Water and Soil Quality Research Group, Dep. of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain.
Water and Soil Quality Research Group, Dep. of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain.
Sci Total Environ. 2016 Sep 15;565:299-305. doi: 10.1016/j.scitotenv.2016.04.155. Epub 2016 May 10.
To understand the behavior of some emerging flame retardants (FRs) in the environment, a nonexhaustive extraction using Tenax was applied to study their behavior in aquatic ecosystems. Desorption of 8 polybrominated diphenyl ethers (PBDEs), 8 methoxylated PBDEs, 3 emerging brominated FRs and 6 halogenated norbornenes from sediments spiked in the laboratory was studied. Results showed that emerging FRs have a similar bioavailability than that of legacy FRs, already banned. In addition, some parameters such as sediment total organic carbon (TOC), aging or nanomaterial (NMs) presence in the sediment were modified in order to study their effects on the bioavailability of FRs. Bioavailability increases with a diminution of sediment TOC, while diminishes with an increase of aging. The study of effect of NM presence was performed at three different pH (acidic, neutral and basic), and for the three scenarios, FR bioavailability decreased with NM presence. The retention of pollutants in the sediment seems to be favoured by NM presence, minimizing their impact on living organisms.
为了了解一些新兴阻燃剂 (FRs) 在环境中的行为，采用 Tenax 进行了非穷尽性萃取，以研究它们在水生生态系统中的行为。研究了实验室中添加的 8 种多溴二苯醚 (PBDEs)、8 种甲氧基化 PBDEs、3 种新兴溴化 FRs 和 6 种卤化降冰片烯从沉积物中的解吸情况。结果表明，新兴 FRs 的生物可利用性与已被禁止的传统 FRs 相似。此外，还修改了一些参数，如沉积物总有机碳 (TOC)、老化或沉积物中纳米材料 (NMs) 的存在，以研究它们对 FRs 生物可利用性的影响。生物可利用性随沉积物 TOC 的减少而增加，随老化的增加而减少。在三种不同的 pH 值（酸性、中性和碱性）下进行了 NM 存在的影响研究，在三种情况下，FR 的生物可利用性随 NM 的存在而降低。污染物在沉积物中的滞留似乎受到 NM 存在的促进，从而最大限度地减少它们对生物体的影响。
