Reductive debromination of nonabrominated diphenyl ethers by sodium borohydride and identification of octabrominated diphenyl ether products
2011 (English)In: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 82, no 6, 839-846 p.Article in journal (Refereed) Published
A method was developed to study reductive transformation of highly brominated diphenyl ethers (BDEs). The method development is a part of a broader project where it will be used to determine the susceptibility of environmental pollutants to reductive conditions, in an attempt to create a scheme for determination of chemical’s persistence. This paper focuses on identification of octabrominated diphenyl ether transformation products from reductive debromination of the three nonabrominated diphenyl congeners (nonaBDE), BDE-206, -207 and -208. Sodium borohydride was used to explore the reductive debromination of the nonaBDEs. The transformation products were collected at two time-points and identified products were quantified by GC–MS. The reduction of the nonaBDEs lead primarily to debrominated products, mainly octaBDEs. The three nonabrominated DEs gave isomer-related transformation product patterns. BDE-207 and BDE-208 showed a propensity for ortho-debromination in the initial reaction step, while no discrimination between initial debromination positions was seen for BDE-206. All three nonabrominated DEs displayed a preferred initial debromination on the fully brominated DE ring.
Place, publisher, year, edition, pages
2011. Vol. 82, no 6, 839-846 p.
NonaBDEs, OctaBDEs, Reactivity, Stability, BFR, Persistence
Research subject Environmental Chemistry
IdentifiersURN: urn:nbn:se:su:diva-57334DOI: 10.1016/j.chemosphere.2010.11.022ISI: 000287337800008OAI: oai:DiVA.org:su-57334DiVA: diva2:415310