Browsing by Author "Bougherara, S."

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    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 = 6
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    Characterization and valorisation of olive by-products from a traditional oil mill in Béjaia
    (2021) Bougherara, S.; Boucetta, N.; Lecheb, F.; Medjdoub, F.; Delleci, K.; Belkhir, Meriem
    In Algeria, the olive oil extraction generates enormous quantities of olive-growing by-products: the olive residue and margines. So, the characterization and the valorization of these by-products seem of great importance. The first shutter consists in characterizing the whole of fractions resulting from the centrifugation of the margines (liquid rejection) to knowing the liquid phase, the oily phase and the solid phase as well as the olive residue, with various physicochemical techniques of analysis available on the scale laboratory. The liquid fraction which was characterized shows a very strong organic and mineral matter concentration being able to be used in irrigation either directly, or diluted with water after having undergone physicochemical and biological treatments, enriching the composition and texture by the arable lands (fertilizingcontribution).As for the oily fraction the results show a very goodnutritional quality from the point of view analyzes physico chemical, dedicated to being used like salad oil or in our work, it was used for obtaining a dry soap
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    Evaluation of contaminant kinetics in tetra-pack conditioned juice: evolution of the physico-chemical and microbiological parameters during the storage period
    (Université M'hamed Bougara de Boumerdès, 2020) Lecheb, F.; Bougherara, S.; Delleci, K.; Djoubani, L.; Lazazi, M.; Rahal, B.
    Packing is the new operations in the manufacture of food products, they will help maintain thehygiene, tactile and nutritional quality of the food and meet thelogisticalconstraints.A study was conducted to determine the effects of packaging materials, storage temperature, and time on physiochemical and bacteriological properties of conditioned juice.pH, acidity, Brix, mineral content (heavy metals before and after contact, in packaging and in juice), migration test, microbiological analysis, and antioxidant activity (FRAP) were evaluated in freshly prepared juice, and after 15, 30, 45, 60, 75, and 90 days of storage at room temperature. A migration test was conducted using three percent acetic acid as a simulator followed by an Atomic Flamming Adsorption Spectroscopy analysis of the tested packaging and analysis by TF-IR of the product. Theresults showed that pH, acidity, Brix, decreased with storage times. According to the results obtained no variability was observed for the microbiological parameters during the storage period.As for the physicochemical parameters, minor variations have been observed. The loss of total phenols and vitamin C content was higher in juice stored at 90 days than 15 days. The results of mineral analyzes show a slight variation of 1 to 2 mg / l compared to the reference sample (0-day storage sample), for K +, Na+, Cl-and PO4-3, with the exception of calcium ion, for which there was a sharp increase after 45 days of storage, which then declined. The findings showed the lack of migration of the packaging to thefood, thusmaintaining the initial composition.