Browsing by Author "Louhab, K."
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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 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)Item 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 ionsItem Adsorption of copper (ii) from aqueous solutions on antimony pillar/clay composite(Aljest, 2015) Cherifi, H .; Bougherara, S.; Louhab, K.The separation of copper from aqueous systems is studied for environmental protection. In this paper was studied the elimination of cooper from dilute aqueous solution by adsorption on a crude and chemical modified clays (pillared layers clays).The kinetics study of the adsorption of copper on the modified clay showed that equilibrium is reached after 60 mn. A high adsorption performance was recorded for the following optimum conditions at the temperature T = 25°C and the solid/liquid ratio = 2, Initial concentration of ion Cu2+ =40 mg /L, the amount of adsorbent clay = 800 mg, pH = 6Item Analyse de la consommation de l’énergie et des émissions de gaz à effet de serre associées à la production du fromage fondu par l’approche analyse de cycle de vie(2017) Younsi, Farroudja; Louhab, K.La fabrication du fromage est un processus complexe où une multitude d’opérations ont lieu et dont l’évaluation des impacts environnementaux s’avère nécessaire. Dans cette étude réalisée au niveau de la laiterie et fromagerie de Boudouaou (LFB), une analyse environnementale a été effectuée afin de déterminer les impacts liés au Procédé de fabrication du fromage fondu en termes de consommation de l’énergie non renouvelable (ENR) et des émissions de gaz à effet de serre (GES). L’approche utilisée est l’analyse de cycle de vie (ACV), qui est une méthode normalisée (normes ISO 14040 à 14044). Les résultats obtenus montrent que pour 1 kg de fromage fondu les émissions de GES sont de l’ordre de 4.25 kgCO eq et la consommation de l’ENR est de l’ordre de 38 MJ et que le cheddar est le contributeur principal aux deux catégories d’impact de l’ordre de 61% et 47% respectivementItem Analyse de la consommation de l’énergie et des émissions de gaz à effet de serre associées à la production du fromage fondu par l’approche analyse de cycle de vie(2017) Younsi, Farroudja; Louhab, K.La fabrication du fromage est un processus complexe où une multitude d’opérations ont lieu et dont l’évaluation des impacts environnementaux s’avère nécessaire. Dans cette étude réalisée au niveau de la laiterie et fromagerie de Boudouaou (LFB), une analyse environnementale a été effectuée afin de déterminer les impacts liés au Procédé de fabrication du fromage fondu en termes de consommation de l’énergie non renouvelable (ENR) et des émissions de gaz à effet de serre (GES). L’approche utilisée est l’analyse de cycle de vie (ACV), qui est une méthode normalisée (normes ISO 14040 à 14044). Les résultats obtenus montrent que pour 1 kg de fromage fondu les émissions de GES sont de l’ordre de 4.25 kgCO eq et la consommation de l’ENR est de l’ordre de 38 MJ et que le cheddar est le contributeur principal aux deux catégories d’impact de l’ordre de 61% et 47% respectivementItem 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 Biosorption of Cr (III) from aqueous solutions using bacterium biomass Streptomyces rimosus(2009) Sahmoune, Mohamed Nasser; Louhab, K.; Boukhiar, A.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 Comparative study of wet and dry process of cement manufacturing using Life Cycle Assessment approach(2014) Boughrara, S.; Aksas, Hammouche; Louhab, K.Item Effect of calcium competition on chromium adsorption by fungi biomass(2006) Louhab, K.; Sahmoune, Mohamed Nasser; Addad, J.; Bar, S.The kinetics and thermodynamic of adsorption of a mono-solute of chromium ions and of a bi-solute of chromium and calcium ions by fungi biomass (Streptomycine rimosus) was investigated in a batch system. The experimental data were analyzed based by Langmuir isotherm and a Pseudo second order mechanism, in the both the mono-and bi-solute adsorption systems, in order to predict the rate constant of adsorption, the equilibrium capacity. The results indicate that the adsorption mechanism is described by Langmuir isotherm and a Pseudo-second-order. The equilibrium adsorption capacity and the equilibrium rate constant increased with an increase in the initial chromium concentration in both mono-and bi-solute adsorption systems. The adsorption capacity of chromium decreased with an increase in calcium concentrationItem Effect of chemical treatment of the biomass fongic on the capacity of adsorption of the chromium(European Journal of Scientific Research, 2006) Sahmoune, Mohamed Nasser; Louhab, K.; Addad, J.; Goma, B.Heavy metals are present in different types of industrial effluent, being responsable for environmental pollution. Biosorption by the biomass fungic is a promising alternative method to treat industrial effluents, mainly because of its low cost and high metal binding capacity. In this paper we studied the effect of treatment at different concentration NaOH of the biomass fungic on the caracteristics of the biomass (morphology of the fungic biomass), and the capacity of adsorption of chromium. The analysis of the thermodynamic, the kinetics of adsorption, the spectra of infra-red spectra and the electron micrographs of the M.E.B. watch that these treatments, although resulting in apreciable weight reduction, also enhanced their capacity adsorption for chromium, while increasing the sorption kinetics. © EuroJournals Publishing, Inc. 2006Item 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 Efficacité des complexes organo/inorgano argileux pour l’élimination des métaux lourds à partir des solutions aqueuses(Aljest, 2019) Cherifi-Naci, Halima; Louhab, K.L’objectif de notre étude est la valorisation d’une argile de la région ouest d’Algérie dans le domaine de l’environnement. L’étude expérimentale consiste à déterminer les conditions optimales d’Activation (concentration : 3M à la température T=70°C, temps d’activation=4h, quantité d’H2SO4 adsorbée=1.45meq/g d’argile, CEC=52meq/100g d’argile) en vue d’obtenir une bentonite adéquate et prête à l’opération de pontage par des polycations d’Argent suivi d’une réaction de quaternation. Les argiles à piliers d’Argent et à fonction Ammonium quaternaire ainsi obtenues ont été caractérisées par des techniques : (XRF, DRX et le MEB) et par des analyses physico-chimiques (CEC, surface spécifique, et l’indice d’acidité).Les distances basales des bentonites à pilier d’argent et celle fonctionnalisée sont de l’ordre de 25.01A°et 37.01A°, respectivement. Les surfaces spécifiques de l’argile à pilier d’argent et celui fonctionnalisé sont de l’ordre de 840 m2/g et 858.22m2/g, respectivement. Nous avons réalisé des essais d’élimination des métaux lourds sur les complexes organo/inorgano argileuxItem Elimination of copper (II) in aqueous solution by adsorption on a pillared clay with polycations of aluminum and iron(International Congress of Chemistry and Environment, 2015) Cherifi-Naci, Halima; Louhab, K.; Aksas, HammoucheItem 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 determinedItem 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 endothermiqueItem 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 Kinetic analysis of trivalent chromium biosorption by dead streptomyces rimosus biomass(2010) Sahmoune, Mohamed Nasser; Louhab, K.