John Wiley & Sons, Ltd.

Polybrominated diphenyl ethers and new polybrominated flame retardants in tree bark from western areas of China

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Tree bark samples were collected from 15 sites across Western China in 2013, and the polybrominated diphenyl ether (PBDE) and new polybrominated flame retardant (NBFR) concentrations in the samples were determined. The mean total PBDE concentration was 51.8 ng/g lipid weight (lw), 85.2–99.4% lower than Chinese eastern coastal areas and the E‐waste recycling areas, BDE209 was the dominant PBDE congener, and its mean concentration was 49 ng/g lw. The mean 2,3,5,6‐tetrabromo‐p‐xylene, pentabromobenzene, pentabromotoluene, and hexabromobenzene concentrations were 0.61, 0.97, 0.68, and 0.68 ng/g lw, respectively. The PBDE and NBFR concentrations in the air at the sampling sites were estimated from the concentrations in the tree bark samples. The estimated mean total PBDE and total NBFR concentrations in air were 58.5 and 2.76 pg/m3, respectively. The sources of NBFR emissions were found to be different from the sources of PBDE emissions for no relationship was found between the NBFR and PBDE concentrations, and it appeared that sources of measured HBB, PBBz, and PBT in tree bark in Western China include industrial activity related to the aluminum industry. This article is protected by copyright. All rights reserved

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