Detailed Information on Publication Record
2006
Non-catalytic remediation of aqueous solutions by microwave-assisted photolysis in the presence of H2O2
KLÁN, Petr and Martin VAVŘÍKBasic 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
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10401 Organic chemistry
Country of publisher
Netherlands
Confidentiality degree
není předmětem státního či obchodního tajemství
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
Tags
International impact
Změněno: 23/6/2009 15:18, prof. RNDr. Petr Klán, Ph.D.
V originále
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.
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.
Links
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