Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden.
Environ Sci Technol. 2010 Dec 1;44(23):9189-94. doi: 10.1021/es1023288. Epub 2010 Oct 28.
In the present study the accumulation potentials in earthworms (Eisenia fetida) of selected brominated flame retardants (BFRs) were investigated. The tested BFRs, including polybrominated diphenyl ethers (PBDEs), hexabromobenzene (HBB), and 1,2-dibromo-4-(1,2-dibromoethyl)cyclohexane (TBECH), were found to be bioavailable to Eisenia fetida, and they accumulated in the earthworms. To our knowledge, this is the first published study to address the bioaccumulation potential of TBECH in terrestrial biota. Aging the soil resulted in decreased accumulation of TBECH, HBB, and PBDEs with six or less bromine atoms. However, no effect of soil aging was seen for BDEs 183 or 209, possibly due to their low mobility in soil. The use of different soils (artificial OECD soil and two natural Swedish soils) also affected the degree of accumulation in the worms. The results indicate that use of the generally accepted standard OECD soil may overestimate accumulation of organic contaminants by earthworms, due to high bioavailability of the contaminants and/or weight loss of the worms in it. Further, the accumulation of selected PBDEs and HBB was compared to the accumulation of their chlorinated analogues. Brominated compounds accumulated to the same or a lesser extent than their chlorinated counterparts.
在本研究中，研究了几种选定的溴化阻燃剂（BFRs）在蚯蚓（赤子爱胜蚓）中的积累潜力。测试的 BFRs 包括多溴二苯醚（PBDEs）、六溴苯（HBB）和 1,2-二溴-4-（1,2-二溴乙基）环己烷（TBECH），它们被发现对赤子爱胜蚓是生物可利用的，并在蚯蚓中积累。据我们所知，这是首次发表的研究 TBECH 在陆地生物群中生物积累潜力的研究。土壤老化导致 TBECH、HBB 和溴原子数为 6 或更少的 PBDEs 的积累减少。然而，土壤老化对 BDEs 183 或 209 没有影响，这可能是由于它们在土壤中的迁移性较低。使用不同的土壤（人工 OECD 土壤和两种天然瑞典土壤）也会影响蚯蚓中的积累程度。结果表明，由于污染物的高生物可利用性和/或蚯蚓在其中的体重损失，使用普遍接受的标准 OECD 土壤可能会高估蚯蚓对有机污染物的积累。此外，还比较了选定的 PBDEs 和 HBB 的积累与它们的氯化类似物的积累。溴化化合物的积累程度与氯化类似物相同或更低。
