Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China.
Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China.
Sci Total Environ. 2020 Oct 15;739:140084. doi: 10.1016/j.scitotenv.2020.140084. Epub 2020 Jun 9.
As emerging persistent organic pollutants in marine environment, short-chain chlorinated paraffins (SCCPs) have attracted increasing attentions recently. Coral reefs are important ocean ecosystems. However, data on SCCP pollution in the coral reef regions is still unavailable. In the present work, bioaccumulation of SCCPs in the coral reef ecosystems was reported for the first time. SCCP concentrations in coral reef fish from the Nansha Islands of the South China Sea were in the range of 37.9-25,400 ng/g lipid weight (lw) (average: 4400 ± 6590 ng/g lw; median: 1020 ng/g lw). C SCCPs were the dominating SCCP homologues, accounting for 59% to 80% of the total SCCPs (average: 70 ± 5.0%), followed by C SCCPs (average: 23 ± 4.5%). Regarding chlorine substitution, SCCPs were dominated by Cl SCCPs (average: 45 ± 2.5%) and Cl SCCPs (average: 30 ± 5.4%). Trophic magnification factor (TMF) of total SCCPs was 8.5, indicating trophic magnification potential of SCCPs in the coral reef ecosystems. In addition, a parabolic relationship was established between TMFs and log K of specific SCCP homologues. SCCP residues in the coral reef fish from the Nansha Islands of the South China Sea did not pose significant risk to human health.
作为新兴的持久性有机污染物，短链氯化石蜡（SCCPs）在海洋环境中受到越来越多的关注。珊瑚礁是重要的海洋生态系统。然而，关于珊瑚礁地区 SCCP 污染的数据仍然缺乏。在本研究中，首次报道了 SCCPs 在珊瑚礁生态系统中的生物累积情况。南海南沙群岛珊瑚礁鱼类中的 SCCP 浓度范围为 37.9-25400ng/g 脂重（lw）（平均值：4400±6590ng/g lw；中位数：1020ng/g lw）。C SCCPs 是主要的 SCCP 同系物，占总 SCCPs 的 59%至 80%（平均值：70±5.0%），其次是 C SCCPs（平均值：23±4.5%）。关于氯取代，SCCPs 主要由 Cl SCCPs（平均值：45±2.5%）和 Cl SCCPs（平均值：30±5.4%）组成。总 SCCPs 的营养放大因子（TMF）为 8.5，表明 SCCPs 在珊瑚礁生态系统中具有营养放大的潜力。此外，还建立了 TMFs 与特定 SCCP 同系物的 log K 值之间的抛物线关系。南海南沙群岛珊瑚礁鱼类中的 SCCP 残留量对人类健康没有造成显著风险。
