Identification of Monochloro-Nonabromodiphenyl Ethers in the Air and Soil Samples from South China

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• 作者：Zhiqiang Yu ; Kewen Zheng ; Guofa Ren ; Decheng Wang ; Shengtao Ma ; Pingan Peng ; Minghong Wu ; Guoying Sheng ; Jiamo Fu
• 刊名：Environmental Science & Technology
• 出版年：2011
• 出版时间：April 1, 2011
• 年：2011
• 卷：45
• 期：7
• 页码：2619-2625
• 全文大小：878K
• 年卷期：v.45,no.7(April 1, 2011)
• ISSN：1520-5851

文摘

Several studies have indicated that mixed brominated/chlorinated organic compounds could be formed during the thermal process such as the incineration of municipal solid waste and open burning of unregulated e-waste at recycling areas. In this study, air particles and soils from e-waste recycling areas, as well as outdoor and indoor air particles from urban Guangzhou, were collected and pooled for the identification of mixed chlorinated/brominated diphenyl ethers (PXDEs). Three monochloro-nonabromo diphenyl ethers (Cl-nonaBDEs), including 6鈥?Cl-BDE-206, 5鈥?Cl-BDE-207, and/or 4鈥?Cl-BDE-208, were first structurally identified in these air and soil samples. The identification was done by comparison of retention times in chromatograms of pure reference compounds and environmental samples, as well as by comparison with full-scan mass spectra data in electron capture negative ionization mode. Because of their similar physical鈭抍hemical properties, 4鈥?Cl-BDE-208 and 5鈥?Cl-BDE-207 absolutely coeluted, even on a nonpolar DB-5 column. Further investigation is still needed to clarify these findings. Nevertheless, the results indicated that Cl-nonaBDEs would occur in various environmental matrices. Because the replacement of Br by Cl will change the physical鈭抍hemical properties of PBDE analogues, environmental occurrence, fate, and transport, the potential toxicity of PXDEs should be investigated.