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首页> 外文期刊>Environmental toxicology and chemistry >BIOAVAILABILITY OF DECABROMODIPHENYL ETHER TO THE MARINE POLYCHAETE NEREIS VIRENS
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BIOAVAILABILITY OF DECABROMODIPHENYL ETHER TO THE MARINE POLYCHAETE NEREIS VIRENS

机译：十溴二苯醚对海洋多发性神经病病毒的生物利用度

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摘要

The flame retardant decabromodiphenyl ether (BDE 209) accumulates in humans and terrestrial food webs, but few studies have reported the accumulation of BDE 209 in aquatic biota. To investigate the mechanisms controlling the bioavailability of BDE 209, a 28-d bioaccumulation experiment was conducted in which the marine polychaete worm Nereis virens was exposed to a decabromodiphenyl ether (deca-BDE) commercial mixture (>85% BDE 209) in spiked sediments, in spiked food, or in field sediments. Bioaccumulation from spiked substrate with maximum bioavailability demonstrated that BDE 209 accumulates in this species. Bioavailability depends on the exposure conditions, however, because BDE 209 in field sediments did not accumulate (<0.3 ng/g wet weight; 28-d biota-sediment accumulation factors [BSAFs] <0.001). When exposed to deca-BDE in spiked sediments also containing lower brominated congeners (a penta-BDE mixture), bioaccumulation of BDE 209 was 30 times lower than when exposed to deca-BDE alone. Selective accumulation of the lower brominated congeners supports their prevalence in higher trophic level species. The mechanisms responsible for limited accumulation of BDE 209 may involve characteristics of the sediment matrix and low transfer efficiency in the digestive fluid.
机译：阻燃剂十溴二苯醚（BDE 209）会在人和陆地食物网中积累，但是很少有研究报道BDE 209在水生生物中的积累。为了研究控制BDE 209生物利用度的机理，进行了28天的生物富集实验，其中将海洋多毛蠕虫Nereis virens暴露于加标沉积物中的十溴二苯醚（deca-BDE）商业混合物（> 85％BDE 209）中。 ，加标食品或田间沉积物中。具有最大生物利用度的加标底物的生物累积表明，BDE 209会在该物种中累积。但是，生物利用度取决于暴露条件，因为野外沉积物中的BDE 209没有积累（<0.3 ng / g湿重； 28天生物沉积物积累因子[BSAFs] <0.001）。当暴露于也包含较低溴化同系物（五溴联苯醚混合物）的加标沉积物中的十溴联苯醚时，BDE 209的生物蓄积比单独暴露于十溴联苯醚时低30倍。低溴同类物的选择性积累支持了它们在较高营养级别物种中的流行。造成BDE 209有限积累的机制可能涉及沉积物基质的特征和消化液中的低转移效率。

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  • 来源
    《Environmental toxicology and chemistry》 |2010年第4期|p.860-868|共9页
  • 作者

    Susan L. Klosterhaus; Joel E. Baker;

  • 作者单位

    University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, 1 Williams Street, Solomons, Maryland, 20688 USA;

    University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, 1 Williams Street, Solomons, Maryland, 20688 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    bioavailability; bioaccumulation; polybrominated diphenyl ethers; polychaete; sediment;

    机译：生物利用度生物蓄积多溴二苯醚;多毛绒沉淀;

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