Adsorption equilibrium of heavy metals and dyes from wastewater with low-cost adsorbents: A review

Attinti Ramesh, Duu Jong Lee*, Jonathan W C Wong

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

16 Citations (Scopus)


This review surveyed recent publications on the adsorption uptakes of heavy metals and dyes from water and wastewater streams using low-cost adsorbents derived from agricultural waste, industrial wastes, inorganic particulates, or some natural products. Most adsorption works adopted either the Langmuir or Freundlich isotherms (or both) for adsorption data correlation. Despite a few exceptions, the waste-derived adsorbents have lower adsorption uptakes than the activated carbon. However, the cheapness of the former represents the major advantage for possible applications. Effects of process parameters, such as temperature and pH, on and the possible mechanisms to metals or dyes adsorption were addressed in some detail. We also highlighted the compensation effects during thermodynamic parameter evaluation, which were possibly overlooked in current literature.

Original languageEnglish
Pages (from-to)203-222
Number of pages20
JournalJournal of the Chinese Institute of Chemical Engineers
Issue number3
Publication statusPublished - May 2005

Scopus Subject Areas

  • Chemistry(all)
  • Chemical Engineering(all)

User-Defined Keywords

  • Adsorption
  • Dye
  • Equilibrium
  • Heavy metal
  • Low-cost adsorbent


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