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Effect of Ultrasound on Henna Leaves Drying and Extraction of Lawsone: Experimental and Modeling Study

Author

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  • Said Bennaceur

    (Laboratoire de Développement des Energies Renouvelables et leurs Applications dans les zones Sahariennes (LDERAS), Université Tahri Mohamed de Béchar, Bechar 08000, Algeria)

  • Abdelaziz Berreghioua

    (Laboratory of Chemistry and Environmental Science (LCSE), Tahri Mohamed University, Bechar 08000, Algeria)

  • Lyes Bennamoun

    (Department of Mechanical Engineering, University of New Brunswick, Fredericton, NB E3B5A3, Canada)

  • Antonio Mulet

    (ASPA Group, Department of Food Technology, Universitat Politècnica de València, 46022 Valencia, Spain)

  • Belkacem Draoui

    (Laboratoire d’Energétique en Zones Arides, Université Tahri Mohamed de Béchar, Bechar 08000, Algeria)

  • Mostafa Abid

    (Département sciences de la matière, Faculté des sciences exactes, Université Tahri Mohamed de Béchar, Bechar 08000, Algeria)

  • Juan A. Carcel

    (ASPA Group, Department of Food Technology, Universitat Politècnica de València, 46022 Valencia, Spain)

Abstract

The effect of drying temperature and the application of ultrasound on drying kinetics of Lawsonia inermis (henna) leaves and the extraction of lawsone from the dried samples was addressed. Indeed, henna leaves were dried with and without the application of ultrasound (21.7 kHz, 30.8 kW/m 3 ) at 40, 50 and 60 °C with a constant air velocity (1 m/s). As expected, both the increase of temperature and the application of ultrasound decreased the drying time and increased the rate of extraction of the lawsone. The values of the effective diffusion coefficients obtained were used to quantify this influence showing the value increases with higher drying temperature and the application of ultrasound. Moreover, the influence of temperature was quantified by the estimation of the activation energy from an Arrhenius-type equation (46.25 kJ/mol in the case of drying without ultrasound application and 44.06 kJ/mol in the case of ultrasonically-assisted drying). Regarding the influence of studied variables on lawsone extraction yield, the higher is the temperature, the lower is the yield, probably linked with lawsone degradation reaction due to thermal treatment. On the contrary, the application of ultrasound improved the extraction yield mainly at the lower drying temperature tested of 40 °C.

Suggested Citation

  • Said Bennaceur & Abdelaziz Berreghioua & Lyes Bennamoun & Antonio Mulet & Belkacem Draoui & Mostafa Abid & Juan A. Carcel, 2021. "Effect of Ultrasound on Henna Leaves Drying and Extraction of Lawsone: Experimental and Modeling Study," Energies, MDPI, vol. 14(5), pages 1-11, March.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:5:p:1329-:d:508199
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    References listed on IDEAS

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    1. Lahsasni, Siham & Kouhila, Mohammed & Mahrouz, Mostafa & Idlimam, Ali & Jamali, Abdelkrim, 2004. "Thin layer convective solar drying and mathematical modeling of prickly pear peel (Opuntia ficus indica)," Energy, Elsevier, vol. 29(2), pages 211-224.
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