The European Physical Journal Special Topics

, Volume 226, Issue 5, pp 993–1000 | Cite as

Sorption isotherms and isosteric heats of sorption of mint variety (Mentha viridis) leaves and stems: Experimental and mathematical investigations

  • Fatima TaoufikEmail author
  • Miloud El Hadek
  • Moulay Chrif Hnini
  • M’Barek Benchanaa
  • Mustapha El Hammioui
  • Lala Mina Idrissi Hassani
Regular Article
Part of the following topical collections:
  1. Phase Equilibria and Their Applications


Knowledge of sorption isotherms of agricultural products is necessary to control rehydration/dehydration and storage processes. The aim of this work is to determine moisture adsorption and desorption isotherms of Moroccan mint leaves and stems (Mentha viridis). The sorption isotherms of the plants was determined within the range of 0.0549–0.964 relative air humidity at three different temperatures (40, 50 and 60 C) using saturated salt solutions method. Guggenheim, Anderson and Boer (GAB) model was used to describe the experimental data. The isosteric heats of desorption and adsorption were determined. Then, the isosteric heat of desorption was compared to the isosteric heat of adsorption and both decreased continuously with increasing the equilibrium moisture content. Finally, the comparison between the sorption net isosteric of mint leaves and stems was studied.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    M. Lasich, D. Ramjugernath, Influence of unlike dispersive interactions on methane adsorption in graphite: a grand canonical Monte Carlo simulation and classical density functional theory study, Eur. Phys. J. B. 88, 313 (2015)ADSCrossRefGoogle Scholar
  2. 2.
    S. Timoumi, F. Zagrouba, D. Mihoubi, M.M. Tlili, Experimental study and modelling of water sorption/desorption isotherms on two agricultural products: Apple and carrot, J. Phys. IV France 122, 235 (2004)CrossRefGoogle Scholar
  3. 3.
    C. Van den Berg, S. Bruin, Water activity and its estimation in food systems: theoretical aspects, in Water Activity: Influence on Food Quality, edited by L.B. Rockland, G.E. Stewart (Academic Press, New York, 1981), p. 45Google Scholar
  4. 4.
    E.A. Guggenheim, N.K. Adam, The thermodynamics of adsorption at the surface of solutions, Proc. R. Soc. Lond. A. 139, 218 (1933)ADSCrossRefzbMATHGoogle Scholar
  5. 5.
    W.E.L. Spiess, W. Wolf, Critical evaluation of methods to determine moisture sorption isotherms, in Water Activity: Theory and Applications to Food, edited by L.B. Rockland, L.R. Beuchat (Marcel Dekker, New York, Basel, 1987)Google Scholar
  6. 6.
    W. Wolf, W.E.L. Spiess, G. Jung, Standardization of isotherm measurement (COST project 90 and 90 bis), in Properties of Water in Foods, edited by D. Simatos, J.L. Multon (Martinus Nijhoff Publishers, Dordrecht, The Netherlands, 1985), pp. 661–679Google Scholar
  7. 7.
    L. Greenspan, Humidity fixed points of binary saturated aqueous solutions, J. Res. Natl. Bur. Stand. Sect. A 81A, 89 (1977)CrossRefGoogle Scholar
  8. 8.
    F. London, Properties and applications of molecular forces, Zeitschrift für Physikalische Chemie B 11, 222 (1930)Google Scholar
  9. 9.
    S. Naumov, R. Valiullin, P. Galvosas, J. Kärger, P.A. Monson, Diffusion hysteresis in mesoporous materials, Eur. Phys. J. Special Topics 141, 107 (2007)CrossRefGoogle Scholar
  10. 10.
    E. Tsami, Z.B. Maroulis, D. Marinos-Kouris, G.D. Saravacos Heat sorption of water in dried fruits, Int. J. Food Sci. Technol. 25, 350 (1990)CrossRefGoogle Scholar
  11. 11.
    M.C. Hnini, M. Benchanaa, M. El. Hammioui, Study of the interaction between water and Gelidium sesquipedale (Rhodophyta). Part I: Thermodynamic aspect of the sorption equilibrium, J. Taiwan Inst. Chem. Eng. 44, 795 (2013)CrossRefGoogle Scholar
  12. 12.
    N. Wang, J.G. Brennan, Moisture sorption isotherm characteristics of potatoes at four temperatures, J. Food Eng. 14, 269 (1991)CrossRefGoogle Scholar

Copyright information

© EDP Sciences and Springer 2017

Authors and Affiliations

  1. 1.Laboratory of Chemical Engineering, Department of Chemistry, Faculty of Science, University IBN ZOHRAgadirMorocco
  2. 2.“REMATOP” Laboratory, Semlalia Faculty of Science, Caddi Ayyad University, Prince My Abdellah Boulevard40000 MarrakechMorocco
  3. 3.Plant Biotechnology Laboratory, Planta South Team, Department of Biology. Faculty of Science, University IBN ZOHRAgadirMorocco

Personalised recommendations