Simultaneous time-resolved aqueous haloamine measurement enable analysis of disinfectant degradation kinetics and by-product formation
Citation:
Brodfuehrer, S., D. Blomdahl, D. Wahman, G. Speitel, Jr., P. Mistztal, AND L. Katz. Simultaneous time-resolved aqueous haloamine measurement enable analysis of disinfectant degradation kinetics and by-product formation. Nature Water. Nature Portfolio, Berlin, Germany, 2:434-442, (2024). https://doi.org/10.1038/s44221-024-00227-4
Impact/Purpose:
The environmental or health problem addressed by the study: Measurement of haloamines in drinking water A general description of the work and results: A new methed was developed and validated to measure real-time haloamine concentrations in drinking water The long-term importance or significance of the findings: The method will allow better development of haloamine models to understand disinfectant residual reactions and disinfection byproduct formating in drinking water systems, including the impacts when bromide is present. Who would be interested in or could apply the results (e.g. program or regional partners, general public, local communities): Researchers and drinking water utilities trying to haloamine chemistry in drinking water.
Description:
Kinetic models for the redox chemistry of disinfectant decay and toxic disinfection byproduct formation are essential to ensure water quality and protect public health; however, analytical limits have hindered model development. Proton transfer time of flight mass spectrometry (PTR-ToF-MS) was used to monitor aqueous concentrations of five haloamines relevant to chloramine disinfection, the second most common disinfectant. We demonstrate the technique, designed for measuring gas phase compounds, can measure aqueous concentrations of halaomines with a sensitivity 1 to 3 orders of magnitude greater than other methods and monitor reaction kinetics in real time. The application of PTR-ToF-MS to monitor disinfection kinetics will significantly aid the development of comprehensive kinetic models for disinfection and opens a new range of applications for PTR-ToF-MS for measuring aqueous concentrations of volatile compounds.
URLs/Downloads:
DOI: Simultaneous time-resolved aqueous haloamine measurement enable analysis of disinfectant degradation kinetics and by-product formation