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Formation of NDMA and Halogenated DBPs by Chloramination of Tertiary Amines: The Influence of Bromide Ion
Abstract : The formation of NDMA and other DBPs (including THMs, HANs, HKs) has been investigated by chloramination of several tertiary amines in the absence and in the presence of bromide ion. NDMA formation from the most reactive tertiary amines (e.g. dimethylaminomethylfurfuryl alcohol or DMP30) was enhanced in the presence of bromide due to the formation of brominated oxidant species such as bromochloramine (NHBrCl) and the hypothetical UDMH-Br as an intermediate. The formation of NDMA by chloramination of less reactive model compounds was inhibited in the presence of bromide. This can be explained by competitive reactions leading to the production of brominated DBPs (i.e. THMs). In the presence of bromide, the formation of brominated THMs during chloramination can be attributed to the presence of small amounts of HOBr produced by the decomposition of chloramines and bromamines. The results are of particular interest to understand NDMA formation mechanisms, especially during chloramination of wastewaters impacted by anthropogenic tertiary amines and containing bromide ion.
Littérature citée [21 références]
https://hal-enpc.archives-ouvertes.fr/hal-01201586
Contributeur : Julien Le Roux <>
Soumis le : jeudi 17 septembre 2015 - 15:46:55
Dernière modification le : samedi 28 mars 2020 - 01:37:21
Archivage à long terme le : : mardi 29 décembre 2015 - 08:31:40
Contributeur : Julien Le Roux <>
Soumis le : jeudi 17 septembre 2015 - 15:46:55
Dernière modification le : samedi 28 mars 2020 - 01:37:21
Archivage à long terme le : : mardi 29 décembre 2015 - 08:31:40
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