KLÁN, Petr and Martin VAVŘÍK. Non-catalytic remediation of aqueous solutions by microwave-assisted photolysis in the presence of H2O2. Journal of Photochemistry and Photobiology A: Chemistry. Amsterdam, The Netherlands: Elsevier Science, 2006, vol. 177, No 1, p. 24-33. ISSN 1010-6030.
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Basic information
Original name Non-catalytic remediation of aqueous solutions by microwave-assisted photolysis in the presence of H2O2
Name in Czech Nekatalytická remediace vodných roztoků
Authors KLÁN, Petr (203 Czech Republic, guarantor) and Martin VAVŘÍK (203 Czech Republic).
Edition Journal of Photochemistry and Photobiology A: Chemistry, Amsterdam, The Netherlands, Elsevier Science, 2006, 1010-6030.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10401 Organic chemistry
Country of publisher Netherlands
Confidentiality degree is not subject to a state or trade secret
Impact factor Impact factor: 2.098
RIV identification code RIV/00216224:14310/06:00016573
Organization unit Faculty of Science
UT WoS 000233950800005
Keywords in English photochemistry
Tags Photochemistry
Tags International impact
Changed by Changed by: prof. RNDr. Petr Klán, Ph.D., učo 32829. Changed: 23/6/2009 15:18.
Abstract
Advanced oxidation processes have emerged as potentially powerful methods to transform organic pollutants in aqueous solutions into nontoxic substances. In this work, a comparison of degradation dynamics of five aromatic compounds (phenol, chlorobenzene, nitrobenzene, 4-chlorophenol, and pentachlorophenol) in aqueous solutions by non-catalytic UV, MW, and combined MW/UV remediation techniques in the presence of H2O2 is presented. Relative degradation rate constants have been monitored and the major products were identified. The combined degradation effect of UV and MW radiation was found larger than the sum of isolated effects in all cases studied. It is concluded that such an overall efficiency increase is essentially based on a thermal enhancement of subsequent oxidation reactions of the primary photoreaction intermediates. Optimizations revealed that this effect is particularly significant in samples with a low concentration of H2O2, however, a larger excess of H2O2 was essential to complete the destruction in most experiments. The absence of heterogeneous catalysts was in no doubt an additional advantage of the technique applied.
Abstract (in Czech)
Advanced oxidation processes have emerged as potentially powerful methods to transform organic pollutants in aqueous solutions into nontoxic substances. In this work, a comparison of degradation dynamics of five aromatic compounds (phenol, chlorobenzene, nitrobenzene, 4-chlorophenol, and pentachlorophenol) in aqueous solutions by non-catalytic UV, MW, and combined MW/UV remediation techniques in the presence of H2O2 is presented. Relative degradation rate constants have been monitored and the major products were identified. The combined degradation effect of UV and MW radiation was found larger than the sum of isolated effects in all cases studied. It is concluded that such an overall efficiency increase is essentially based on a thermal enhancement of subsequent oxidation reactions of the primary photoreaction intermediates. Optimizations revealed that this effect is particularly significant in samples with a low concentration of H2O2, however, a larger excess of H2O2 was essential to complete the destruction in most experiments. The absence of heterogeneous catalysts was in no doubt an additional advantage of the technique applied.
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MSM0021622413, plan (intention)Name: Proteiny v metabolismu a při interakci organismů s prostředím
Investor: Ministry of Education, Youth and Sports of the CR, Proteins in metabolism and interaction of organisms with the environment
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