Journal
BIORESOURCE TECHNOLOGY
Volume 160, Issue -, Pages 24-31Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.12.053
Keywords
Adsorption; Thermodynamics; Heavy metal; Dye; Equilibrium
Funding
- National Science Foundation of China [51278128, 51108093]
- National Science Council (NSC)
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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. (C) 2013 Elsevier Ltd. All rights reserved.
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