M. HAMAOUI Yasmina

MCB

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Department

Departement of Microbiology and biochemistry

Research Interests

Bio-based Material Characterization

Contact Info

University of M'Sila, Algeria

Email : yasmina.hamaoui@univ-msila.dz

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Recent Publications

2018

Effect of Opuntia ficus indica mucilage on copper removal from water by electrocoagulation-electroflotation technique

Electrocoagulation-electroflotation (EC-EF) process assisted with the mucilage of Opuntia ficus indica (OFI) plant was investigated in order to enhance copper removal efficiency. EC-EF tests with aluminum electrodes were conducted for the treatment of a synthetic copper solution of 100 mg/L, to estimate the influence of the mucilage on removal of copper metal ions, aluminum and hydrogen Faradaic yields, settling process and specific electrical energy consumption. It was mainly found that: (i) copper removal efficiency reached 100% in < 5 min with 30 mg/L OFI mucilage at pH 7.8; (ii) OFI mucilage affected aluminum and hydrogen Faradaic yields at high removal efficiencies; (iii) copper sludge settling rate rises with increasing mucilage concentrations, and was enhanced by 15%; (iv) OFI mucilage reduced specific energy consumption at a fixed current density along with removal efficiency increase. Furthermore, the formed flocs, in the presence or not of mucilage, were identified by scanning electron microscope analysis (SEM). This work promotes the use of OFI mucilage as an active natural coagulant aid for the removal of copper species from water, by suggesting the substitution of chemical coagulants that are often added to the EC-EF technique.
Citation

M. HAMAOUI Yasmina, Nawel Adjeroud, Saliha Elabbas, Belkacem Merzouk, Lamia Felkai-Haddache, Hocine Remini, Jean-Pierre Leclerc, Khodir Madani, , (2018), "Effect of Opuntia ficus indica mucilage on copper removal from water by electrocoagulation-electroflotation technique", [national] Journal of Electroanalytical Chemistry , Elsevier B.V.

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Effect of filler load and high-energy ball milling process on properties of plasticized wheat gluten/olive pomace biocomposite

The increase of particles surface area can optimize the dispersion state of biocomposite components and enhance their properties. First in this paper, we aimed to elaborate a novel biocomposite without any treatments. Plasticized wheat gluten (WG), was filled with 0–20% of olive pomace (OP) powder. The second objective was the improvement of biocomposite properties using physical treatment. High-energy ball milling process was applied on the blend of wheat gluten and olive pomace powders (MPs). The grinding effect of particle shape, size and distribution in biocomposite was characterised by particle size distribution using a laser-light diffraction and by SEM analysis. The cryo-fractured surface of selected films, mechanical properties, moisture absorption and thermal properties of both biocomposites were described in details. It was found that the sensitivity of biocomposites to moisture absorption was reduced with the increase of filler content after the applying of high-energy ball milling process. The thermal stability of OP biocomposite decreased with the increase of loading, while that of MPs was unaffected by high-energy ball milling process. This process affects the physical and morphological characteristics of the powders. The mechanical properties were improved by grinding process at filler content lower than15%.
Citation

M. HAMAOUI Yasmina, Asma Boudria, Nawel Adjeroud, Nabila Djerrada, Khodir Madani, , (2018), "Effect of filler load and high-energy ball milling process on properties of plasticized wheat gluten/olive pomace biocomposite", [national] Advanced Powder Technology , Elsevier B.V. and The Society of Powder Technology Japan

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2017

Enhanced electrocoagulation–electroflotation for turbidity removal by Opuntia ficus indica cladode mucilage

The optimisation of the electrocoagulation‐electroflotation (EC‐EF) process assisted by the mucilage of the Opuntia ficus indica (OFI), on the turbidity removal was performed through the response surface methodology (RSM). For a solution of 300 mg/L of silica gel, high turbidity removal (93.14% ± 1.31) was obtained under the optimal conditions of 2.5 mg/L, 21.2 V, 9.65 and 2.61 mS/cm for the mucilage concentration, voltage, pH and conductivity, respectively, this experimental value was close to the predicted value of 92.96% ± 0.3. OFI mucilage increases turbidity removal efficiency and reduces specific energy consumption at a fixed current density. The turbidity removal of the EC‐EF process was improved by 30.94% compared with the conventional EC–EF (EC–EF without OFI mucilage) which shows 62.02% ± 1.45 of turbidity removal.
Citation

M. HAMAOUI Yasmina, Naima Djerroud, Nawel Adjeroud, Lamia Felkai‐Haddache, Hocine Remini, Farid Dahmoune, Belkacem Merzouk, Khodir Madani, , (2017), "Enhanced electrocoagulation–electroflotation for turbidity removal by Opuntia ficus indica cladode mucilage", [national] Water and Environment Journal , John Wiley & Sons, Inc.

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2016

Étude des relations structure/propriétés des matériaux composites à base d’agro-polymères et de grignons d’olive.

Des biocomposites ont été développés à partir de gluten de blé plastifiées avec 35% de glycérol, contenant 0-20% des poudres de grignons d'olive (OP) ; Poudres broyées (MPS), grignons d'olive nettoyé (COP) ; nettoyé Mercerisé (MCOP); nettoyé Estérifié (ECOP); nettoyé mercerisé traité au Silane (SmCOP); nettoyé mercerisé traitée au Permanganate (PmCOP); qui ont été préparés avec succès par mélange classique. Le broyage mécanique appliqué affecte les caractéristiques physiques et morphologiques des particules de grignons d'olive. En outre, la taille des particules, l'humidité, l'absorption d'eau et les propriétés thermiques ne sont pas affectés. Spectroscopie FTIR confirme les modifications chimiques des poudres, tandis que le MEB a montré une surface lisse pour la poudre estérifié, et une surface rugueuse pour les poudresmercerisé, traitées au Silane, ou au permanganate.

Les modifications chimiques appliquées améliorent la stabilité thermique des poudres après mercerisage, tandis que la poudre estérifiée n'a pas été affectée. Néanmoins, la stabilité thermique de l'ensemble des biocomposites n’est pas affectée par le renforcement. Les propriétés mécaniques des biocomposites de MCOP, ECOP, Sm COP ont été améliorées avec un taux de charge moins de 15%. La présence des micropores dans les biocomposites influence la résistance mécanique, l'humidité et l'absorption d'eau.
Citation

M. HAMAOUI Yasmina, (2016), "Étude des relations structure/propriétés des matériaux composites à base d’agro-polymères et de grignons d’olive.", [national] Université de Bejaia

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2015

Preparation of plasticized wheat gluten/olive pomace powder biocomposite: Effect of powder content and chemical modifications

During the last decades, a lot of interest was given to the biocomposites development, due to the low cost and degradability of waste food industries. In this study, biocomposites were developed from Wheat Gluten plasticized by 35% of glycerol, containing 0–20% of Clean Olive Pomace (COP), Esterified Clean Olive Pomace (ECOP), or Mercerized Clean Olive Pomace (MCOP) powders, which were prepared by conventional blending. Chemical modifications of the powders were characterized by Fourier Transform Infrared (FTIR) spectroscopy, Scanning Electron Microscopy (SEM), and thermogravimetric analysis (TGA). Mechanical properties, water absorption, mass loss and thermal properties of biocomposites were detailed. It was found that thermal stability of powder was improved after mercerization. Incorporation of COP powder (20%) in plasticized wheat gluten (WG) improved significantly Young's modulus compared to that of WG films. Water absorption was decreased significantly at 20% of reinforcement and was 29% less than that of WG films. Young's modulus and tensile strength decreased at 5% of ECOP powder, contrary to MCOP biocomposite Elongation at break of biocomposites was decreased with increasing powder content. Incorporation of COP powder (20%) decreased thermal stability of the biocomposite, nevertheless chemical changes did not affect the thermal stability of the ECOP and MCOP biocomposites.
Citation

M. HAMAOUI Yasmina, Sonia Molina-Boisseau, Antoine Duval, Nabila Djerrada, Nawel Adjeroud, Hocine Remini, Farid Dahmoune, Khodir Madani, , (2015), "Preparation of plasticized wheat gluten/olive pomace powder biocomposite: Effect of powder content and chemical modifications", [national] Materials & Design , Elsevier B.V.

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2013

Physico-chemical characterisation and antioxidant activity of some Opuntia ficus-indica varieties grown in North Algeria

The composition and the antioxidant activity of the juicy pulp of four Opuntia ficus-indica varieties (green, yellow, orange and red) grown in North Algeria were investigated. The juicy pulp was characterized by a high humidity (87.4 to 89.6%), high pH (6.2 to 6.6), low acidity (0.04 to 0.07%), a few amount of proteins (0.35 to 0.49%) and high amount of solid soluble compounds (12 to 15%). Among the four varieties, the orange variety showed higher values concerning the last parameters. The same variety was also richer in phenolic compounds with 66.60 mg AGE/100 g, carotenoids (2.65 mg eq. β-carotene/100 g) and betaxanthin (6.79 mg/100 g). High ascorbic acid content has been recorded (28.76 mg AAE/100 g). However, betacyanin and total betalains contents were obtained in red juicy pulp. Following this rich composition in antioxidants, the four varieties studied showed performances in reducing iron F3+, inhibiting hydrogen peroxide and decreasing the DPPH concentration by 50%. The best activities were obtained with the orange juicy pulp extract followed by the red one. In addition, direct relationship was noticed between the antioxidant and antiradical capacities of the ethanol extracts and the phenolic compounds concentration and also within the three activities.
Citation

M. HAMAOUI Yasmina, Chougui Nadia, Louaileche Hayette, Mohedeb Safia, Mouloudj Yasmina, Tamendjari Abderezak, , (2013), "Physico-chemical characterisation and antioxidant activity of some Opuntia ficus-indica varieties grown in North Algeria", [national] AFRICAN JOURNAL OF BIOTECHNOLOGY , Academic Journals

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