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Study on the Absorption and Metabolism of Decabromodiphenyl Ether in Organism

Author: ZhaoZuo
Tutor: LiangShuXuan；ZhaoXingRu
School: Hebei University
Course: Applied Chemistry
Keywords: Polybrominated diphenyl ethers Gas chromatography - negative chemical ionization - mass spectrometry E-waste Biological Samples Enrichment Metabolize
CLC: X501
Type: Master's thesis
Year: 2008
Downloads: 33
Quote: 0
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Abstract


PBDE (Polybrominated diphenyl ethers, PBDEs) are brominated flame retardants (Brominated flame retardants, BFRs) a group of compounds, widely used because of its excellent flame retardant properties. Are detected in various environmental media, in vivo and human tissue PBDE environmental security issues attracted the attention of scientists, government agencies and the public. PBDE bromine (penta), octa (octa) and Deca three commodities (DECA), the main component of penta-and octa goods ubiquitous in the environment and have similar PCBs persistent lipophilic and bioaccumulative, generally detected in human tissues, has now been banned in the EU production. Deca product is still in use, despite the European Union after 10 years of risk assessment to determine decabromodiphenyl ether as a flame retardant does not pose a risk to humans and the environment, it has not been the focus of controversy of the environmental community. This article decabromodiphenyl oxide enrichment in vivo metabolism studies. On the basis of previous work, for the simultaneous determination the DecaBDE environmental biological samples of 42 congeners analysis methods, with strict quality control and quality assurance analysis step, the method is simple, purification effect. low cost. And the use of the method of analysis of PBDEs in biological samples of the e-waste dismantling areas and low-dose BDE209 in experimental animals Africa the Xenopus (Xenopus. laevis) tadpole and frog body enrichment and metabolic. First, the electronic waste dismantling areas in biological samples PBDE pollution, the results show that the region have serious PBDE contamination and pollution characteristics of electrical and electronic products Deca-BDE do flame retardants consistent. Using principal component analysis (Principal component analysis PCA) method near the e-waste scattered chicken tissues and organs of PBDEs results of further analysis, combined with the pollution of the wild frog tissues and organs to study the conditions, the results show that the organizations enrichment capacity; organ PBDE has the BDE209 the highest content in the muscle, and pollution characteristics in the environmental media, available muscle tissue as an indicator of in vivo PBDEs pollution. After low doses of BDE209 in the laboratory exposed Xenopus laevis tadpoles exposed from the 46/47 stage tadpoles to complete metamorphosis end; Stop dosing were measured after every 12 hours metabolism. The results show that BDE209 can be enriched in Xenopus body, is also found that BDE209 in Xenopus body metabolism to lower brominated diphenyl ethers. DecaBDE environmental safety issues that need further research.

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > General issues > Source of environmental pollution
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