the mono layer adsorption capacity of MG was found to be 148.478 mg g–1 at 21°C and 88.11 mg g–1 at 46°C at pH 10. The thermodynamic functions showed spontaneous and endothermic MG adsorption. In conclusion, the adsorbent prepared from apricot stone (ASAC) was found to very effective and suitable adsorbent for reactive dyes removal from aquatic environment, due to its simple and cheap preparation, easy availability and good adsorption capacity.Item Removal of gentian violet in aqueous solution by activated carbon equilibrium, kinetics, and thermodynamic study(SAGE Publications, 2019) Abbas, Moussa; Harrache, Zahia; Trari, MohamedThe quantitative kinetic and equilibrium adsorption parameters for chlorure de méthylrosaniline (gentian violet, crystal violet) removed by commercial activated carbon were studied by UV–visible spectroscopy.Activated carbon with a high specific surface area 1250 m2/g was characterized by the Brunauer, Emmett et Teller (BET) method and the zero charge point pH (pzc). The adsorption properties of both activated carbon with gentian violet were conducted at variable stirring speed 100–700 trs/min, adsorbent dose 1–8 g/l, solution pH 1–14, initial gentian violet concentration 5–15 mg/l, contact time 0–50 min, and temperature 299–323 K using batch mode operation to find the optimal conditions for a maximum adsorption. The adsorption mechanism of gentian violet was studied using the pseudo-first-order, pseudo-second-order, and Elovich kinetic models. The adsorption kinetics was found to follow a pseudo-second-order kinetic model with a determination coefficient (R2) of 0.999. The Weber–Morris diffusion model was applied for the adsorption mechanism. The equilibrium adsorption data of gentian violet were analyzed by the Langmuir, Freundlich, Elovich, and Temkin models. The results indicate that the Langmuir model provides the best correlation (qmax = 22.727, 32.258 mg/g at 26 and 40°C, respectively). The adsorption isotherms at different temperatures have been used for the determination of thermodynamic parameters, i.e. free energy (ΔG° = − 2.30 to −5.34 kJ/mol), enthalpy (ΔH° = 36.966 kJ/mol), entropy (ΔS° = 0.131 kJ/mol K), and activation energy (Ea) 40.208 kJ/mol of gentian violet adsorption. The negative ΔG° and positive ΔH° indicate that the overall adsorption is spontaneous and endothermic in natureItem Performance of mixed mesoporous silica Si (Mes)-perovskite (P) to remove hydroxybenzene in aqueous solution-effect of parameters influencing the adsorption efficiency(Balaban Publishers – Desalination Publications, 2020) Abbas, Moussa; Aksil, Tounsia; Trari, Mohamed* Corresponding author.1944-3994/1944-3986 © 2020 Desalination Publications. All rights reserved.Desalination and Water Treatmentwww.deswater.comdoi: 10.5004/dwt.2020.26157202 (2020) 306–316OctoberPerformance of mixed mesoporous silica Si(Mes)-perovskite (P) to remove hydroxybenzene in aqueous solution — effect of parameters influencing the adsorption efficiencyMoussa Abbasa,*, Tounsia Aksila, Mohamed TraribaLaboratory of Soft Technologies and Biodiversity, Faculty of Sciences, University M’hamed Bougara, Boumerdes 35000, Algeria, Tel. +213 552408419; Fax: +213 21 24 80 08; emails: moussaiap@gmail.com (M. Abbas), tounsiaiap@gmail.com (T. Aksil) bLaboratory of Storage and Valorization of Renewable Energies, Faculty of Chemistry (USTHB), BP 32-16111 Algiers, Algeria, email: mtrari@usthb.dz (M. Trari)Received 1 December 2019; Accepted 25 May 2020abstractMesopores are materials with pore diameters between 2 and 50 nm, are used in several fields such as catalysis, chromatography, adsorption, etc. This study focuses on the potential use of mesoporous Si(Mes) and perovskite (P) as adsorbents, their ability to remove hydroxybenzene from aqueous solutions and the possibilities of elimination of a certain class of phenolic compounds, whose chem-ical structures of which contain functions capable of interacting on the surface of the supports. The adsorbent was characterized by Brunauer–Emmett–Teller, Fourier-transform infrared spectros-copy and X-ray diffraction methods. Batch adsorption experiments were undertaken to assess the effect of physical parameters on the hydroxybenzene removal efficiency. It has been observed that under optimized conditions (pH 4; adsorbent dose 1 g L–1; agitation speed 200 rpm; contact time 90 min); up qmax of 4.210 g of hydroxybenzene/g adsorbent at 25°C were removed from the solution. The adsorption by the adsorbent follows a pseudo-second-order kinetic model with a determina-tion coefficient (R2) of 0.999; which relies on the assumption that the physisorption may be the rate-limiting step. The adsorption at different temperatures has been used for the determination of thermodynamic parameters, the negative free energy (ΔG°) and positive enthalpy (ΔH°) indicate that the overall adsorption is spontaneous and endothermic, while the negative value (ΔS°) states clearly that the randomness increases at the solid-solution interface during the phenol adsorption onto Si(Mes)-(P), indicating that some structural exchange may occur among the active sites of the adsorbent and the ionsItem 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 Modeling of adsorption isotherms of (5, 5' disodium indigo sulfonate) from aqueous solution onto activated carbon : equilibrium, thermodynamic studies, and error analysis(Taylor & Francis, 2019) Harrache, Zahia; Abbas, Moussa; Aksil, Tounsia; Trari, Mohamed