Exploiting the ion-exchange ability of titanate nanotubes in a model water softening process

Dániel Madarász, Imre Szenti, András Sápi, János Halász, Ákos Kukovecz, Zoltán Kónya

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Titanate nanotubes were utilized in Ca2+ and Mg2+ removal in a continuous ion-exchange unit. Three consecutive water softening-regeneration cycles were performed. The highest measured value of the total ion-exchange capacity was 1.2 mmol g-1 which decreased to 0.66 mmol g-1 in the third cycle. The capacity loss was due to the irreversible binding of Ca2+ ions to very strong adsorption sites, while the Mg2+/Na+ exchange was reversible. A relatively fast initial adsorption step and a subsequent slower concentration decrease were the two processes that governed the kinetics of the ion exchange reaction.

Original languageEnglish
Pages (from-to)161-165
Number of pages5
JournalChemical Physics Letters
Volume591
DOIs
Publication statusPublished - Jan 20 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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