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Tytuł:
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Peracetic Acid-Ruthenium(III) Oxidation Process for the Degradation of Micropollutants in Water.
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Autorzy:
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Li R; Program for the Environment and Sustainability, Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, 212 Adriance Lab Road, College Station, Texas 77844, United States.
Manoli K; Program for the Environment and Sustainability, Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, 212 Adriance Lab Road, College Station, Texas 77844, United States.
Kim J; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
Feng M; Program for the Environment and Sustainability, Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, 212 Adriance Lab Road, College Station, Texas 77844, United States.
Huang CH; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
Sharma VK; Program for the Environment and Sustainability, Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, 212 Adriance Lab Road, College Station, Texas 77844, United States.
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Źródło:
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Environmental science & technology [Environ Sci Technol] 2021 Jul 06; Vol. 55 (13), pp. 9150-9160. Date of Electronic Publication: 2021 Jun 15.
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Typ publikacji:
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Journal Article; Research Support, U.S. Gov't, Non-P.H.S.
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Język:
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English
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Imprint Name(s):
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Publication: Washington DC : American Chemical Society
Original Publication: Easton, Pa. : American Chemical Society, c1967-
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MeSH Terms:
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Ruthenium*
Water Pollutants, Chemical*
Ferric Compounds ; Hydrogen Peroxide ; Oxidation-Reduction ; Peracetic Acid ; Water
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Contributed Indexing:
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Keywords: acetyl(per)oxyl radicals; activation; advanced oxidation processes; degradation; peracetic acid; pharmaceuticals; phosphate; ruthenium
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Substance Nomenclature:
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0 (Ferric Compounds)
0 (Water Pollutants, Chemical)
059QF0KO0R (Water)
7UI0TKC3U5 (Ruthenium)
BBX060AN9V (Hydrogen Peroxide)
I6KPI2E1HD (Peracetic Acid)
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Entry Date(s):
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Date Created: 20210615 Date Completed: 20210712 Latest Revision: 20210712
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Update Code:
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20240104
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DOI:
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10.1021/acs.est.0c06676
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PMID:
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34128639
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This paper presents an advanced oxidation process (AOP) of peracetic acid (PAA) and ruthenium(III) (Ru(III)) to oxidize micropollutants in water. Studies of PAA-Ru(III) oxidation of sulfamethoxazole (SMX), a sulfonamide antibiotic, in 0.5-20.0 mM phosphate solution at different pH values (5.0-9.0) showed an optimum pH of 7.0 with a complete transformation of SMX in 2.0 min. At pH 7.0, other metal ions (i.e., Fe(II), Fe(III), Mn(II), Mn(III), Co(II), Cu(II), and Ni(II)) in 10 mM phosphate could activate PAA to oxidize SMX only up to 20%. The PAA-Ru(III) oxidation process was also unaffected by the presence of chloride and carbonate ions in solution. Electron paramagnetic resonance (EPR) measurements and quenching experiments showed the dominant involvement of the acetyl(per)oxyl radicals (i.e., CH 3 C(O)O • and CH 3 C(O)OO • ) for degrading SMX in the PAA-Ru(III) oxidation process. The transformation pathways of SMX by PAA-Ru(III) were proposed based on the identified intermediates. Tests with other pharmaceuticals demonstrated that the PAA-Ru(III) oxidation system could remove efficiently a wide range of pharmaceuticals (9 compounds) in the presence of phosphate ions in 2.0 min at neutral pH. The knowledge gained herein on the effective role of Ru(III) to activate PAA to oxidize micropollutants may aid in developing Ru(III)-containing catalysts for PAA-based AOPs.
