Oxidation of metal-diethylenetriaminepentaacetate (DTPA)--complexes during drinking water ozonation.

  title={Oxidation of metal-diethylenetriaminepentaacetate (DTPA)--complexes during drinking water ozonation.},
  author={Konrad Stemmler and G D Glod and Urs von Gunten},
  journal={Water research},
  volume={35 8},
This study investigates the oxidative transformation of diethylenetriaminepentaacetate (DTPA), a synthetic ligand, during drinking water ozonation. The rate coefficients for the reactions of CaDTPA3- and ZnDTPA3- with ozone were determined to be 6200 and 3500 +/- 150 M-1 s-1, respectively. The reactivity of Fe(III)DTPA2- towards ozone was found to be much lower (< 10 M-1 s-1), but near neutral pH the reactivity of the Fe(III)-complexes is dominated by [Fe(III)(OH)]DTPA3-. For the reaction of Fe… CONTINUE READING


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