Non-catalytic remediation of aqueous solutions by microwave-assisted photolysis in the presence of H2O2

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F06%3A00016573" target="_blank" >RIV/00216224:14310/06:00016573 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Non-catalytic remediation of aqueous solutions by microwave-assisted photolysis in the presence of H2O2

Original language description

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 ofsubsequent 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

Czech name

Nekatalytická remediace vodných roztoků

Czech description

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 ofsubsequent 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

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CC - Organic chemistry

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2006

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Photochemistry and Photobiology A: Chemistry

ISSN

1010-6030

e-ISSN

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Volume of the periodical

177

Issue of the periodical within the volume

1

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

24-33

UT code for WoS article

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EID of the result in the Scopus database

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