Dechlorination of PCBs in Aqueous Extracts from Soils Contaminated by PCBs by Application of Zero-valent Nano-iron in Statu Nascendi. Influence of Microwaves on the Rate of Reaction

0345502 - ÚCHP 2011 IT eng J - Článek v odborném periodiku
Kaštánek, František - Maléterová, Ywetta - Šolcová, Olga - Kaštánek, P.
Dechlorination of PCBs in Aqueous Extracts from Soils Contaminated by PCBs by Application of Zero-valent Nano-iron in Statu Nascendi. Influence of Microwaves on the Rate of Reaction.
ENT Magazine. Roč. 1, č. 1 (2010), s. 50-56
Grant CEP: GA AV ČR KAN400720701; GA ČR GA104/09/0694
Klíčová slova: nano-Fe * PCB * reductive dechlorination
Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství

We followed the efficiency of dehalogenation of less chlorinated biphenyls in aqueous solution while reacting with particles of nano-iron. The aqueous solution was prepared by the washing of a real sample of soil, long-term contaminated by poly-chlorinated biphenyls, with the commercial mixture Delor 103.Particles of nano-Fe were prepared fresh by mixing a solution of sodium borohydride and ferrous sulfate. The efficiency of lowering the content of chlorinated congeners contained in the contaminated water was high,on average 73% and increases when increase the molar ratio of NaBH4/Fe2+.Reaction of the created nano-particles with PCB was followed also under the influence of a microwave field. The effect of simultaneous activity of a micro-wave field on the efficiency of reductive dehalogenation was minimal, microwaves.Efficiency of dehalogenation of PCB using microwaves increased, on average, to 78 per cent, compared to trials without the use of microwaves.
Trvalý link: http://hdl.handle.net/11104/0186760