State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China.
Environ Int. 2011 Nov;37(8):1357-61. doi: 10.1016/j.envint.2011.06.005. Epub 2011 Jun 25.
Biota-sediment accumulation factors (BSAFs) for Dechlorane Plus (DP), a highly chlorinated flame retardant, were determined in three bottom fish species, i.e., crucian carp, mud carp, and northern snakehead from an electronic waste recycling site in South China. The average BSAFs are 0.007, 0.01, and 0.06 for syn-DP, and 0.003, 0.025, and 0.001 for anti-DP in crucian carp, mud carp, and northern snakehead, respectively, suggesting low bioaccumulation potential of DP isomers in these fish. However, the bioaccumulation factors (BAFs) determined previously in the same sample set indicated that both DP isomers were highly bioaccumulative (BAFs>5000) in most of the samples. This implies that BSAF values may be inherently inconsistent affecting their reliability as a bioaccumulation indicator. The BSAFs for DP isomers are two orders of magnitude lower than those (average of 0.43-2.28) for extremely hydrophobic polychlorinated biphenyls (CBs 199, 203, 207 and 208), but are comparable to those (average of 0.0001-0.009) for decabromodiphenyl ether (BDE 209) determined in the same sample set. Despite of the different chemical structures of the three compound classes, significantly negative correlations between logarithm of octanol-water partition coefficients (log K(OW)s) and BSAFs of these chemicals were found, indicating that hydrophobicity is one of the key factors influencing the bioaccumulation of these compounds.
在中国南方的一个电子废物回收场，从三种底层鱼类（鲫鱼、鲤鱼和北方蛇头鱼）中确定了高度氯化阻燃剂十氯联苯（DP）的生物沉积物积累因子（BSAF）。鲫鱼、鲤鱼和北方蛇头鱼中 syn-DP 的平均 BSAF 分别为 0.007、0.01 和 0.06，anti-DP 分别为 0.003、0.025 和 0.001，表明 DP 异构体在这些鱼类中具有较低的生物积累潜力。然而，在同一样本组中先前确定的生物积累因子（BAF）表明，两种 DP 异构体在大多数样本中均具有高度的生物积累性（BAF>5000）。这意味着 BSAF 值可能固有地不一致，影响其作为生物积累指标的可靠性。DP 异构体的 BSAF 值比那些极高疏水性多氯联苯（CBs 199、203、207 和 208）的 BSAF 值低两个数量级，但与同一样本组中测定的十溴二苯醚（BDE 209）的 BSAF 值（平均为 0.0001-0.009）相当。尽管这三类化合物的化学结构不同，但这些化合物的辛醇-水分配系数（log K(OW)s）和 BSAF 之间存在显著的负相关关系，表明疏水性是影响这些化合物生物积累的关键因素之一。
