Photosensitized oxidation as a tool for degradation of harmful substances in water solutions

• Autorzy: Gryglik D. , Miller J.S.

Warianty tytułu

PL

Fotosensybilizowane utlenianie jako sposób degradacji szkodliwych substancji w środowisku wodnym

• Języki publikacji: EN

Abstrakty

EN

The applicability of photochemical process involving singlet molecular oxygen (102) in the field of environmental protection was considered. 102 was generated via energy transfer from dye sensitizer excited by visible light to ground stale oxygen (302). The photosensitized oxidation was applied for degradation of 2-chlorophenol (2-CP), a common model organic pollutant, and ingredient of many pesticides. The 2-CP decomposition in, an aqueous solution was studied using various sensitizers in two types of reactions: in the homogeneous system with a solubilized sensitizer and in the heterogeneous system with a sensitizer immobilized in silane gel covering the glass reactor walls. In both systems the influence of various experimental conditions (light intensity, the amount of sensitizer, oxygen concentration) on the rate of 2-CP degradation was investigated. Finally, the possibility of using sunlight for decomposition of 2-CP in aqueous solutions both in homo- and heterogeneous system was demonstrated.

PL

Badano sensybilizowane fotoutleniania, pod kątem rozpoznania możliwości jego zastosowania do degradacji szkodliwych zanieczyszczeń w środowisku wodnym. W procesie zastosowano różne sensybilizatory w postaci roztworu oraz immobilizowane w żelu silanowym na szklanym podłożu. Efektywność procesu określano przez szybkość rozkładu 2-chlorofenolu w różnych warunkach natlenienia i naświetlania roztworu reakcyjnego. Sprawdzono również możliwość degradacji 2-chlorofenolu w procesie sensybilizowanego utleniania pod działaniem promieniowania słonecznego.

Słowa kluczowe

EN

photosensitized oxidation; singlet oxygen; 2-chlorophenol; rose bengal; methylene blue; chlorine e6; sol-gel technique; immobilization in silane gel

PL

fotosensybilizowane utlenianie; tlen singletowy; 2-chlorofenol; róż bengalski; błękit metylenowy; chloryn e6; technika zol-żel; immobilizacja w żelu silanowym

• Wydawca: Towarzystwo Chemii i Inżynierii Ekologicznej
• Czasopismo: Chemia i Inżynieria Ekologiczna
• Rocznik: 2005
• Tom: Vol. 12, nr 9
• Strony: 977--987
• Opis fizyczny: Bibliogr. 21 poz. 7 rys.

Twórcy

autor

Gryglik D.

• Faculty of Process and Environmental Engineering, Technical University of Łódź, ul. Wólczańska 213, 93-005 Łódź, tel. [phone]

autor

Miller J.S.

• Faculty of Process and Environmental Engineering, Technical University of Łódź, ul. Wólczańska 213, 93-005 Łódź, tel. [phone]

• Faculty of Process and Environmental Engineering, Technical University of Łódź, ul. Wólczańska 213, 93-005 Łódź, tel. [phone],

Bibliografia

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