The effect of competitive cations and anions on ion exchange of heavy metals

V. J. Inglezakis, A. A. Zorpas, M. D. Loizidou, H. P. Grigoropoulou

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)

Abstract

In the present study, the effects of competitive cations NH 4+, K+, Ca2+, Na+, Mg2+ and Li+ and co-anions Cl- and Br - on ion exchange of heavy metals Pb2+, Fe3+, Cr3+ and Cu2+ on clinoptilolite is examined. The presence of cations and anions in the solutions of heavy metals is reducing the removal of the latter and the order of decreasing negative effect is the following: NH4+ > Mg2+ > Ca2+ > Na+ > K+ > Li+ and Br- > Cl- for Pb2+, NH4+ > K + > Ca2+ > Na+, Mg2+ ≈ Li+ and Br- > Cl- for Cr3+, NH4+ > K+ > Na+ > Ca 2+ > Li+ > Mg2+ and Cl- > Br- for Fe3+ and Ca2+ > NH4 + > Li+ > K+ > Na+ > Mg2+ and Cl- > Br- for Cu2+. In all cases, the selectivity of clinoptilolite for heavy metals is the following: Pb2+ > Fe3+ > Cr3+ ≥ Cu2+.

Original languageEnglish
Pages (from-to)202-207
Number of pages6
JournalSeparation and Purification Technology
Volume46
Issue number3
DOIs
Publication statusPublished - Nov 15 2005

Keywords

  • Anion complexes
  • Clinoptilolite
  • Competitive cations
  • Heavy metals
  • Ion exchange

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation

Fingerprint Dive into the research topics of 'The effect of competitive cations and anions on ion exchange of heavy metals'. Together they form a unique fingerprint.

Cite this