Publications Scientifiques
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Item Preparation and Characterisation of adsorbent prepared from sewage sludge for removal of methylene blue(ALJEST, 2020) Djoumad, Sonia; Benrachedi, K.; Ladji, H.The objective of this study is to valorize an urban waste, the sludges from the wastewater treatment plant of Boumerdes/Algeria for the removal of methylene blue dye in aqueous solution by adsorption. The material made from this sludge has been characterized by various techniques: X-ray fluorescence microscopy (XRF), X- ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM) to obtain information concerning their structures and their compositions.A systematic study of various parameters such as: effect of adsorbent dosage, contact time and initial dye concentration was carried out in order to optimize the ideal conditions for a good adsorption of the studied pollutant; especially the kinetics of adsorption.The exploitation of experimental results using different kinetic models and adsorption isotherms showed that the sludge has similar adsorption characteristics to those of activated carbon, which perfectly confirms the applicability of the activated sludge in the wastewater treatment.Item Simultaneously efficient adsorption and photocatalytic degradation of sodium dodecyl sulfate surfactant by one-pot synthesized TiO2/ layered double hydroxide materials(Taylor and Francis Online, 2019) Aoudjit, Farid; Cherifi, Ouiza; Halliche, DjamillaThe large amount of surfactants discharge into wastewater are harmful for both terrestrial and aquatic life; in fact the removal of surfactants from wastewater becomes necessary. The present study is focused on to the removal of sodium dodecyl sulphate surfactant (SDS) by adsorption and photocatalytic degradation using Zn(2)Al-LDH and TiO2/Zn(2)Al-LDH materials synthesized by coprecipitation. The experimental adsorption data obtained were evaluated using Langmuir Freundlich and Temkin isotherms models. The photocatalytic degradation activities of SDS at different concentration in the range of (10−100 mg/L) over Zn(2)Al-LDH and TiO2/Zn(2)Al-LDH follows the pseudo first-order kinetics in accordance with the Langmuir Hinshelwood model. The results indicated that TiO2(3.6)/Zn(2)Al-LDH show the highest photocatalytic activity compared to Zn(2)Al-LDH sampleItem Biosorption of hexavalent chromium and Congo red dye onto Pleurotus mutilus biomass in aqueous solutions(Springer Science and Business Media Deutschland GmbH, 2021) Alouache, A.; Selatnia, A.; Sayah, Houssem Eddine; Khodja, M.; Moussous, S.; Daoud, N.With the significantly increasing pharmaceutical and antibiotics industry in Algeria, the elimination of biomass is of utmost importance since the latter represents a large part of waste from the manufacturing process. In this work, the elimination of hexavalent chromium Cr (VI) and Congo red dye is part of the Pleurotus mutilus biomass recovery process. Thus, biosorption has been studied in a discontinuous system. Optimal conditions were estimated by variations in contact time, temperature, initial pollutant concentrations, and simultaneous removal of both pollutants. The greatest uptake capacities achieved were 36.68 mg/g of and 15.08 mg/g of Cr(VI). The initial concentrations of both pollutants being equal to 50 mg/l, for a duration time of 180 min and a temperature of 300 K. Based on the values of the coefficient of determination R2, χ2, and ARE, the isothermal equilibrium data were better represented by Freundlich, Temkin, and Dubinin-Radushkevich models. The kinetic biosorption of the two pollutants was well described using the pseudo-first-order model. The biosorption process is controlled by external mass transfer. The physical process in nature of Cr(VI) and (CR) biosorption has been justified based on the values obtained of ΔG° and ΔH°. Globally, this work demonstrates the considerable potential of Pleurotus mutilus for the elimination of anionic pollutants. Research results indicate that this biomass, a waste material, first destined for incineration, was recovered without any treatment. Due to its low cost, it could serve as an inexpensive source for recovering heavy metals and dyes from dilute contaminated water. © 2021, Islamic Azad University (IAU)Item Effect of the olive mill wastewater on corrosion behaviour of carbon steel(2019) Yahia, Zineb; Ziati, Mounir; Aissiou, Nabila; Bounoughaz, MoussaItem Kinetic and thermodynamic studies of the ammonium ions adsorption onto natural Algerian bentonite(Taylor & Francis, 2016) Angar, Yassmina; Djelali, Nacer-Eddine; Kebbouche-Gana, SalimaAdsorption processes are the most recommended complementary techniques applied in the wastewater treatment owing to their low economic cost, recyclability, efficiency and low power consumption. Clays known for this treatment are aluminosilicate minerals which contain different exchangeable ions on their surfaces. In the structure of bentonite surface, several cations have the exchange ability such as calcium, sodium, magnesium and potassium. This propriety is responsible for the adsorption of several cationic water pollutants. In this study, natural bentonite particles of 80 μm in diameter were considered and kept stirring at 200 RPM in a contaminated solution with ammonium ions. The effect of contact time and temperature showed that at an optimal temperature of 30°C and during a short stirring time of 50 min, the removal efficiency could reach its maximum of 53.36%. The kinetic study of the ammonium adsorption reaction on natural bentonite allowed concluding that the reaction is obeyed to the first-order model. Determination of various thermodynamic parameters suggests that the reaction is spontaneous and exothermicItem Investigation of ammonium adsorption on Algerian natural bentonite(Springer, 2016) Angar, Yassmina; Djelali, Nacer-Eddine; Kebbouche-Gana, SalimaItem Valorization of fibrous waste for the wastewater discoloration(2013) Ouslimani, Nassira; Zrari, F.; Abadlia, Mohamed Tahar; Benabed, H.Item Contribution to the elimination of nitrate in wastewater(2012) Angar, Yassmina; Kebbouche-Gana, Salima; Djelali, Nacer-EddineItem Study of the environmental impacts of urban wastewater recycling (case of boumerdes-Algeria) by the life cycle assessment method(2012) Messaoud-Boureghda, M.Z.; Fegas, R.; Louhab, K.