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

KLÁN, Petr a 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, roč. 177, č. 1, s. 24-33. ISSN 1010-6030. 2006.

Základní údaje

• Originální název: Non-catalytic remediation of aqueous solutions by microwave-assisted photolysis in the presence of H2O2
• Název česky: Nekatalytická remediace vodných roztoků
• Autoři: KLÁN, Petr (203 Česká republika, garant) a Martin VAVŘÍK (203 Česká republika).
• Vydání: Journal of Photochemistry and Photobiology A: Chemistry, Amsterdam, The Netherlands, Elsevier Science, 2006, 1010-6030.

Další údaje

• Originální jazyk: angličtina
• Typ výsledku: Článek v odborném periodiku
• Obor: 10401 Organic chemistry
• Stát vydavatele: Nizozemské království
• Utajení: není předmětem státního či obchodního tajemství
• Impakt faktor: Impact factor: 2.098
• Kód RIV: RIV/00216224:14310/06:00016573
• Organizační jednotka: Přírodovědecká fakulta
• UT WoS: 000233950800005
• Klíčová slova anglicky: photochemistry
• Štítky: Photochemistry
• Příznaky: Mezinárodní význam

Anotace

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.

Anotace česky

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.

Návaznosti

• MSM0021622413, záměr: Název: Proteiny v metabolismu a při interakci organismů s prostředím

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Proteiny v metabolismu a při interakci organismů s prostředím