Abstract：
Bromophenols (BrPs) are artificial precursors of some flame retardants and important substances with natural marine- or ocean-like flavors. This study studied the temporal variations and spatial distributions of BrPs in 150 mollusk samples (12 species) collected from 9 cities around the Bohai Sea from 2009 to 2019. Only 3 B.P. among the tested 19 congeners, 4-monobromophenol (4-mBrP), 2,4-dibromophenol (2,4-diBrP), and 2,4,6-tribromophenol (2,4,6-triBrP), were extensively detected with the detection frequency of 98.7 %, 86.7 %, and 98.0 %. The median concentration of 2,4,6-triBrP was 4.27 ng/g dw, followed by 4-mBrP (1.89 ng/g dw) and 2,4-diBrP (0.625 ng/g dw). The concentration of 3 detectable congeners, ∑3BrPs\' ranged from 0.152 to 703 ng/g dw with a median value of 8.08 ng/g dw. The highest concentrations of ∑3BrPs and 2,4,6-triBrP all occurred in Rapana venosa (49.2 and 45.1 ng/g dw) which belongs to Muricidae (2009 to 2019) that was at a relatively higher trophic level among the tested mollusks. The concentration of BrPs in Gastropoda is much higher than that in Bivalvia. The median concentrations of 2,4-diBrP, 2,4,6-triBrP, and ∑3BrPs in Gastropoda and Bivalvia from Shandong Province were higher than those in other administrative divisions at the provincial level because of the large volume of BrP production and brominated flame retardants. Temporal variations in Gastropoda and Bivalvia from Weihai showed that concentrations of ∑3BrPs, 2,4,6-triBrP, 4-mBrP, and 2,4-diBrP declined slowly from 2009 to 2019. Our results provide a systematic insight into the environmental occurrence and fate of BrPs in the Bohai Sea.
摘要：
溴酚类（BrPs）是某些阻燃剂的人造前体，是具有天然海洋或海洋风味的重要物质。这项研究研究了2009年至2019年从渤海9个城市收集的150个软体动物样品（12种）中BrPs的时间变化和空间分布。在测试的19种同源物中只有3种BrP，4-一溴苯酚（4-mBrP），2,4-二溴苯酚(2,4-diBrP),和2,4,6-三溴苯酚（2,4,6-三BrP），被广泛检测到，检测频率为98.7%，86.7%,和98.0％。2,4,6-三BrP的中值浓度为4.27ng/gdw，其次是4-mBrP（1.89ng/gdw）和2,4-diBrP（0.625ng/gdw）。3种可检测同源物的浓度，∑3BrPs的范围为0.152至703ng/gdw，中位数为8.08ng/gdw。∑3BrPs和2,4,6-triBrP的最高浓度均发生在Rapanavenosa（49.2和45.1ng/gdw）中，属于Muricidae（2009年至2019年），在测试的软体动物中处于相对较高的营养水平。腹足纲动物中的BrPs浓度远高于Bivalvia。2,4-diBrP的中值浓度，2,4,6-triBrP,山东省腹足类和Bivalvia的∑3BrPs高于省级其他行政区划，因为BrP产量和溴化阻燃剂量大。威海腹足类和Bivalvia的时间变化表明，∑3BrPs的浓度，2,4,6-triBrP,4-mBrP,2,4-diBrP从2009年到2019年缓慢下降。我们的结果为渤海BrPs的环境发生和命运提供了系统的见解。
