Role of ingestion route in the perfluoroalkyl substance bioaccumulation by Chironomus plumosus larvae in sediments amended with carbonaceous materials.
Role of ingestion route in the perfluoroalkyl substance bioaccumulation by Chironomus plumosus larvae in sediments amended with carbonaceous materials.
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DOI：
10.1016/j.jhazmat.2015.10.008
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发表时间：
2016-01
影响因子：
13.6
通讯作者：
Yawei Zhai;X. Xia;Xiuli Zhao;Haiyang Dong;B. Zhu;N. Xia;Jianwei Dong
中科院分区：
文献类型：
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作者：
Yawei Zhai;X. Xia;Xiuli Zhao;Haiyang Dong;B. Zhu;N. Xia;Jianwei Dong
研究了4种含碳物质（CMs）对羽摇蚊（Chironomus plumosus）幼虫富集6种全氟烷基化合物（PFASs）的影响。结果表明，在质量比为0.2- 2%的CM存在下，PFASs的体内负荷降低，与摄入无关。摄食暴露的幼虫积累的PFASs高于那些没有摄食，和摄入途径的作用改变在CMs的存在。在不添加CM的情况下，PFAS的摄入途径对PFAS生物累积的贡献率为2.7-31.6%，在添加质量分数为0.2- 2%的富勒烯时，PFAS的摄入途径对PFAS生物累积的贡献率增加到61.4%以上。CM引起的摄食途径贡献的增强是由于CM可以在幼虫体内被摄入，并且CM相关的PFAS可以部分解吸。全氟辛酸在幼虫消化液中的最大解吸率为20.8%。本研究表明，CM相关的PFASs可以部分地被生物体积累，并且在某些情况下，CMs的存在可能会增加PFASs的生态风险。在PFAS和其他疏水性有机化合物污染修复中应用CM时应考虑这一点。
The role of ingestion route in the bioaccumulation of six types of perfluoroalkyl substances (PFASs) byChironomus plumosuslarvae in sediments amended with four types of carbonaceous materials (CMs) was studied. The results showed that the body burden of PFASs decreased in the presence of CMs at mass ratios of 0.2–2%, regardless of ingestion. PFASs accumulated by the larvae with ingestion exposure were higher than those without ingestion, and the role of ingestion route was altered in the presence of CMs. The contribution of ingestion route to PFAS bioaccumulation was 2.7–31.6% without CMs, and it increased to more than 61.4% in the presence of fullerene at mass ratios of 0.2–2%. The enhancement of the ingestion route contribution caused by CMs is due to the fact that the CMs can be ingested and CM-associated PFASs can be partly desorbed in larvae. The maximum desorption efficiency of perfluorooctanoic acid was 20.8% from fullerene by the larval digestive juice. This study suggests that CM-associated PFASs could be accumulated partly by organisms, and the ecological risk of PFASs might increase in some cases with the presence of CMs. This should be considered when applying CMs in PFAS and other hydrophobic organic compound pollution remediation.