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Nontarget and Target Screening of Organohalogen Compounds in Mussels and Sediment from Hiroshima Bay, Japan: Occurrence of Novel Bioaccumulative Substances.
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2020-03-12 , DOI: 10.1021/acs.est.9b06998
Akitoshi Goto 1 , Nguyen Minh Tue 1 , Tomohiko Isobe 2 , Shin Takahashi 1, 3 , Shinsuke Tanabe 1 , Tatsuya Kunisue 1
Affiliation  

Recent screening surveys have shown the presence of unknown halogenated compounds in the marine environment at comparable levels to persistent organic pollutants (POPs). However, their exposure levels and profiles in marine organisms and bioaccumulative potentials remain unclear. The present study performed nontarget/target screening of organohalogen compounds (OHCs) in mussel and sediment samples collected from Hiroshima Bay, Japan, in 2012 and 2018 by using integrated analyses of two-dimensional gas chromatography-high resolution time-of-flight mass spectrometry (GC×GC-HRToFMS) and magnetic sector GC-HRMS. Nontarget analysis by GC×GC-HRToFMS revealed the detection of approximately 60 OHCs including unknown mixed halogenated compounds (UHC-Br3-5Cl) with molecular formulae of C9H6Br3ClO, C9H5Br4ClO, and C9H4Br5ClO in the mussel. Interestingly, UHC-Br3-5Cl concentrations in the mussel samples, which were semi-quantified by GC-HRMS, were comparable to or higher than those of POPs at all the locations surveyed, and their geographical distribution patterns differed from those of other OHCs. These results suggest that UHC-Br3-5Cl are ubiquitous in coastal waters of Hiroshima Bay and derived from a specific source(s). The biota-sediment accumulation factors (BSAFs) of UHC-Br3-5Cl, estimated for a paired sample set of mussel (ng/g lw) and sediment (ng/g TOC), were 1 order of magnitude higher than those for POPs with similar log Kow values, indicating their high bioaccumulative potential.

中文翻译:

日本广岛湾贻贝和沉积物中有机卤素化合物的非目标和目标筛选:新型生物蓄积性物质的发生。

最近的筛选调查表明,海洋环境中存在与持久性有机污染物(POPs)相当的未知卤代化合物。但是,它们在海洋生物中的暴露水平和概况以及生物蓄积潜力仍然不清楚。本研究通过二维气相色谱-高分辨飞行时间质谱的综合分析对2012年和2018年从日本广岛湾采集的贻贝和沉积物样品中的有机卤素化合物(OHC)进行了非目标/目标筛选(GC×GC-HRToFMS)和磁性扇区GC-HRMS。通过GC×GC-HRToFMS进行的非目标分析显示,在贻贝中检测到大约60种OHC,包括分子式为C9H6Br3ClO,C9H5Br4ClO和C9H4Br5ClO的未知混合卤代化合物(UHC-Br3-5Cl)。有趣的是 贻贝样品中的UHC-Br3-5Cl浓度通过GC-HRMS进行了半定量,在所有调查地点均与POPs相当或高于POPs,其地理分布模式与其他OHCs不同。这些结果表明,UHC-Br3-5Cl在广岛湾的沿海水域中普遍存在,并且来源于特定来源。对于成对的贻贝(ng / g lw)和沉积物(ng / g TOC)配对样品,估计UHC-Br3-5Cl的生物沉积物累积因子(BSAFs)比含有POPs的POPs高1个数量级。 log Kow值相似,表明它们具有很高的生物蓄积潜力。而且它们的地理分布模式与其他OHC有所不同。这些结果表明,UHC-Br3-5Cl在广岛湾的沿海水域中普遍存在,并且来源于特定来源。对于成对的贻贝(ng / g lw)和沉积物(ng / g TOC)配对样品,估计UHC-Br3-5Cl的生物沉积物累积因子(BSAFs)比含有POPs的POPs高1个数量级。 log Kow值相似,表明它们具有很高的生物蓄积潜力。而且它们的地理分布模式与其他OHC有所不同。这些结果表明,UHC-Br3-5Cl在广岛湾的沿海水域中普遍存在,并且来源于特定来源。对于成对的贻贝(ng / g lw)和沉积物(ng / g TOC)配对样品,估计UHC-Br3-5Cl的生物沉积物累积因子(BSAFs)比含有POPs的POPs高1个数量级。 log Kow值相似,表明它们具有很高的生物蓄积潜力。
更新日期:2020-03-12
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