Evaluation of thermodynamic parameters for adsorption of heavy metals by green adsorbents
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Thermodynamic parameters ΔG°, ΔH° and ΔS° are indicators of the possible nature of adsorption. This review summarizes the thermodynamic properties of metal adsorption by green adsorbents. Conclusively, the adsorption of heavy metals ions by green adsorbents is spontaneous in most cases (ΔG° < 0). Since the thermodynamic parameters were evaluated from very different adsorbent/adsorbate combinations, it is not possible to note a correlation between the corresponding enthalpy change (ΔH°) and entropy change (ΔS°) following adsorption.
KeywordsFree energy Enthalpy Entropy Green adsorbents Spontaneous
- Güzel F, Yakut H, Topal G (2008) Determination of kinetic and equilibrium parameters of the batch adsorption of Mn(II), Co(II), Ni(II) and Cu(II) from aqueous solution by black carrot (Daucus carota L.) residues. J Hazard Mater 153:1275–1287. https://doi.org/10.1016/j.jhazmat.2007.09.087 CrossRefGoogle Scholar
- Prado AGS, Moura AO, Holanda MS, Carvalho TO, Andrade RDA, Pescara IC, de Oliveira AHA, Okino EYA, Pastore TCM, Silva DJ, Zara LF (2010) Thermodynamic aspects of the Pb adsorption using Brazilian sawdust samples: removal of metal ions from battery industry wastewater. Chem Eng J 160:549–555. https://doi.org/10.1016/j.cej.2010.03.066 CrossRefGoogle Scholar
- Sahmoune MN (2018a) Chapter 6: thermodynamic properties of heavy metals ions adsorption by green adsorbents. In: Crini G, Lichtfouse E (eds) Green adsorbents for pollutant removal. Environmental chemistry for a sustainable world 18. Springer, Berlin, pp 193–213. https://doi.org/10.1007/978-3-319-92111-2_6 CrossRefGoogle Scholar
- Senthil Kumar P, Ramalingam S, Kirupha SD, Murugesan A, Vidhyadevi T, Sivanesan S (2011) Adsorption behavior of nickel(II) onto cashew nut shell: equilibrium, thermodynamics, kinetics, mechanism and process design. Chem Eng J 167:122–131. https://doi.org/10.1016/j.cej.2010.12.010 CrossRefGoogle Scholar