Thermodynamic parameters for adsorption equilibrium of heavy metals and dyes from wastewaters
Journal
Bioresource Technology
Journal Volume
160
Pages
24-31
Date Issued
2014
Author(s)
Liu X.
Abstract
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.
Subjects
Adsorption; Dye; Equilibrium; Heavy metal; Thermodynamics
SDGs
Other Subjects
Agricultural robots; Agricultural wastes; Dyeing; Dyes; Heavy metals; Industrial wastes; Phase equilibria; Surface reactions; Thermodynamics; Adsorption equilibria; Adsorption mechanism; Adsorption studies; Inorganic particulates; Physical structures; Standard enthalpy; Thermodynamic parameter; Thermodynamic relationships; Adsorption; copper ion; dye; heavy metal; methylene blue; coloring agent; heavy metal; waste water; water pollutant; adsorption; biotechnology; dye; enthalpy; entropy; equilibrium; heavy metal; meta-analysis; sewage treatment; solute transport; thermodynamics; adsorption; agricultural waste; article; enthalpy; entropy; equilibrium constant; industrial waste; meta analysis (topic); priority journal; thermodynamics; waste water; adsorption; chemistry; isolation and purification; thermodynamics; waste water; water pollutant; Adsorption; Coloring Agents; Metals, Heavy; Thermodynamics; Waste Water; Water Pollutants, Chemical
Type
journal article