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首页> 外文期刊>Environmental Science & Technology >Unresolved complex mixtures of aromatic hydrocarbons: Thousands of overlooked persistent, bioaccumulative, and toxic contaminants in mussels
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Unresolved complex mixtures of aromatic hydrocarbons: Thousands of overlooked persistent, bioaccumulative, and toxic contaminants in mussels

机译：芳香烃的未解决的复杂混合物：贻贝中成千上万个被忽略的持久性，生物蓄积性和有毒污染物

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摘要

Comprehensive two-dimensional gas chromatography-time-of-flight-mass-spectrometry can be used to resolve and identify individual petroleum-derived hydrocarbons in unresolved complex mixtures (UCMs), such as those accumulated by mussels (Mytilus edulis). Mussels exhibiting a range of scope for growth values were collected from sites around the UK coast. Tissue extracts from mussels exhibiting impaired health contained large amounts of aromatic hydrocarbon UCMs compared to the extracts from healthy mussels. The UCMs (up to 125 mu g g(-1) dry tissue) contained thousands of previously unidentified branched alkyl homologues of known aromatic hydrocarbons such as branched alkylbenzenes (BABs), tetralins (BATs), and indanes and indenes (BINs). The toxicity of few such alkyl branched compounds has been investigated previously, but here we show that a commercial mixture of BABs (C-12-C-14) is toxic to mussels in laboratory tests (11-57 mu g g(-1) dry tissue), reducing feeding rate by up to 40% in 72 h. Thus, some, if not all aromatic UCMs, apparently comprise potent mixtures of persistent, bioaccumulative and toxic compounds which have been overlooked previously.
机译：全面的二维气相色谱-飞行时间质谱法可用于解析和鉴定未分解的复杂混合物（UCM）中的各个石油衍生的烃，例如贻贝（Mytilus edulis）积累的烃。从英国海岸周围的地点收集了显示出一定范围增长价值的贻贝。与健康贻贝的提取物相比，健康受损的贻贝的组织提取物含有大量的芳香烃UCM。 UCM（最多125μg（-1）干组织）包含成千上万个以前未识别的已知芳香烃的支链烷基同系物，例如支链烷基苯（BAB），四氢化萘（BAT）以及茚满和茚满（BINs）。先前已经研究了少数这种烷基支化化合物的毒性，但在这里我们证明，商业上的BAB（C-12-C-14）混合物在实验室测试中对贻贝有毒（11-57 mu gg（-1）干组织），在72小时内将进食率降低40％。因此，一些芳香族UCM，如果不是全部的话，显然包含持久性，生物蓄积性和有毒化合物的有效混合物，这些化合物先前已被忽略。

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