Browsing by Author "Akssas, H."

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    An Agrofood waste physicochemical characterization for its valorization
    (YYYY) Didouche, Yasmina-Fadila; Akssas, H.
    This study was focused on biorefinery byproducts mainly, based on distilled fatty acids from sunflower oil and coconut oil; for their valorization. They were characterized oleochemically, for sunflower oil, the Iodine Index: 120 g I2 / 100g fat noted the unsaturation of its fatty acids and the Refractive Index (RI) n 20: 1417 revealed its siccativity. As for the coconut oil, the saponification index: 250 mg KOH / g fat was on the rise, insured its ability to promote saponification and the IR n20: 1. 448 attested its un-siccativity; polyunsaturated fatty acids of these both oils were revealed via gas chromatography. These tests results were promoted for the development of a liquid soap, that was characterized physicochemically via the residual base: 0.02%, total fat content: 25.52%, residual glycerol content: 14.68%, pH: 07.90, lyophilic hydrophilic balance: 20. 02, surface tension: 34.10 dynes / cm, concentration micelle critic: 05. 103 mol /l and spectral methods such FTIR, XRD and SEM corroborated these analyses; which were confirmed the presence of carboxylic fatty acid salts. This work was conclusive, resulted in a liquid soap loaded with 14.68% of vegetable glycerin with moisturizing, emollient and softening properties, in conformity with hygiene standards
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    Speciation of chromium in bottom ash obtained by the incineration of the leather waste shavings
    (2006) Louhab, K.; Akssas, H.
    The evolution of bottom ash morphology and chromium metals behavior during incineration of a leather waste shavings at different incineration temperature have been studied. The Cr, Ca, Mg, Cl rates in bottom ashes, flay ashes and emitted gases in different incineration temperature of the tannery wastes are also determined. The morphology of the bottom ashes obtained by incineration at different temperature from the leather waste shavings was examined by MEB. The result show that the temperature and the length of incineration influence on the structure of the bottom ash and on the chromium in the bottom ash