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

作者: Wei R. Chen , Changlong Wu , Michael S. Elovitz , Karl G. Linden , I.H. (Mel) Suffet

DOI: 10.1016/J.WATRES.2007.07.037

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摘要: Abstract Second-order rate constants of the direct ozone reactions ( k O 3 , M ) and indirect OH radical OH,M for nine chemicals on US EPA's Drinking Water Contaminant Candidate List (CCL) were studied during ozonation ozone/hydrogen peroxide advanced oxidation process (O /H 2 AOP) using batch reactors. Except thiocarbamate herbicides (molinate EPTC), all other CCL (linuron, diuron, prometon, RDX, 2,4-dinitrotoluene, 2,6-dinitrotoluene nitrobenzene) show low reactivity toward ozone. The general magnitude can be explained by their structures electrophilic nature reactions. (except RDX) are highly reactive radicals as demonstrated high values. Ozonation at pH, which involves mainly reaction, is only efficient removal thiocarbamates. pH AOP will treatment in this study except shows lowest reactivity. Removal a contaminant does not mean complete mineralization reaction byproducts may problem if they recalcitrant likely to cause health concerns.

参考文章(23)
George V. Buxton, Clive L. Greenstock, W. Phillips Helman, Alberta B. Ross, Critical Review of rate constants for reactions of hydrated electrons, hydrogen atoms and hydroxyl radicals (⋅OH/⋅O− in Aqueous Solution Journal of Physical and Chemical Reference Data. ,vol. 17, pp. 513- 886 ,(1988) , 10.1063/1.555805
Fernando J Beltrán, José M Encinar, Miguel A Alonso, None, Nitroaromatic hydrocarbon ozonation in water. 1: Single ozonation Industrial & Engineering Chemistry Research. ,vol. 37, pp. 25- 31 ,(1998) , 10.1021/IE9704253
Purnendu Bose, William H Glaze, D.Scott Maddox, Degradation of RDX by various advanced oxidation processes : II. Organic by-products Water Research. ,vol. 32, pp. 1005- 1018 ,(1998) , 10.1016/S0043-1354(97)00308-4
C.C David Yao, Werner R Haag, Rate constants for direct reactions of ozone with several drinking water contaminants Water Research. ,vol. 25, pp. 761- 773 ,(1991) , 10.1016/0043-1354(91)90155-J
H. Bader, J. Hoigné, Determination of ozone in water by the indigo method Water Research. ,vol. 15, pp. 449- 456 ,(1981) , 10.1016/0043-1354(81)90054-3
Hilla Shemer, Charles M. Sharpless, Michael S. Elovitz, Karl G. Linden, Relative Rate Constants of Contaminant Candidate List Pesticides with Hydroxyl Radicals Environmental Science & Technology. ,vol. 40, pp. 4460- 4466 ,(2006) , 10.1021/ES0602602
Juan L. Acero, Konrad Stemmler, Urs von Gunten, Degradation Kinetics of Atrazine and Its Degradation Products with Ozone and OH Radicals: A Predictive Tool for Drinking Water Treatment Environmental Science & Technology. ,vol. 34, pp. 591- 597 ,(2000) , 10.1021/ES990724E
Wei R. Chen, Charles M. Sharpless, Karl G. Linden, I. H. (Mel) Suffet, Treatment of Volatile Organic Chemicals on the EPA Contaminant Candidate List Using Ozonation and the O3/H2O2 Advanced Oxidation Process Environmental Science & Technology. ,vol. 40, pp. 2734- 2739 ,(2006) , 10.1021/ES051961M
Barbara Barletta, Ezio Bolzacchini, Simone Meinardi, Marco Orlandi, Bruno Rindone, The Kinetics and the Mechanism of the Reaction of 2-chloro-4,6-dialkylamino-1,3,5-triazines with Ozone Ozone-science & Engineering. ,vol. 25, pp. 81- 94 ,(2003) , 10.1080/713610663