Browsing by Author "Boughrara, S."

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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)
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    Comparative LCA between conventional luminaires and a LED luminaire with a prediction on optimisation of environmental impacts
    (ALJEST, 2022) Benali, Ali; Louhab, K.; Aksas, H.; Boughrara, S.
    Excessive usage of public lighting systems creates considerable environmental impacts. Impacts before using public lighting, such as carbon dioxide emissions and the depletion of resources, are essentially due to the production of electric energy that is necessary for power supply, as well as transportation and distribution. The manufacture of the components of a public lighting system also constitutes a life cycle, which creates emissions that have significant impacts on the environment. After the use of a public lighting system, the strain regarding the management of end-of-life waste of light fixtures arises. Waste such as glass, plastics, metallic waste, as well as lamps of which certain types contain mercury, sodium, and other substances that are more or less harmful. In addition to the impacts mentioned above, the direct fallouts of exploiting lighting fixtures impact fauna and flora species as well as human health under the effect of artificial light emitted throughout the night. The present articles aims, according to the approach during the life cycle assessment (LCA), to identify which of the existing technologies can make public lighting a factor of comfort, security, wellbeing on one hand, and offer optimal performances on the environmental, energetic, and economic aspects, thus reducing the risks threatening biodiversity and the equilibrium of ecosystems. The retained solution must converge towards an “echo-lighting” as well as towards a “smart lighting” which would answer major worries linked to the deployment and irrational use of conventional public lighting, which is energy-intensive and a generator of potential environmental damages. Smart Lighting consists of guaranteeing a dynamic operation of lights through emerging technologies, which would ensure a supply of artificial light based on the existing natural light, with the possibility of taking into account the presence of users (vehicle, pedestrian, etc) or the lack thereof, as well as the automatic adaptation of light intensity to normative demand and needs.
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    Efficacité des Argiles à Piliers d’oxydes d’Aluminium et de Fer pour l’élimination du Cu (II) à partir des Solutions Aqueuses
    (University of M’HAMED Bougara Boumerdes, 2015) Cherifi-Naci, H.; Boughrara, S.; Louhab, K.
    Pillared Clays with polycations of Aluminum and Iron have been ‎synthesized from natural bentonite using the solutions of Al ‎‎(NO3)3.9H2O and Fe (NO3) 3.9H2O as pillaring agents. The ‎resulting pillared clays have been characterized by X-ray ‎diffraction (XRD), X-ray fluorescence (XRF) and by infrared ‎spectroscopy (FTIR) .The d-spacing of pillared clays of ‎Aluminum and Iron is 20.25 A° and 30.23 A°, respectively. The ‎specific surface area of the clay pillars of aluminum and iron is ‎‎290 and 360 m2 /g, respectively. The kinetic study of the ‎adsorption of copper on the modified clays showed that ‎equilibrium is reached after 60 min. A high adsorption ‎performance was recorded for the following optimal conditions: ‎at the temperature T = 25 ° C, the solid / liquid ratio = 2, the ‎initial concentration of the ion Cu 2+ = 40 mg/l, the amount of ‎adsorbent clay = 800 mg and pH = 6
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    Enviornmentalimpact of Algerian cement factories on fauna and flora
    (Asian Publication Corporation, 2017) Aksas, Hammouche; Boughrara, S.; Louhab, K.
    The aim of this study is to evaluate the environmental impact of atmospheric emission of two kinds of cement portland processes in the Algerian factories on fauna and flora. The first uses the dry process and is located in a rural area (Sour El Ghozlane) and sec ond is in an urban area (Rais Hamidou) and uses the wet process. To evaluate the atmospheric impacts generated by the cement factories, life cycle assessment approach is applied using Simparo 7.1 software and EDIP method. A comparative study of the impacts evaluated for the se processes and the contribution of the compound for all impact categories were determined
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    Etude du potentiel d’utilisation des déchets agroalimentaires, les grignons d’olives et les noyaux de date pour récupération et adsorption des métaux lourds
    (Université M'Hamed Bougara Boumerdes, 2015) Babakhouya, N.; Boughrara, S.; Abed, F.; Abai, N.; Midoune, S.
    La présente étude porte sur l’application d’un adsorbant naturel ‎préparé à base de grignon d’olives et de noyaux de dattes à ‎différents pourcentages dans le domaine de traitement des ‎effluents liquides industriels. Dans notre travail nous nous ‎sommes intéressés à son application pour le cadmium (métal ‎lourd). L’effet de plusieurs paramètres tel que le temps de contact, ‎la concentration initiale en ions de cadmium, et le pH de la ‎solution a été étudié en système en batch. Une modélisation des ‎isothermes d’adsorption a été effectuée à l’aide des models ‎d’isothermes de Langmuir, Freundlich et Temkin et leur ‎coefficient de corrélation obtenus, indiquent que le model de ‎Langmuir est favorable pour la plupart des proportions ‎d’adsorbants
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    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)
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    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 coefficients
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    Toxic Effect Of Surfactants On Marine Species ‎mediterranean Mussel: Mytilus Gallprovinciallis And ‎evaluation Of Their Aquatic Toxicology Impact By Lca ‎methodology
    (Aljest, 2015) Belkhir, Meriem; Boughrara, S.; Boutiche , H.
    The increase of over 500% in ten years, the use of synthetic detergents explains the high concentrations explain the high concentrations in liquid effluents. Part of these discharges flow without purification in rivers. Which it is interesting to assess the impacts thus generated by such a detergent manufacturing process. In our study we used the tool life cycle assessment (LCA) methodology to assess the aquatic toxicology impact of liquid detergent intended multi user. This study needs the use of SimaPro7.1 software and EDIP 2003method.In order to explain aquatic toxicology impact was chosen by selecting a type of marine species Mediterranean mussel Mytilus gallprovinciallis.In our study we determined the toxic effect of anionic surfactants (LAS, AES) characterization of liquid effluents generated by one of the leading Algerian companies in detergents. Comparing the toxicology of two anionic surfactants is obtained after determining the lethal concentrations of fifty percent (LC50) of the individuated simmering with forty-eight hours (48h), Ensuring living conditions (temperature, O2, pH, TH, TA, TAC). In an aquarium. Any and controlling various pollution parameters (BOD5, COD, Nitrate, Nitrite, Phosphate, Sulfate, Dissolved Oxygen