Nuclear magnetic resonance enables understanding of polydiallyldimethylammonium chloride composition and N-nitrosodimethylamine formation during chloramination

Samantha Donovan; Ariel J. Atkinson; Natalia Fischer; Amelia E. Taylor; Johann Kieffer; J. P. Croue; Paul Westerhoff; Pierre Herckes

doi:10.1039/D1EW00091H

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Nuclear magnetic resonance enables understanding of polydiallyldimethylammonium chloride composition and N-nitrosodimethylamine formation during chloramination†

Samantha Donovan,

*^a Ariel J. Atkinson,

^b Natalia Fischer,^b Amelia E. Taylor,^c Johann Kieffer,^d J. P. Croue,^e Paul Westerhoff

^b and Pierre Herckes

Author affiliations

* Corresponding authors

^a School of Molecular Sciences, Arizona State University, Tempe, Arizona, USA
E-mail: sjdonov3@asu.edu

^b School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, Arizona, USA

^c SNF Polychemie, Bay St. Louis, Mississippi, USA

^d SNF SA, Andrezieux Boutheon, France

^e Institut de Chimie des Milieux et Matériaux de Poitiers, UMR CNRS 7285, Université de Poitiers, France

Abstract

Polydiallyldimethyl ammonium chloride (polyDADMAC) is the most commonly used polymer at drinking water treatment plants and has the potential to form nitrosamines, like N-nitrosodimethylamine (NDMA), if free polymer is present during the disinfection process. The composition of polyDADMAC solutions used at the industrial scale is not well understood and is difficult to analyze. This study used ¹H and ¹³C nuclear magnetic resonance (NMR) to analyze the polymer solution composition. Both ¹H and ¹³C NMR are powerful tools that allow study of trace impurities in the solution, structural information such as chain length, and reaction mechanisms. The information garnered through ¹H and ¹³C NMR can be used to mitigate NDMA formation at drinking water treatment plants.

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Article information

DOI: https://doi.org/10.1039/D1EW00091H
Article type: Paper
Submitted: 02 Feb 2021
Accepted: 13 Apr 2021
First published: 13 Apr 2021

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Environ. Sci.: Water Res. Technol., 2021,7, 1050-1059

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Nuclear magnetic resonance enables understanding of polydiallyldimethylammonium chloride composition and N-nitrosodimethylamine formation during chloramination

S. Donovan, A. J. Atkinson, N. Fischer, A. E. Taylor, J. Kieffer, J. P. Croue, P. Westerhoff and P. Herckes, Environ. Sci.: Water Res. Technol., 2021, 7, 1050 DOI: 10.1039/D1EW00091H

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Environmental Science: Water Research & Technology

Nuclear magnetic resonance enables understanding of polydiallyldimethylammonium chloride composition and N-nitrosodimethylamine formation during chloramination†

Abstract

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Nuclear magnetic resonance enables understanding of polydiallyldimethylammonium chloride composition and N-nitrosodimethylamine formation during chloramination

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