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 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 = 6Item State and evolution of the microbiological pollution of the lake of reghaïa(Université M'Hamed Bougara Boumerdes, 2018) Delleci, K.; Sayoud, S.; Louhab, K.The lake of reghaïa is a fresh water tank, which represents a very vulnerable link for maintenance of the balance in the ecosystem, but currently it receives a very important volume of liquid-effluents generated by the industrial activities which disturbs the balance of the aquatic life opposite fauna and the flora, the micro-organisms represent a biological form of pollution conveyed by the industrial effluents ( sewage), the objective of our study is the identification, the quantitative estimate and the follow-up of the seasonal dynamics of the various communities of the micro-organisms which develop in this tank, for this purpose 3 series of taking away were carried out between the month of December 2015 and July 2016, in order to follow the development and the proliferation of certain micro-organisms of the coliforms type fecal and streptococcus fecal which are, Escherichia coli (colon bacillus) (enterobactery) and the streptococcus ones of group D (enterococcus), where the enumeration was carried out by the method NP and the presence of the salmonella and vibrio-choleric. The results gave very high concentrations which exceeds 15*104 for the coli bacilli and between 0-6 for the enterococcus ones, with absence of salmonella and choleric vibrio, which allows us to classify our water category 4 (water of bad quality), and the dynamics of the bacteria follows a seasonal cycle which varies according to the flow and the nature of the effluents rejected towards the lake (physico-chemical characteristics) of waterItem 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 Surfactants Elimination by biological pathway(ALJEST, 2018) Belkhir, Meriem; Louhab, K.; Boughera, S.; Remmi, H.Surfactants are major components of detergents and cosmetics; they are among the most undesirable pollutants in the environment because of their toxic effects on aquatic organisms. The main objective of this work is to define the elimination limits of the three different types of surfactants (anionic, cationic and amphoteric) by activated sludge. The results obtained were modeled by the model ASM1 (Activated Sludge Model N°1) in order to establish a better representation of the kinetic parameters such as the rate of disappearance of surfactant rs and the growth rate of the biomass rc. According to the classification based on biodegradation surfactants, the results obtained suggest that the AES is more degraded than the other surfactants with rs AES = 17.01 mg / lh at (cAES = 40 mg / l, T = 35 ° C) and rc AES = 1.42. mg / lh under the same conditions.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 Etude potentielle de mélange des adsorbants naturels (grignons d’olive et noyaux de dattes) pour l’adsorption du chrome(Aljest, 2016) Aksas, Hammouche; Cherifi-Nacy, H.; Babaci, N.; Louhab, K.Cette étude a pour objectif d’étudier le potentiel d’utilisation de matériaux naturels (mélange homogène de noyaux de dattes et de grignons d’olives) issus de l’activité d’agriculture pour le traitement des eaux usées, chargées en polluant métallique: le chrome. Ces deux matériaux ont été activés chimiquement par l’acide phosphorique, en les mélangeant à différents pourcentages, afin d’obtenir une solution solide homogène et d’améliorer leur capacité adsorptive. L’adsorption des ions du chrome est étudiée en milieu dispersé (batch) à la fois sur les matériaux pur et à l’état du mélange à différentes proportions, composées d’une quantité fixe en noyaux de dattes (ND), et des quantités du grignon d’olive (GO) variées. Les résultats d’adsorption du chrome montrent : qu’elle est maximale à un pH =5.6, croit avec la température et avec la concentration initiale du chrome dans la solution. Le modèle de Langmuir stimule mieux les isothermes d’adsorption du chrome que d’autres modèles étudiés (avec un coefficient de corrélation de 0.9988 pour (88% NDI, 12% GOI). L’adsorption du chrome augmente avec l’augmentation du taux du grignon d’olive dans le mélange d’adsorbant (grignon d’olive et noyau de date).Item Evaluation of the quality of the ground of the lake of Reghaïa in heavy metals and study of their distribution on the surface(Aljest, 2018) Delleci, K.; Mohamed, N.; Madjdoub, F.; Sayoud, S.; Louhab, K.The Lake of Reghaïa is an exceptional natural heritage in the Algiers area, it underwent a dramatic pollution by its rejection supply due to the close industrial activities. Since the year 1999. That, encouraged us to accordingly take part in order to present an evaluation of the quality of the grounds of the site as regards pollution in MTE (metallic trac elements) heavy metals. We have selected a ground located on western bank of the lake, of a square surface, limited to 2,500 m2 of a slope of 25%, it is agricultural but not exploited for more than 20 years according to the owner of the ground. That has an advantage of excluding the irrigation by water from the lake. A systematic sampling of triangular grid of thirteen (13) samples with positions GSP (geographical system of positioning) of each point. Quantities of approximately 100g more 1 kg of ground were taken. Analysis by AAS (atomic absorption spectrometry) has shown presence of heavy metals (Ni, Zn, Pb, Cd, Cr, Cu and Hg), which does not exceed the values of reference on selected surface, of the contents of (Ni and Zn and Hg) exceed slightly the values reference in the superior part of surface located at 64 m of bank of lake, and approximately 20 m in height compared to the surface of the lake, the pollution of the surface of ground were not noted, however, from the contents of (Cr) go beyond the values of reference in all surface marking higher spades in the medium of surface, On the other hand, accumulation Cu is on the level nearest to the lake. Strong Mn concentrations on all the surface particularly they are high on first line close to lake and the limit superior of analyzed surface.Item Study of the adsorption of methylene blue by natural materials (olive stone, date pit and their mixture) in fixed bed column(Aljest, 2019) Abed, F.; Louhab, K.; Abai, Nadjet; Babakhouya, N.The present study focuses on the recovery of two agro-food waste available in our country with significant quantities olive pomace and date pits for the removal of a synthetic dye which is methylene blue. Both materials were used in their native forms separated and mixed to improve their adsorptive capacity. A range of physico-chemical analysis was performed to characterize adsorbents used, among them: the FTIR spectroscopy and the scanning electron microscopy. The ability of adsorbents prepared to adsorbe methylene blue (MB) from the aqueous solution was investigated in a fixed bed column. The effects of several important parameters were studied, such as initial concentration of MB, flow rate and bed height. The corresponding breakthrough curves were calculated