Browsing by Author "Babakhouya, Naouel"

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Adsorption of CD(II) ions from aqueous solution using mixed sorbents prepared from olive stone and date Pit
(Asian network for scientific information, 2010) Babakhouya, Naouel; Aksas, Hammouche; Boughrara, S.; Louhab, K.
The aim of this study is to remove Cd(II) ions from aqueous solutions by adsorption. Mixed sorbent prepared from olive stone and date pit, an agricultural solid by-product was used as adsorbent. The adsorption experiments of Cd(II) onto the mixture of olive stone and date pit were conducted at different parameters such as, percent of olive stone and date pit in the mixture, temperature, initial solution pH and initial Cd(II) concentration. Adsorption isotherms were obtained at different percent of olive stone and date pit in the mixture. This adsorption data was fitted with the Langmuir, Freundlich and Temkin isotherms. The thermodynamic of Cadmium sorption on the mixed sorbent follows the Langmuir model and the sorption capacity for cadmium increases when we add a small amount of olive stone at date pits (90% of date pits in mixture and 10% of olive stone) and a small amount of date pits at olive stone (90% of olive stone and 10% of date pits in mixture. In addition, the thermodynamic parameters, standard free energy (°G°), standard enthalpy (ΔH°) and standard entropy (ΔS°) of the adsorption process were calculated. The sorption of Cd(II) onto the mixture of olive stones and dates pit is spontaneous and presents an endothermic nature. The characteristics of the mixture were determined by the analysis of infra red spectral analysis. The results show that the mixture sorbent from olive stone and date pit is an alternative low-cost adsorbent for removing Cd(II)
Adsorption of chromium Ions from aqueous solution using mixed sorbents prepared from olive stone and date pit
(Ebscohost, 2012) Aksas, Hammouche; Babakhouya, Naouel; Babaci, Hakima; Feggas, R.; Louhab, K.
The aim of this study is to remove chromium ions from aqueous solutions by adsorption. Mixed sorbent prepared from olive stone and date pit, an agricultural solid by-product was used as adsorbent. The adsorption experiments of Cr onto the mixture of olive stone and date pit were conducted at different parameters such as, per cent of olive stone and date pit in the mixture, temperature, initial solution pH and initial chromium concentration. Adsorption isotherms were obtained at different per cent of olive stone and date pit in the mixture. This adsorption data was fitted with the Langmuir, Freundlich and Temkin isotherms. In addition, the thermodynamic parameters, standard free energy (ΔG°), standartd enthalpy (ΔH°) and standard entropy (ΔS°) of the adsorption process were calculated. The results show that the mixture sorbent from olive stone and date pit is an alternative low-cost adsorbent for removing chromium ions
By-product Eucalyptus leaves valorization in the basic dye adsorption: kinetic equilibrium and thermodynamic study
(Walter de Gruyter GmbH, 2024) Babakhouya, Naouel; Benammar, Souad; Hamitouche, Adh'ya-Eddine; Boudjemaa, Amel; Messaoud-Boureghda, Mohamed-Zine; Bachari, Khaldoun
Algerian Eucalyptus Leaves (AEL), a natural biodegradable adsorbent abundantly available, was used for the removal of methylene blue (MB) dye. The AEL properties for the removal of MB were investigated under different conditions by varying the AEL amount, MB concentration, pH of the solution and the reaction temperature. Scanning electron microscopy (SEM) and infrared spectroscopy (FTIR) techniques have been used to characterize AEL biosorbent. Experimental results showed that the adsorption of MB dye at the concentration of 50 mg L-1 reached to 91 % at pH 10 with a stirring speed of 200 rpm and after 180 min of reaction time. The experimental data were analyzed using the linear forms of different kinetic models (pseudo-first order kinetic model, pseudo-second order kinetic model, and intra-particle diffusion models). The results demonstrated that the adsorption kinetics of MB was consistent with the pseudo-second order model with R 2 value of 0.9969. The isotherm models Langmuir, Freundlich, Dubinin, Elovich, Brunaut Emmet Teller and Temkin models were also investigated to describe the adsorption equilibrium. The results show that the AEL adsorption is in accordance with Temkin isotherm. The thermodynamic study revealed that the adsorption is spontaneous and exothermic. Therefore, as a cheap green adsorbent with high MB adsorption performance, AEL is expected to become one of the best candidate materials for future industrial wastewater treatment.
ELECTROCHEMICAL CHROMIUM (VI) RECOVERY PROCESS BY CONDUCTING COMPOSITE, OLIVE POMACE/PANI
(ACADEMIA ROMÂNĂ, 2019) Babakhouya, Naouel; Abdouni, Mohamed; LOUHAB, Krim
We examined the use of a new conducting composite material which was prepared from olive pomace (OP) and polyaniline, developed and used for the fabrication of electrode, which was then used as substrate for the recovery of chromium hexavalent to an aqueous solution through electrical conductivity tests. We used the spectral analysis techniques such as FT-IR and X-ray diffraction (XRD) to characterize the material as well as Laser Particle Size and scanning electron microscopy (SEM) to show that the PANI was successfully attached to OP. We carried out electrosorption tests in acid medium within an electrochemical cell at a potential of +800 mV imposed and we compared the recovery with chemical adsorption at open circuit under the same conditions. The results demonstrated that the electrosorption of Cr (VI) is superior to the adsorption, which is due to the excellent electrical conductivity and mechanical properties of OP/PANI composite electrode. Through the electrosorption and electrodesorption we studied the possibility of regeneration of our electrode
Etude du potentiel d’utilisation des résidus agroalimentaires pour récupération et adsorption des métaux lourds
(2020) Babakhouya, Naouel
L’objectif de cette étude est l’adaptation d’un déchet naturel lignocellulosique « grignons d’olive » avec les techniques électrochimiques d’élimination des métaux lourds « chrome hexavalent » dans l’eau et la comparaison de cette technique avec l’adsorption chimique. Pour commencer, on a prétraité et broyé les grignons d’olive, puis on a préparé des composites conducteurs de GON/PANI par la technique de polymérisation in-situ à différents pourcentages de PANI et GON. Une série de caractérisation par spectroscopie infra rouge (FTIR), diffraction des rayons X (DRX), Granulométrie laser, microscopie électronique à balayage (MEB-EDX), analyse thermo gravimétrique (ATG/DSC), fluorescence X (FRX) et la conductivité électrique, a été réalisé sur les GON, la PANI et les composites conducteurs, afin de déterminer les fonctions de surface et les composites de meilleurs propriétés. On fonction des résultats obtenus par ces caractérisations, on a choisi le composite qui entre dans la fabrication de l’électrode de travail. Des essais d’adsorption en système batch du Cr (VI) sur les grignons d’olive, la PANI-HCl et les différents composites préparés sous l’effet de plusieurs paramètres tel que le temps de contact, la concentration initiale du chrome hexa valent, et le pH de la solution ont été réalisés. Une étude cinétique nous a permis de constater que l’adsorption suit le modèle cinétique du pseudo second ordre et l’étape limitante de l’adsorption est la diffusion intraparticulaire. La modélisation des isothermes d’adsorption a donné une information que l’adsorption du Cr (VI) sur les différents matériaux préparés suit le modèle de Freundlich. Les valeurs de l’énergie moyenne d’adsorption E, calculées dans le cas du modèle d’isotherme de D-R, pour tous les matériaux composites impliqués dans la récupération de Cr (VI) nous indiquent que l’adsorption est dominée par le phénomène de diffusion intra particulaire (158,11 KJ/mol pour 100% GON et 129,1 KJ/mol pour les autres adsorbants) ce qui confirme les résultats de l’étude cinétique. Finalement, dans une cellule électrochimique, on a réalisé des tests d’adsorption, et d’électrosorption dans des conditions expérimentales différentes. Ce qui nous a permis d’effectuer une comparaison entre les deux procédés par une étude cinétique à l’aide des modèles utilisés dans la première partie
Kinetics and thermodynamics of Cd(II) ions sorption on mixed sorbents prepared from olive stone and date pit from aqueous solution
(Science Publications, 2010) Babakhouya, Naouel; Boughrara, S.; Abad, F.
Problem statement: The aim of this study is to remove Cd(II) ions from aqueous solutions by adsorption. Mixed sorbent prepared from olive stone and date pit, an agricultural solid by-product was used as adsorbent. Approach: The adsorption experiments of Cd(II) onto the mixture of olive stone and date pit were conducted at different parameters such as, percent of olive stone and date pit in the mixture, temperature, initial solution pH and initial Cd(II) concentration. Adsorption isotherms were obtained at different percent of olive stone and date pit in the mixture. Results: This adsorption data was fitted with the Langmuir. Kinetic studies revealed that the initial uptake was rapid and equilibrium was established in 20 min for all the studied metals and that the data followed the pseudosecond order reaction. The thermodynamic of Cadmium sorption on the mixed sorbent follows the Langmuir model and the sorption capacity for cadmium increases when we add a small amount of olive stone at date pits (90% of date pits in mixture and 10% of olive stone) and a small amount of date pits at olive stone (90% of olive stone and 10% of date pits in mixture. In addition, the thermodynamic parameters, standard free energy (ΔG°), standard enthalpy (ΔH°) and standard entropy (ΔS°) of the adsorption process were calculated. The sorption of Cd(II) onto the mixture of olive stones and dates pit is spontaneous and presents an endothermic nature. The characteristics of the mixture were determined by the analysis of infra red spectral analysis. Conclusion: The results show that the mixture sorbent from olive stone and date pit is an alternative low-cost adsorbent for removing Cd(II)
Preparation and characterization study of an olive pomace - polyaniline composite conductor in the recovery of heavy metals by electrosorption and adsorption
(Aljest, 2018) Babakhouya, Naouel; Abdouni, M.; Louhab, K.
In this work, we have prepared a new composite material based on olive pomace (OP) and polyaniline (PANI) by the in situ-polymerization chemical method, demonstrated the ability of our material to conduct current through electrical conductivity tests.We used the spectral analysis techniques to characterize the material as well as Laser Particle Size and scanning electron microscopy to show that the PANI was successfully attached to OP.We have applied our new material in the recovery of Hexavalent Chromium by carrying out electrosorption tests at a positive potential imposed. We compared the recovery with chemical adsorption under the same conditions
Récupération des métaux lourds par l’utilisation des adsorbants naturels
(2010) Babakhouya, Naouel
La présente étude porte sur la valorisation d’un déchet agroalimentaire « le grignon d’olive et les noyaux de dattes » dans le domaine de traitement des effluents liquides industriels. Les deux matériaux ont été utilisés sous leurs formes natives ainsi qu’activées chimiquement par l’acide phosphorique tout en les mélangeant à différents pourcentages en vue d’obtenir une solution solide homogène et d’améliorer leur capacité adsorptive. Une caractérisation des adsorbants obtenus s’est avérée primordiale. Ainsi toute une gamme d’analyses physico-chimiques a été effectuée dont : la fluorescence X et la spectroscopie IRTF. En dernier des essais d’adsorption sur des substances en solution synthétique de dimensions différentes et nature chimique différente (phénol et Iode) ont été réalisés. En vue de tester les performances des différentes proportions d’adsorbants nous nous sommes intéressés au Cadmium (métal lourd) polluant dangereux. L’effet de plusieurs paramètres tel que le temps de contact, la concentration initiale en Cadmium, le pH de la solution, la température et la granulométrie ont été étudié en système en batch. Une modélisation des résultats expérimentaux a été effectuée à l’aide des models d’isothermes de Langmuir et Freundlich ainsi qu’une étude cinétique à l’aide de l’équation du pseudo-second ordre qui s’est avérée plus conforme aux résultats expérimentaux