Science Inventory

You are here:

EPA Home » Science Inventory » Reactions of thiocarbamate, triazine and urea herbicides, RDX and benzenes on EPA Contaminant Candidate List with ozone and with hydroxyl radicals

Reactions of thiocarbamate, triazine and urea herbicides, RDX and benzenes on EPA Contaminant Candidate List with ozone and with hydroxyl radicals

Contact

http://cfpub.epa.gov/si/si_public_comments.cfm

Citation:

CHEN, W. R., C. Wu, M. ELOVITZ, K. LINDEN, AND I. H. SUFFET. Reactions of thiocarbamate, triazine and urea herbicides, RDX and benzenes on EPA Contaminant Candidate List with ozone and with hydroxyl radicals . M. Henze (ed.), WATER RESEARCH. Elsevier Science Ltd, New York, NY, 42(1-2):137-144, (2008).

Impact/Purpose:

to provide information

Description:

Second-order rate constants of the direct ozone reactions (kO3,M) and the indirect OH radical reactions (kOH,M) for nine chemicals on the US EPA’s Drinking Water Contaminant Candidate List (CCL) were studied during the ozonation and ozone/hydrogen peroxide advanced oxidation process (O3/H2O2 AOP) using batch reactors. Except for the thiocarbamate herbicides, all other CCL chemicals show low reactivity toward ozone. The general magnitude of ozone reactivity of the CCL chemicals can be explained by their structures and the electrophilic nature of ozone reactions. Except for RDX, the CCL chemicals are highly reactive toward OH radicals demonstrated by high kOH,M values. Therefore, ozonation at low pH, which involves mainly the direct ozone reaction, is only efficient for the removal of the thiocarbamates. Ozonation at high pH and (O3/H2O2 AOP) will be highly efficient for the treatment of the chemicals in this study except for RDX, which shows the lowest OH radical reactivity.

Record Details:

Record Type:DOCUMENT( JOURNAL/ PEER REVIEWED JOURNAL)
Product Published Date:01/01/2008
Record Last Revised:04/17/2008
OMB Category:Other
Record ID: 163967