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Photodebromination of Opaque Slurries Using Titania-Coated Mercury Electrodeless Discharge Lamps.

SYSNO ASEP	0461703
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Ostatní články
Title	Photodebromination of Opaque Slurries Using Titania-Coated Mercury Electrodeless Discharge Lamps.
Author(s)	Kaštánek, František (UCHP-M)_{RID, SAI, ORCID} Církva, Vladimír (UCHP-M)_{RID, ORCID, SAI} Kmentová, Hana (UCHP-M) Kaštánek, P. (CZ) Šolcová, Olga (UCHP-M)_{RID, ORCID, SAI}
Source Title	Journal of Multidisciplinary Engineering Science and Technology - ISSN 2458-9403 Roč. 3, č. 7 (2016), s. 5262-5267
Number of pages	6 s.
Language	eng - English
Country	DE - Germany
Keywords	photocatalysis ; electrodeless discharge lamp ; polybrominated diphenyl ethers
Subject RIV	CI - Industrial Chemistry, Chemical Engineering
R&D Projects	TA04020700 GA TA ČR - Technology Agency of the Czech Republic (TA ČR)
Institutional support	UCHP-M - RVO:67985858
Annotation	Degradation of decabromodiphenyl ether (BDE209) dissolved in n-hexane and in the mixture of n-hexane with water and microglass beads using microwave assisted photoreaction was examined. A novel electrodeless discharge lamp coated with titania oxide (anatase) and placed in a microwave field directly in a bulk of suspension was used to generate UV/Vis radiation. This method enhances penetration of UV/Vis light. Positive microwave effects (probably only heat effects) compensate relatively low irradiance intensity of UV/Vis generated in a microwave field. The rate of BDE209 congener debromination was high and reaction efficiency after 240 minutes of BDE209 dehalogenation exceeded 99% even with high concentrations of 10 000 ng/mL. Similarly, the pathway of PBDE photodebromination by successive losses of bromine atoms was confirmed as the main initial pathway, in some cases also influenced by PBDE substitution patterns. Lower brominated congeners, including BDE28, were determined.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2017

Number of the records: 1