NDLI: Effects of molecular ozone and hydroxyl radical on formation of <i>N</i>-nitrosamines and perfluoroalkyl acids during ozonation of treated wastewaters

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Contents list

Research highlights: advances and challenges in developing mainstream anammox treatment

Potable reuse of water

Water recycling in Australia – during and after the drought

International research agency perspectives on potable water reuse

The osmotic membrane bioreactor: a critical review

Bioanalytical tools: half a century of application for potable reuse

Closing the urban water loop: lessons from Singapore and Windhoek

Rapid direct injection LC-MS/MS method for analysis of prioritized indicator compounds in wastewater effluent

Triple bottom line costs for multiple potable reuse treatment schemes

Target screening of chemicals of concern in recycled water

Effects of molecular ozone and hydroxyl radical on formation of N-nitrosamines and perfluoroalkyl acids during ozonation of treated wastewaters

Human health risk associated with direct potable reuse – evaluation through quantitative relative risk assessment case studies

Online fluorescence monitoring of RO fouling and integrity: analysis of two contrasting recycled water schemes

Modeling approaches to predict removal of trace organic compounds by ozone oxidation in potable reuse applications

Applying the water safety plan to water reuse: towards a conceptual risk management framework

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Environmental Science: Water Research & Technology Vol - 1 Issue - 4

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Environmental Science: Water Research & Technology Vol - 1 Issue - 2

Environmental Science: Water Research & Technology Vol - 1 Issue - 1

Effects of molecular ozone and hydroxyl radical on formation of N-nitrosamines and perfluoroalkyl acids during ozonation of treated wastewaters

Content Provider	Royal Society of Chemistry (RSC)
Author	Pisarenko, Aleksey N. Dickenson, Eric R. V. Gerrity, Daniel Marti, Erica J. Peller, Julie R.
Copyright Year	2015
Abstract	N-Nitrosamines—toxic disinfection byproducts commonly associated with chloramination—have recently been shown to increase after ozonation of some surface waters and treated wastewaters. In addition to five nitrosamines, two perfluoroalkyl acids (PFAAs) are included in the most recent U.S. EPA Contaminant Candidate List due to potential public health risks. In this manuscript, the potential roles of molecular ozone (O3) and hydroxyl radical (˙OH) were investigated in the formation of N-nitrosamines and PFAAs in treated wastewaters. The results herein are based on controlled bench-scale experiments designed to isolate the effects of O3 with the use of t-butanol as a ˙OH scavenger. Nitrous oxide gas saturated samples were exposed to gamma radiation to isolate the effects of ˙OH, and para-chlorobenzoic acid was used to assess ˙OH exposure. This study found that the presence of molecular ozone versus the hydroxyl radical promoted N-nitrosodimethylamine (NDMA) formation. Six other N-nitrosamines showed very little or no formation upon the ozonation of six treated wastewaters up to an O3 : TOC ratio of 1.0. For PFAAs, perfluorohexanoic acid (PFHxA) formed the highest and most consistently upon ozonation (up to an O3 : TOC ratio of 2.0) of the same six treated wastewaters. Presence of molecular ozone (more so than hydroxyl radical), appears to promote the formation of PFHxA and perfluorobutane sulfonic acid (PFBS). The effect of pH in the range of 6–8 upon the formation of NDMA and PFAAs was found to be minimal. These findings provide new understanding of the formation of oxidation byproducts during ozonation of reclaimed wastewaters. Depending on future regulatory determinations, NDMA and a few PFAAs could be of concern for potable reuse treatment systems that employ ozone.
Starting Page	668
Ending Page	678
Page Count	11
File Format	HTM / HTML PDF
ISSN	20531400
Volume Number	1
Issue Number	5
Journal	Environmental Science: Water Research & Technology
DOI	10.1039/c5ew00046g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	NDMA Ozone Safe Drinking Water Act Public health Hydroxyl radical Tert-Butyl alcohol Scavenger Nitrous oxide Gamma ray Acid N-Nitrosodimethylamine Perfluorobutane
Content Type	Text
Resource Type	Article
Subject	Environmental Engineering Water Science and Technology

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Effects of molecular ozone and hydroxyl radical on formation of N-nitrosamines and perfluoroalkyl acids during ozonation of treated wastewaters

Effect of pre-ozonation on N-nitrosodimethylamine (NDMA) formation from four drinking-water sources during subsequent chloramination

N-nitrosodimethylamine (ndma) as a drinking water contaminant: a review (2003).

Removal of N-nitrosodimethylamine (NDMA) Precursors During Drinking Water Treatment

New N-nitrosodimethylamine (NDMA) precursors that react with ozone: Implications for water reuse

Towards reducing DBP formation potential of drinking water by favouring direct ozone over hydroxyl radical reactions during ozonation.

Factors influencing the photodegradation of N-nitrosodimethylamine in drinking water

Review: Nitrosamines: A review on their prevalence as emerging pollutants and potential remediation options

Propargyloxycarbonyl as a protecting group for the side chains of serine , threonine and tyrosine

Effects of molecular ozone and hydroxyl radical on formation of N-nitrosamines and perfluoroalkyl acids during ozonation of treated wastewaters

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Effect of pre-ozonation on N-nitrosodimethylamine (NDMA) formation from four drinking-water sources during subsequent chloramination

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