The concentrations and relative distributions of 27 polybrominated diphenyl ethers (PBDEs) and 17 methoxylated (MeO-) and 8 hydroxylated (OH-) BDEs were determined in marine environments including sediments, bivalves, and seawater along the southern coast of South Korea to understand their fates and possible formation mechanisms. The relative and substituent distributions of the PBDEs and their structural analogues varied according to the characteristics of the media. PBDEs were dominant in marine sediments and seawater, whereas MeO-BDEs made the highest contributions in bivalves. Similar patterns were previously identified in inland environments in Korea, except in river water where OH-BDEs were dominant. The natural formation of structural analogues might be the main mechanism in marine, as ortho-substituted naturally occurring MeO- and OH-BDEs were dominant in all media and seemed to be more produced than in inland environments. In addition, the higher concentrations of meta-substituted MeO-BDEs nearshore than offshore was observed. This is the first study comparing marine (near- and offshore) and inland to understand the differences in their fate and possible formation mechanisms in each environmental conditions.

中文翻译：

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海洋环境中的多溴二苯醚及其结构类似物：与多种环境相比的命运和预期形成机制

在韩国南部沿海的沉积物，双壳类动物和海水等海洋环境中测定了27种多溴联苯醚（PBDEs）和17种甲氧基化（MeO-）和8种羟基化（OH-）BDE的浓度和相对分布，以了解它们的浓度。命运和可能的形成机制。多溴二苯醚及其结构类似物的相对和取代基分布会根据介质的特性而变化。PBDEs在海洋沉积物和海水中占主导地位，而MeO-BDEs在双壳类动物中贡献最大。以前在韩国的内陆环境中发现了类似的模式，但在河水中，OH-BDEs占主导地位。结构类似物的天然形成可能是海洋中的主要机制，因为邻位取代的天然存在的MeO-和OH-BDE在所有介质中均占主导地位，并且比内陆环境生产的多。另外，观察到近岸的间位取代的MeO-BDEs的浓度高于近岸的位置。这是首次比较海洋（近海和近海）和内陆的研究，以了解它们在每种环境条件下的命运和可能的形成机制的差异。