PMID: 18200856Jan 19, 2008Paper

Photochemical degradation of PCBs in snow

Environmental Science & Technology
Nina MatykiewiczováPetr Klán

Abstract

This work represents the first laboratory study known to the authors describing photochemical behavior of persistent organic pollutants in snow at environmentally relevant concentrations. The snow samples were prepared by shock freezing of the corresponding aqueous solutions in liquid nitrogen and were UV-irradiated in a photochemical cold chamber reactor at -25 degrees C, in which simultaneous monitoring of snow-air exchange processeswas also possible. The main photodegradation pathway of two model snow contaminants, PCB-7 and PCB-153 (c approximately 100 ng kg(-1)), was found to be reductive dehalogenation. Possible involvement of the water molecules of snow in this reaction has been excluded by performing the photolyses in D2O snow. Instead, trace amounts of volatile organic compounds have been proposed to be the major source of hydrogen atom in the reduction, and this hypothesis was confirmed by the experiments with deuterated organic cocontaminants, such as d6-ethanol or d8-tetrahydrofuran. It is argued that bimolecular photoreduction of PCBs was more efficient or feasible than any other phototransformations under the experimental conditions used, including the coupling reactions. The photodegradation of PCBs, however, com...Continue Reading

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Citations

Dec 14, 2011·Environmental Science & Technology·Torsten MeyerFrank Wania
Nov 11, 2011·Environmental Science & Technology·Debajyoti RayPetr Klán
Oct 1, 2013·Environmental Science & Technology·Olga GarmashDerek C G Muir
Mar 23, 2010·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Anthony AndradyRichard G Zepp
Jan 22, 2011·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·R G ZeppB Sulzberger
Dec 4, 2015·Environmental Science & Technology·Christine SteinlinKonrad Hungerbühler
Sep 24, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Anna ZelmerPetr Klán
Mar 15, 2011·Environmental Pollution·Glenn A RowlandAmanda M Grannas
Jun 1, 2016·Environmental Science & Technology·Agnieszka Krzemińska, Piotr Paneth
Feb 4, 2014·Environmental Science. Processes & Impacts·Jonathan P Bower, Cort Anastasio
Mar 27, 2018·Environmental Science and Pollution Research International·Linke GeZiwei Yao
Oct 23, 2009·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Alena Kubatova
Oct 23, 2008·Environmental Science & Technology·Andrew S CampbellAndrew A Gewirth
Jul 17, 2021·Environmental Science and Pollution Research International·Honghai XueXiaojian Tang
Jul 8, 2014·Environmental Science & Technology·Christine SteinlinKonrad Hungerbühler
Mar 17, 2015·Chemical Reviews·Christian GeorgeSergey A Nizkorodov
Nov 18, 2017·Environmental Science & Technology·Pablo CorrochanoPetr Klán
Aug 28, 2020·The Journal of Organic Chemistry·Xiting ZhangDavid Lee Phillips
Jun 20, 2014·The Journal of Physical Chemistry. a·Rafał KaniaPetr Klán

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