Thermodynamic parameters for adsorption equilibrium of heavy metals and dyes from wastewaters

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)24-31
Journal / PublicationBioresource Technology
Publication statusPublished - May 2014
Externally publishedYes


This meta-analysis evaluates adsorption studies that report thermodynamic parameters for heavy metals and dyes from wastewaters. The adsorbents were derived from agricultural waste, industrial wastes, inorganic particulates, or some natural products. The adsorption mechanisms, derivation of thermodynamic relationships, and possible flaws made in such evaluation are discussed. This analysis shows that conclusions from the examined standard enthalpy and entropy changes are highly contestable. The reason for this flaw may be the poor physical structure of adsorbents tested, such that pore transport controlled the solute flux, leaving a surface reaction process near equilibrium. © 2013 Elsevier Ltd.

Research Area(s)

  • Adsorption, Dye, Equilibrium, Heavy metal, Thermodynamics

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