Identification of the Halogenated Compounds Resulting from the 1997 Plastimet Inc. Fire in Hamilton, Ontario, using Comprehensive Two-Dimensional Gas Chromatography and (Ultra)High Resolution Mass Spe

详细信息    查看全文

• 作者：Sujan Fernando ; Karl J. Jobst ; Vince Y. Taguchi ; Paul A. Helm ; Eric J. Reiner ; Brian E. McCarry
• 刊名：Environmental Science & Technology
• 出版年：2014
• 出版时间：September 16, 2014
• 年：2014
• 卷：48
• 期：18
• 页码：10656-10663
• 全文大小：387K
• ISSN：1520-5851

文摘

Between July 9鈥?2, 1997, at least 400 tonnes of polyvinyl chloride (PVC) were consumed in a fire at the Plastimet Inc. plastics recycling facility in Hamilton, Ontario, Canada. This led to the release of contaminants, including highly toxic polychlorinated dibenzo-p-dioxins (PCDD) and dibenzofurans (PCDF). This study re-examines a composite soil sample collected shortly after the fire using state-of-the-art FT-ICR (Fourier transform ion cyclotron resonance) and GC 脳 GC-TOF (comprehensive two-dimensional gas chromatography-time-of-flight) mass spectrometry. The FT-ICR experiments led to the identification of approximately 150 molecular formulas, corresponding to chlorinated and mixed chloro/bromo compounds. The majority of these are halogenated polycyclic aromatic hydrocarbons (halo-PAHs), including highly substituted (e.g., C₁₄HCl₉ and C₁₆HCl₉) and high molecular weight (e.g., C₂₈H₁₂Cl₄) Cl-PAHs that have not been reported previously in environmental samples. Complementary GC 脳 GC-TOF experiments resolved individual halo-PAHs, some of which were confirmed with available standards. The concentrations of the most abundant halo-PAH groups, C₁₄H₈Cl₂ (22 渭g/g) and C₁₆H₈Cl₂ (20 渭g/g) are much higher than reported dioxin values and comparable to the corresponding PAH groups C₁₄H₁₀ (12 渭g/g) and C₁₆H₁₀ (19 渭g/g). The high abundance of the halo-PAHs identified in this study highlights the need for further investigation into their environmental occurrence and risk.