N-nitrosodimethylamine (NDMA) precursors leach from nanofiltration membranes

Mahmut Selim Ersan, David A. Ladner, Tanju Karanfil

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Membrane filtration processes have been widely used as effective means of providing safe and reliable water for both potable and nonpotable purposes. In our laboratory, we have observed that N-nitrosodimethylamine (NDMA) precursors leach from virgin membranes. Therefore, in this study, we aimed to examine (i) the potential leaching of NDMA precursors from different types of nanofiltration membranes and (ii) membrane cleaning techniques using different types of background solutions to prevent the leaching. The results showed that for three different types of nanofiltration membranes, leaching of high levels of NDMA precursors (∼180-450 ng/L) was observed. Leaching continued even after membranes had been washed with ∼3900 L of distilled deionized water/m2. Among various cleaning techniques, washing the membrane with a 1 mg/L Cl2 solution was found to be the most effective for reducing the extent of NDMA precursor leaching.

Original languageEnglish (US)
Pages (from-to)66-69
Number of pages4
JournalEnvironmental Science and Technology Letters
Volume2
Issue number3
DOIs
StatePublished - Mar 10 2015
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Chemistry
  • Ecology
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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