Bioconcentration and biomagnification of polybrominated diphenyl ethers (PBDEs) through lower-trophic-level coastal marine food web
Bioconcentration and biomagnification of polybrominated diphenyl ethers (PBDEs) through lower-trophic-level coastal marine food web
复制标题
DOI：
10.1016/j.marpolbul.2009.03.008
复制
发表时间：
2009-08-01
影响因子：
5.8
通讯作者：
Tsuchiya, Kotaro
中科院分区：
文献类型：
--
作者：
Mizukawa, Kaoruko;Takada, Hideshige;Tsuchiya, Kotaro
对日本东京湾内海域的贝类、蟹类、鱼类、海水和沉积物中20种多溴联苯醚（PBDE）和5种多氯联苯（PCB）进行了测定。为了确定生物体的营养水平，还测量了碳和氮稳定同位素比率（Δ C-13和Δ N-15）。多溴二苯醚和多氯联苯同系物的生物富集系数随着辛醇-水分配系数（K-ow）上升到log K-ow = 7而增加，高于此值则再次下降。多氯联苯和几种多溴二苯醚同系物（BDE 47、99、100、153和154）在营养阶梯上的生物放大作用已通过其浓度与N-15增量之间的正相关性得到证实。其他多溴二苯醚同系物显示出负相关或没有相关性，表明它们通过新陈代谢进行生物转化。PBDEs（Br = 2-6）和PCBs（Cl = 6-9）的疏水性越强，其生物迁移性越强。因此，多溴二苯醚的生物迁移性似乎低于多氯联苯。(C)2009爱思唯尔有限公司保留所有权利。
Bivalves, crabs, fishes, seawater, and sediment collected from the inner part of Tokyo Bay, Japan, were measured for 20 polybrominated diphenyl ether (PBDE) and 5 polychlorinated biphenyl (PCB) congeners. To determine the trophic levels of the organisms, carbon and nitrogen stable isotope ratios (delta C-13 and delta N-15) were also measured. Bioconcentration factors of PBDE and PCB congeners increased as the octanol-water partition coefficient (K-ow) rose to log K-ow = 7, above which they decreased again. Biomagnification of PCBs and several PBDE congeners (BDE47, 99, 100, 153 and 154) up the trophic ladder was confirmed by a positive correlation between their concentrations and delta N-15. Other PBDE congeners showed a negative or no correlation, suggesting their biotransformation through metabolism. The more hydrophobic congeners of both PBDEs (Br = 2-6) and PCBs (Cl = 6-9) were biomagnified more. It thus appears that PBDEs are less biomagnified than PCBs. (C) 2009 Elsevier Ltd. All rights reserved.