International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), Dalian Maritime University, Dalian, PR China.
Environ Sci Technol. 2011 Apr 1;45(7):2613-8. doi: 10.1021/es103723h. Epub 2011 Feb 25.
Dechloranes, including Dechlorane Plus (DP), Mirex (Dechlorane), Dechlorane 602 (Dec 602), Dechlorane 603 (Dec 603), and Dechlorane 604 (Dec 604), were determined using GC-MSD for water, sediment and oyster samples collected at 15 sampling sites near the Bohai and Huanghai Sea shore area of northern China in 2008. DP and Mirex were detected in most water, sediment, and oyster samples, which indicated widespread distribution of these two compounds. The mean concentrations in water, sediment and oyster samples, respectively, were 1.8 ng/L, 2.9 ng/g dry weight (dw) and 4.1 ng/g wet weight (ww) for total DP, and 0.29 ng/L, 0.90 ng/g dw, and 2.0 ng/g ww for Mirex. Dec 602 and Dec 603 were not detected in water but in small portions of the sediment and oyster samples, showing a low level of contamination by these two chemicals in the region. Strong and significant correlations were found between total DP and Mirex concentrations in water, sediment and oyster samples, probably suggesting similar local sources of these two chemicals. Dec 604 was not found in any samples. The biota-sediment accumulation factor (BSAF) of DP, Mirex, and Dec 602 declined along with the increase of their logarithm of octanol-water partition coefficients (log Kow), possibly indicating that compounds with lower log Kow (like Mirex and Dec 602) accumulated more readily in biota. The mean fractional abundance of syn-DP (fsyn) was 0.34 in water samples, a value lower than that in Chinese commercial mixture (0.41), while the mean fsyn for surface sediment (0.44) and oyster (0.45) samples were higher than technical values. Enrichment of syn-DP in oyster was in agreement with previously reported findings in Great Lakes fish. Enrichment of syn-DP in marine surface sediments, however, is contrary to data reported for fresh water sediments. To our knowledge this is the first report of Dec 602, Dec 603, and Dec 604 in a marine environment and also the first report of Dechloranes in marine biota.
2008 年，在中国北部渤海和黄海沿岸地区的 15 个采样点采集了水样、沉积物和牡蛎样本，使用 GC-MSD 法测定了这些样本中的 Dechloranes，包括 Dechlorane Plus（DP）、Mirex（Dechlorane）、Dechlorane 602（Dec 602）、Dechlorane 603（Dec 603）和 Dechlorane 604（Dec 604）。在大多数水样、沉积物和牡蛎样本中都检测到了 DP 和 Mirex，这表明这两种化合物广泛分布。水样、沉积物和牡蛎样本中总 DP 的平均浓度分别为 1.8ng/L、2.9ng/g 干重（dw）和 4.1ng/g 湿重（ww），Mirex 的平均浓度分别为 0.29ng/L、0.90ng/g dw 和 2.0ng/g ww。Dec 602 和 Dec 603 未在水样中检出，但在部分沉积物和牡蛎样本中有检出，表明该地区这两种化学物质的污染程度较低。水样、沉积物和牡蛎样本中总 DP 和 Mirex 的浓度之间存在很强的显著相关性，这可能表明这两种化学物质具有相似的本地来源。在任何样本中都没有发现 Dec 604。DP、Mirex 和 Dec 602 的生物沉积物富集因子（BSAF）随着它们的辛醇-水分配系数（log Kow）对数的增加而降低，这可能表明 log Kow 较低的化合物（如 Mirex 和 Dec 602）更容易在生物体内积累。水样中 syn-DP 的平均分数丰度（fsyn）为 0.34，低于中国商业混合物中的值（0.41），而表层沉积物（0.44）和牡蛎（0.45）样品中的平均 fsyn 高于技术值。牡蛎中 syn-DP 的富集与大湖鱼类中的先前报道结果一致。然而，海洋表层沉积物中 syn-DP 的富集与淡水沉积物中的数据报告相反。据我们所知，这是首次在海洋环境中报道 Dec 602、Dec 603 和 Dec 604，也是首次在海洋生物中报道 Dechloranes。
