Evaluation of Preformed Monochloramine Reactivity with Processed Natural Organic Matter and Scaling Methodology Development for Concentrated Waters.

Autor:	Kennicutt AR; York College of Pennsylvania, York, Pennsylvania 17403, United States.; National Research Council Research Associateship Programs, Postdoctoral Research Associate, Cincinnati, Ohio 45268, United States., Rossman PD; Greater Cincinnati Water Works, Cincinnati, Ohio 45232, United States.; Oak Ridge Institute for Science and Education, Post-Masters Research Fellow, Cincinnati, Ohio 45268, United States., Bollman JD; Church & Dwight Co., Inc., York, Pennsylvania 17408, United States.; Pegasus Technical Services Inc., Cincinnati, Ohio 45219, United States., Aho T; Jacobs, Cincinnati, Ohio 45241, United States.; Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45219, United States., Abulikemu G; Pegasus Technical Services Inc., Cincinnati, Ohio 45219, United States.; Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45219, United States., Pressman JG; United States Environmental Protection Agency, Office of Research and Development, Cincinnati, Ohio 45268, United States., Wahman DG; United States Environmental Protection Agency, Office of Research and Development, Cincinnati, Ohio 45268, United States.
Jazyk:	angličtina
Zdroj:	ACS ES&T water [ACS ES T Water] 2022 Oct 28; Vol. 2 (12), pp. 2431-2440.
DOI:	10.1021/acsestwater.2c00292
Abstrakt:	To evaluate natural organic matter (NOM) processing impacts on preformed monochloramine (PM) reactivity and as a first step in creating concentrated disinfection byproduct (DBP) mixtures from PM, a rational methodology was developed to proportionally scale PM NOM-related demand in unconcentrated source waters to waters with concentrated NOM. Multiple NOM preparations were evaluated, including a liquid concentrate and reconstituted lyophilized solid material. Published kinetic models were evaluated and used to develop a focused reaction scheme (FRS) that was relatively simple to implement and focused on monochloramine loss, including considerations for inorganic chloramine stability (i.e., autodecomposition) and bromide and iodide impacts. The FRS included critical reaction pathways and accurately simulated (without modification) monochloramine experimental data with and without bromide and iodide present over a range of PM-dosed NOM-free waters. For NOM-containing waters, addition of two NOM reactions in the FRS allowed (i) apportioning monochloramine loss to either inorganic or NOM-related reactions and (ii) selecting experiment conditions to provide an equivalent monochloramine NOM-related demand in unconcentrated and concentrated waters. The methodology provides a framework for future experimentation to evaluate DBP scaling and their speciation in concentrated water matrices when providing an equivalent NOM-related monochloramine demand in unconcentrated and concentrated matrices. Competing Interests: The authors declare no competing financial interest.
Databáze:	MEDLINE
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