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

08:00 EDT 22nd October 2015 | BioPortfolio

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

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/m(3) , 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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Name: Environmental toxicology and chemistry / SETAC
ISSN: 1552-8618
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Medical and Biotech [MESH] Definitions

Compounds that contain two halogenated benzene rings linked via an OXYGEN atom. Many polybrominated diphenyl ethers are used as FLAME RETARDANTS.

Biphenyl compounds which are extensively brominated. Many of these compounds are toxic environmental pollutants.

Materials applied to fabrics, bedding, furniture, plastics, etc. to retard their burning; many may leach out and cause allergies or other harm.

Pyrolysis of organic compounds at the temperature of a hydrogen-air flame to produce ionic intermediates which can be collected and the resulting ion current measured by gas chromatography.

A plant genus in the LAURACEAE family. The tree bark has been used medicinally.

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