Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, Liaoning, China.
Environ Sci Technol. 2014 May 20;48(10):5964-71. doi: 10.1021/es500940p. Epub 2014 May 5.
Short chain chlorinated paraffins (SCCPs) are under the evaluation for inclusion into the Stockholm Convention on persistent organic pollutants. However, information on their bioconcentration and biomagnification in marine ecosystems is unavailable, limiting the evaluation of their ecological risks. In this study, seawater, sediment, zooplankton, invertebrates, and fishes collected from Liaodong Bay, Bohai Sea, North China were analyzed to investigate the residual level, congener group profile, bioaccumulation, and trophic transfer of SCCPs in a marine food web. The total concentrations of SCCPs ranged from 4.1 to 13.1 ng L(-1) in seawater, 65 to 541 ng g(-1) (dw) in sediment, and 86 to 4400 ng g(-1) (ww) in organisms. Correspondence analysis indicated the relative enrichment of C10Cl5 and C11Cl5 formula groups in most aquatic organisms. Both the logarithm bioaccumulation factors (log BAFs: 4.1-6.7) and biota-sediment accumulation factors (BSAFs: 0.1-7.3) of individual congeners implied the bioaccumulation of SCCPs. The trophic magnification factor (TMF) of ∑SCCPs was determined to be 2.38 in the zooplankton-shrimp-fish food web, indicating biomagnification potential of SCCPs in the marine ecosystem. The TMF values of individual congener groups significantly correlated with their log KOW values.
短链氯化石蜡（SCCPs）正在进行评估，以确定是否将其列入《关于持久性有机污染物的斯德哥尔摩公约》。然而，有关其在海洋生态系统中的生物浓缩和生物放大的信息尚不清楚，这限制了对其生态风险的评估。本研究采集了来自中国渤海辽东湾的海水、沉积物、浮游动物、无脊椎动物和鱼类，以调查 SCCPs 在海洋食物网中的残留水平、同系物组成、生物积累和营养转移。海水中 SCCPs 的总浓度范围为 4.1-13.1ng/L，沉积物中为 65-541ng/g（干重），生物体内为 86-4400ng/g（湿重）。对应分析表明，大多数水生生物中 C10Cl5 和 C11Cl5 同系物组相对富集。个别同系物的对数生物积累因子（log BAFs：4.1-6.7）和生物群-沉积物积累因子（BSAFs：0.1-7.3）均表明 SCCPs 具有生物积累性。在浮游动物-虾-鱼食物网中，∑SCCPs 的营养放大倍数（TMF）确定为 2.38，表明 SCCPs 在海洋生态系统中具有生物放大潜力。个别同系物组的 TMF 值与它们的 log KOW 值显著相关。
