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National Repository of Grey Literature

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	Photochemical Degradation of Polybrominated Diphenyl Ethers in Micro Photo Reactor Vajglová, Zuzana ; Veselý, M. ; Křišťál, Jiří ; Vychodilová, Hana ; Tříska, Jan ; Jiřičný, Vladimír Most authors used for their studies of technical decaBDE mixture, or pure congener BDE 209. Very few studies used the technical octaBDE mixtures or pentaBDE, or congener BDE 47, which are most abundantly represented in the environment. Photodegradation of PBDE by catalysis over nanoporous TiO2 in microwave field showed very positive results. Debromination of BDE 209 after 240 minutes was very high and reached 99% (from initial value of 14 125 ng/mL). Lower brominated congeners including the tri brominated congener BDE 28 were safely determined. Fulltext: content.csg - PDF Plný tet: SKMBT_C22012102413500 - PDF Detailed record
	Liquidation of Brominated Flame Retardants from Waste Water Vajglová, Zuzana ; Vychodilová, Hana ; Kotas, Petr ; Jiřičný, Vladimír In this work we focused on the degradation method with a high potential for degradation of polybrominated diphenyl ethers from liquid waste. Very good results were achieved with the chemical degradation methods using nanostructured iron. Electrochemical method gave the best results of degradation of PBDE. Within the frame of this work we have used for the first time an electrochemical microreactor whose application in this context has not been described in the literature. The obtained original experimental results confirm the significantly higher efficiency and speed of degradation in comparison with the classic electrochemical reactor and chemical methods of PBDE degradation. Fulltext: PDF Detailed record
	Chemical Reduction of Flame Retardants by Zero Valent Nanoiron Vajglová, Zuzana ; Vychodilová, Hana ; Kotas, Petr ; Jiřičný, Vladimír Fulltext: content.csg - PDF Plný tet: 20120221210243 - PDF Detailed record
	Degradation of Polybrominated Diphenyl Ethers Vajglová, Zuzana ; Vychodilová, Hana ; Kotas, Petr ; Kaštánek, František ; Jiřičný, Vladimír In order to decrease the environmental impact of PBDE’s and to stop their spread in the food chain, the different degradation methods have been investigated. One of the relatively newly developed methods for the degradation of polybrominated diphenyl ethers is a method of electrochemical degradation. Electrochemically generated hydrogen atoms are more reactive, even under much milder conditions than the conventional method of reducing degradation of polybrominated diphenyl ethers. Fulltext: PDF Detailed record
	Dehalogenation of Polybrominated Diphenylethers Vajglová, Zuzana ; Veselý, Martin ; Vychodilová, Hana ; Kaštánek, František ; Maléterová, Ywetta ; Jiřičný, Vladimír ; Tříska, Jan Two methods for the degradation of PBDEs were evaluated in this study. The chemical NZVI (nano zerovalent iron) degradation yielded very good results. The best results, however, were achieved by electrochemical degradation. A new electrochemical method that had not been previously reported in the literature was developed. The method employs an electrochemical microreactor. The original experimental results confirm the significantly higher efficiency and degradation rate of PBDEs when using an electrochemical microreactor. Detailed record
	Polybrominated Diphenyl Ethers –Design and Validation of Models for Photodegradation Veselý, Martin ; Žabová, Hana ; Kaštánek, František ; Ponec, Robert ; Jiřičný, Vladimír Presented study predict ways of PBDE degradation using different methods – photodegradation, degradation with zero-valent metal and electrochemical degradation. Thermodynamic properties of all congeners were evaluated for predicting the degradation behavior. These properties were in this study by quantum-chemical calculations, using a semi empirical method AM1. The PBDE properties from the quantum-chemical calculation were also used to predict the wavelength of maximum absorbance, the octanol-water distribution coefficient and the gas chromatography retention times of all PBDE congeners. Detailed record

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