Precursors and Control of Halogenated Acetonitriles
Abstract
Haloacetonitriles (HANs) are a class of nitrogenous disinfection byproducts that can form during disinfection of water with chlorine or monochloramine. HANs have been shown to be more cytotoxic and genotoxic than their regulated counterparts, trihalomethanes and haloacetic acids. The goal of this project is to determine the sources and types of HAN precursors, identify precursor structures and formation pathways, and evaluate HAN degradation behavior in order to provide guidance to utilities on controlling HANs in drinking water and potable reuse systems.
Project Updates
Reporting Period: November 15, 2021 - August 15, 2022
Reporting Period: August 1, 2021 – October 31, 2021. During this period, the team tested a few diverse waters to determine conditions that would meet criteria for a universal halogenated acetonitrile (HAN) precursor test.
Reporting Period: August 15, 2020 – March 15, 2021. Most of the work during this reporting period concerned Task 1, the literature review; and Task 2, the establishment of a formation test that can be used for all haloacetonitrile (HAN) analytes.
