N-nitrosodimethylamine (NDMA) formation during ozonation of wastewater and water treatment polymers

Massimiliano Sgroi, Paolo Roccaro, Gregg Oelker, Shane A Snyder

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

N-Nitrosodimethylamine (NDMA) formation by ozonation was investigated in the effluents of four different wastewater treatment plants destined for alternative reuse. Very high levels of NDMA formation were observed in wastewaters from treatment plants non operating with biological nitrogen removal. Selected experiments showed that hydroxyl radical did not have a significant role in NDMA formation during ozonation of wastewater. Furthermore, ozonation of three different polymers used for water treatment, including polyDADMAC, anionic polyacrylamide, and cationic polyacrylamide, spiked in wastewater did not increase the NDMA formation. Effluent organic matter (EfOM) likely reduced the availability of ozone in water able to react with polymers and quenched the produced ·OH radicals which limited polymer degradation and subsequent NDMA production. Excellent correlations were observed between NDMA formation, UV absorbance at 254 nm, and total fluorescence reduction. These data provide evidence that UV and fluorescence surrogates could be used for monitoring and/or controlling NDMA formation during ozonation.

Original languageEnglish (US)
Pages (from-to)1618-1623
Number of pages6
JournalChemosphere
Volume144
DOIs
StatePublished - Feb 1 2016

Fingerprint

Dimethylnitrosamine
Ozonization
Water Purification
Waste Water
Water treatment
Wastewater treatment
water treatment
Polymers
polymer
Wastewater
Polyacrylates
wastewater
Effluents
fluorescence
Fluorescence
effluent
Nitrogen removal
hydroxyl radical
absorbance
Biological materials

Keywords

  • Fluorescence
  • Hydroxyl radical
  • Nitrification
  • Polyacrylamide
  • PolyDADMAC
  • UV absorbance

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemistry(all)

Cite this

N-nitrosodimethylamine (NDMA) formation during ozonation of wastewater and water treatment polymers. / Sgroi, Massimiliano; Roccaro, Paolo; Oelker, Gregg; Snyder, Shane A.

In: Chemosphere, Vol. 144, 01.02.2016, p. 1618-1623.

Research output: Contribution to journalArticle

Sgroi, Massimiliano ; Roccaro, Paolo ; Oelker, Gregg ; Snyder, Shane A. / N-nitrosodimethylamine (NDMA) formation during ozonation of wastewater and water treatment polymers. In: Chemosphere. 2016 ; Vol. 144. pp. 1618-1623.
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