Removal of iodinated X-ray contrast media during drinking water treatment

Wolfram Seitz, Jia-Qian Jiang*, Walter H. Weber, Barry J. Lloyd, Matthias Maier, Dietrich Maier

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)


The present study investigates the removal of five iodinated X-ray contrast media (ICM) during drinking water production from surface water at a full-scale water works, which comprises coagulation/flocculation, intermediate ozonation, in-line filtration and adsorption with activated carbon. The elimination rates over all treatment units for the non-ionic ICM (iomeprol, iopromide, iohexol and iopamidol) were determined to be approximately 70%. In particular, intermediate ozonation can remove 30% on average of the non-ionic ICM, whereas it cannot remove the ionic diatrizoic acid, and the granulated activated carbon filters can achieve a further 50% removal of non-ionic ICM. However, over 100 ng L -1 of ionic diatrizoic acid and 40-100 ng L-1 of non-ionic ICM were found in the produced drinking water.

Original languageEnglish
Pages (from-to)35-39
Number of pages5
JournalEnvironmental Chemistry
Issue number1
Publication statusPublished - 2 Mar 2006
Externally publishedYes


  • Persistent pollutants
  • Water treatment

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Environmental Chemistry
  • Geochemistry and Petrology


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