Influence of carbon nanotubes with preloaded and coexisting dissolved organic matter on the bioaccumulation of polycyclic aromatic hydrocarbons to Chironomus plumosus larvae in sediment
Influence of carbon nanotubes with preloaded and coexisting dissolved organic matter on the bioaccumulation of polycyclic aromatic hydrocarbons to Chironomus plumosus larvae in sediment
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DOI：
10.1002/etc.2414
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发表时间：
2014-01
影响因子：
4.1
通讯作者：
Mohai Shen;X. Xia;Yawei Zhai;Xiaotian Zhang;Xiuli Zhao;Pu Zhang
中科院分区：
文献类型：
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作者：
Mohai Shen;X. Xia;Yawei Zhai;Xiaotian Zhang;Xiuli Zhao;Pu Zhang
水体中溶解性有机物（DOM）的普遍存在可能会影响沉积物中含碳物质对底栖生物富集多环芳烃（PAHs）的影响。选择1种多壁碳纳米管（MWNT）、2种DOM（富里酸和单宁酸）和2种多环芳烃（芘和金），研究了MWNT与预载DOM共存对沉积物中多环芳烃（PAHs）富集羽摇蚊（Chironomus plumosus）幼虫的影响。此外，还测定了多环芳烃的自由溶解浓度，探讨了其影响机理。结果表明，无论有无DOM预加载或共存，沉积物中1%多壁碳纳米管的存在均抑制了多环芳烃的生物-沉积物累积因子（BSAF），并提高了多环芳烃的水体生物累积因子（BAF）。而BSAF和BAF值随着两种形态DOM的增加而降低，这是由于DOM和MWNT共同影响了PAHs的自由溶解浓度和底栖生物的摄食行为所致。环境毒理化学2014;33：182-189。© 2013 SETAC
The ubiquity of dissolved organic matter (DOM) in an aqueous environment may have influence on the carbonaceous material's impact on the bioaccumulation of polycyclic aromatic hydrocarbons (PAHs) to benthonic organisms in contaminated sediment. In the present study, 1 multiwalled carbon nanotube (MWNT); 2 types of DOM (fulvic acid and tannic acid), and 2 PAHs (pyrene and chrysene) were selected to study the influence of MWNT with preloaded and coexisting DOM on the bioaccumulation of PAHs to Chironomus plumosus larvae in sediment. Moreover, the freely dissolved concentrations of PAHs were measured to explore the influence mechanisms. The results showed that despite the presence or absence of preloaded or coexisting DOM, the presence of 1% MWNT in sediments suppressed the biota‐sediment accumulation factor (BSAF) and elevated the water‐based bioaccumulation factor (BAF) of PAHs. However, the BSAF and BAF values generally decreased with the increase of 2 forms of both DOM; this was caused by the combined impact of DOM and MWNT on the freely dissolved concentrations of PAHs and the ingestion behavior of benthic organisms. Environ Toxicol Chem 2014;33:182–189. © 2013 SETAC