Heavy metal removal from water by sorption using surfactant-modified montmorillonite

Su Hsia Lin*, Ruey Shin Juang

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

568 Scopus citations

Abstract

Removal of Cu2+ and Zn2+ from aqueous solutions by sorption on the montmorillonite modified with sodium dodecylsulfate (SDS) was investigated. Experiments were carried out as a function of solution pH, solute concentration, and temperature (25-55°C). The Dubinin-Kaganer-Radushkevick model was adopted to describe the single-solute sorption isotherms. Also, the binary-solute sorption equilibria could be reasonably predicted by the competitive Langmuir model, in which the Langmuir parameters were directly taken from those obtained in single-solute systems. The thermodynamic parameters (ΔHo and ΔSo) for Cu2+ and Zn2+ sorption on the modified clay were also determined from the temperature dependence. The kinetics of metal ions sorption was examined and the pseudo-first-order rate constant was finally evaluated.

Original languageEnglish
Pages (from-to)315-326
Number of pages12
JournalJournal of Hazardous Materials
Volume92
Issue number3
DOIs
StatePublished - 10 06 2002
Externally publishedYes

Keywords

  • Cu
  • Kinetics
  • Montmorillonite
  • Sodium dodecylsulfate
  • Sorption isotherm
  • Zn

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