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Formation mechanism and control strategies of N-nitrosodimethylamine (NDMA) formation during ozonation

Song, Yang ; Feng, Sha ; Qin, Wen ; Li, Juan ; Guan, Chaoting ; Zhou, Yang ; Gao, Yuan ; Zhang, Zhong ; Jiang, Jin

The Science of the total environment, 2022-06, Vol.823, p.153679-153679, Article 153679 [Periódico revisado por pares]

Netherlands: Elsevier B.V

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  • Título:
    Formation mechanism and control strategies of N-nitrosodimethylamine (NDMA) formation during ozonation
  • Autor: Song, Yang ; Feng, Sha ; Qin, Wen ; Li, Juan ; Guan, Chaoting ; Zhou, Yang ; Gao, Yuan ; Zhang, Zhong ; Jiang, Jin
  • Assuntos: Control strategies ; N-nitrosodimethylamine (NDMA) ; Ozonation ; Precursors ; Real waters
  • É parte de: The Science of the total environment, 2022-06, Vol.823, p.153679-153679, Article 153679
  • Notas: ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-3
    content type line 23
    ObjectType-Review-1
  • Descrição: This review summarizes major findings over the last decade related to N-nitrosodimethylamine (NDMA) formed upon ozonation, which was regarded as highly toxic and carcinogenic disinfection by-products. The reaction kinetics, chemical yields and mechanisms were assessed for the ozonation of potential precursors including dimethylamine (DMA), N,N-dimethylsulfamide, hydrazines, N-containing water and wastewater polymers, dyes containing a dimethylamino function, N-functionalized carbon nanotubes, guanidine, and phenylurea. The effects of bromide on the NDMA formation during ozonation of different types of precursors were also discussed. The mechanism for NDMA formation during ozonation of DMA was re-summarized and new perspectives were proposed to assess on this mechanism. Effect of hydroxyl radicals (•OH) on NDMA formation during ozonation was also discussed due to the noticeable oxidation of NDMA by •OH. Surrogate parameters including nitrate formation and UV254 after ozonation may be useful parameters to estimate NDMA formation for practical application. The strategies for NDMA formation control were proposed through improving the ozonation process such as ozone/hydrogen peroxide, ozone/peroxymonosulfate and catalytic ozonation process based on membrane pores aeration (MEMBRO3X). [Display omitted] •NDMA precursors and NDMA formation mechanism during ozonation were summarized.•Ozone oxidation pathway mainly resulted in NDMA formation rather than •OH.•The reaction kinetics and NDMA yields were assessed for the ozonation of precursors.•New perspectives are proposed to evaluate the reaction mechanism of ozone with DMA.•The strategies for NDMA formation control in water treatment are proposed.
  • Editor: Netherlands: Elsevier B.V
  • Idioma: Inglês
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