Publications Nationales
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Item 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.Item Assessment Of The Environmental Impacts Resulting From The Presence Of Surface Agents In The Discharge From An Urban Water Cleaning Station In Algeria By The Life Cycle Assessment Method(ALJEST, 2020) Belkhir, Meriem; Louhab, K.; Bougherar, S.The poor assessment of the environmental performance of water treatment systems led us to apply the life cycle assessment approach to a wastewater treatment plant. The purpose of our work is to evaluate the environmental impacts of the surfactants release from an existing urban wastewater treatment plant with a capacity of 35000 m3/inhabitant located in the city center of Boumerdés 45 km from the capital Algiers The article presents an evaluation of the environmental impacts of the surfactants release .This evaluation was established using Simapro8.1 software and the Midpoint ILCD version 1.03 methods. The results of evaluation show four impact categories are evaluated; - Human toxicity, Fresh water eutrophication, Marine eutrophication and Fresh water ecotoxicity. All the impact categories evaluated contribute to the surfactants fixed in the functional unit alcohol ether sulfate (AES), hexadecyl trimethyl bromide ammonium (CTAB) and Betaine of lauramidopropyl (BLP) of three different anionic, cationic and amphoteric types, respectively. Finally, we conclude from the results obtained that the value of the impact of ecotoxicity is the highest (3, 24E-4 CTUe) compared to the other impact categories whose impact category represents the impact significant.Item Organic-inorganic hybrid zeolite silica materials by grafting of trimethylchlorosilane TMCS: part I: preparation and characterization(ALJEST, 2021) Bouchher, Omar; Benrachedi, K.; Makhlouf, M.; Messabih, S. M.; Louhab, K.The functionalization of our 13X zeolite was carried out by the post-synthesis method using an organosilane of the Trimethylchlorosilane type (TMCS) to obtain a more hydrophobic organic-inorganic hybrid zeolite. Our zeolite before and after grafting was characterized by different analysis techniques (XRD, FTIR, BET, and SEM). The XRD results of the grafted 13X zeolite, show that the functionalization does not destroy the crystal structure of the material. FT-IR analysis of the 13X zeolite before and after grafting confirms the grafting of our organosilane on the surface by the disappearance of the absorption band of the silanol groups at 980 cm-1 and the appearance of a band of absorption attributed to the vibrations of the trimethylsilyl Si (CH3) group at 2970 cm-1. The specific surface area of our grafted 13X has been reduced by 63.22 m2 / g thanks to the organic group which has been grafted on the external surface. According to SEM results, the morphology of the surface of our material was slightly modified after grafting. The results of various analyses demonstrated that the grafted 13X zeolite is successfully obtained using the post-synthesis method.Item Adsorption kinetics modelling of methylene blue solution by activated carbon using Peleg’s equation(Université M'hamed Bougara de Boumerdès, 2020) Bourfis, Nassima; Benaissa, F.; Benamara, S.; Gougam, H.; Louhab, K.The aim of this study is to envisage the possibility of modelling the adsorption kinetics of methylene blue (MB) by activated carbon using the Peleg’s model. Equation often used to describe the sorption and absorption kinetics of water by the material. The study of equilibrium adsorption was also envisaged in this study and the isotherms of Langmuir and Freundlich were tested. The activated carbon was prepared from almond shells bitter, fruit of plants growing in parts of Algeria, especially in the Setif region. Statistical analyses, have proved that the adsorption kinetics of MB by activated carbon is perfectly (R² = 0.9999) described by the Peleg model. On another hand, the study showed that, compared to the Langmuir model, Freundlich model is most appropriate to describe the equilibrium adsorptionItem Valorization of olive tree leaves : phytochemical and pharmacological characterizations, selection of extracts and formulation of herbal cream(2021) Bakdi, Hadjer; Kebbouche-Gana, Salima; Djelali, N.; Louhab, K.; Yahiaoui, K.Olive tree (Olea EuropeaL.) is one of the most important crops in the Mediterranean countries. The global olive oil industry annually generates many tons of olive leaves as waste.The present study aims at a valorisation of Algerian olive leaves harvested from the region of Bouirafor therapeutic use. In order to evaluate the biological effects of the wild olive tree, chemical characterization tests of the leaves were carried out in the Natural Substances Laboratory of Saidal group according to their validated protocols drawn from the French pharmacopoeia. A phytochemical screening has been realized and whose purpose is to refer to the extraction, screening and identification of the medicinally active substances in the plant. Different extractions have been carried out in several solvents in order to extract bioactive molecules from the leaves using several solvents. Subsequently, a pharmacological characterization has been completed by determining the following: antioxidant activity of the extracts was evaluated in vitro by the DPPH method, anti-inflammatory activity was studied in vivo by induction of carrageenan oedema; the antibacterial activity was achieved by the agar medium diffusion method. Finally, we formulated an anti-inflammatory and antibacterial ointments based on the results obtainedItem Étude de l’adsorption d’un colorant cationique en milieu aqueux sur le charbon actif Issu de la ferula communis(2020) Messabih, S.M.; Benrachedi, K.; Makhlouf, M.; Belaid, K.D.; Bouchher, Omar; Louhab, K.La présente étude est consacrée à la préparation d’un charbon actif en poudre à partir des tiges broyées de la Ferula communis récoltées dans les coteaux de la wilaya de Tipaza au nord de l’Algérie. La matière végétale a été imprégnée à l’acide phosphorique (H 3 PO 4 ), puis carbonisée à 550°C dans un four à moufle. Les résultats obtenus par caractérisation du matériau adsorbant ont montré une importante porosité et une surface spécifique de 1377 m 2 /g. Les applications de l’adsorption du colorant rouge neutre sur le charbon actif, dans un milieu aqueux, ont révélé une capacité d’élimination de l’adsorbat allant jusqu’à 666 mg/g. L’étude thermodynamique a montré que le processus de l’adsorption est spontané et endothermique