Persistent Organic Pollutant Group, Environmental Department. CIEMAT, Madrid, Spain.
Environ Sci Technol. 2012 Nov 20;46(22):12364-72. doi: 10.1021/es302934p. Epub 2012 Oct 12.
Concentrations of Dechlorane (Dec) 603 (0.75 ng/g lipid weight (lw); mean) and Dec 602 (0.38 ng/g lw; mean) were quantified in more than 95% of the franciscana (Pontoporia blainvillei) dolphin samples, whereas the frequency of detection decreased to 75% for Dechlorane Plus (DP) (1.53 ng/g lw, mean). The presence of Chlordene Plus (CP) was also observed (0.13 ng/g lw, mean) in half of the samples. On the contrary, Dec 604, decachloropentacyclooctadecadiene (aCl(10)DP), and undecachloropentacyclooctadecadiene (aCl(11)DP) concentrations were below the limit of quantifications in all cases. To the best of our knowledge, this is the first article reporting the presence of Dec 603, Dec 602, and CP in mammals. For comparative purposes, levels of Mirex, polybrominated diphenyl ethers (PBDEs), and decabromodiphenylethane (DBDPE) are also reported. Considering geographic distribution evaluation together with the strong positive correlations found between DP and PBDEs (r(s) = 0.63; p < 0.01), highly anthropogenic areas were identified as potential sources of these chemicals in this dolphin species. However, local sources for Dec 602, 603, Mirex, CP, and DBDPE were not found indicating that in this case historical use and/or atmospheric transport and deposition may play an important role in their fate.
弗朗西斯科氏海豚样本中超过 95%的样本中定量检测到了浓度为 0.75ng/g 脂质重量（lw）的十氯代六氢-对-二恶英（Dec）603 和浓度为 0.38ng/g lw 的 Dec 602，而检出频率下降到 75%的是 Dechlorane Plus（DP）（1.53ng/g lw，平均值）。在半数样本中也观察到了氯丹加（CP）的存在（0.13ng/g lw，平均值）。相反，在所有情况下，十氯代六氢-对-二恶英（aCl(10)DP）和十一氯代六氢-对-二恶英（aCl(11)DP）的浓度都低于定量检测限。据我们所知，这是第一篇报道在哺乳动物中存在 Dec 603、Dec 602 和 CP 的文章。为了比较目的，还报告了灭蚁灵、多溴二苯醚（PBDEs）和十溴二苯乙烷（DBDPE）的水平。考虑到地理分布评估以及 DP 和 PBDEs 之间发现的强正相关（r(s) = 0.63；p < 0.01），高度人为活动区域被确定为该海豚物种中这些化学物质的潜在来源。然而，没有发现 Dec 602、603、灭蚁灵、CP 和 DBDPE 的本地来源，这表明在这种情况下，历史使用和/或大气传输和沉积可能对它们的命运起着重要作用。
