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Ozonation of the complexing agent ethylenediaminetetra(methylenephosphonic acid) (EDTMP) was studied with bench-scale experiments. As it turned out that EDTMP is totally oxidized within a few seconds, a mechanism for the reaction of EDTMP with ozone is presented which predicts the formation of the herbicide N-phosphonomethylglycine (glyphosate) and its major metabolite aminomethylphosphonic acid (AMPA). The experimental results confirm the predicted mechanism as well as the formation of glyphosate and AMPA during ozonation of waters containing EDTMP.
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Klinger et al. (1998) studied this question.
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