Naito Wataru, Jin Jiancheng, Kang Youn-Seok, Yamamuro Masumi, Masunaga Shigeki, Nakanishi Junko
Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.
Chemosphere. 2003 Oct;53(4):347-62. doi: 10.1016/S0045-6535(03)00046-8.
Concentrations and accumulation profiles of PCDDs/DFs and coplanar-PCBs (co-PCBs) in aquatic biota (e.g., plankton, shellfish, benthic invertebrate, and fish) and sediment from Tokyo Bay were examined to elucidate the relationship between bioaccumulation and trophic level in the food web as determined by the stable nitrogen isotope analysis. Bioaccumulation patterns of PCDDs/DFs and co-PCBs varied greatly among congeners. Accumulation patterns of PCDDs/DFs and co-PCBs are not solely explained by their physicochemical properties. Biota-sediment accumulation factors (BSAFs) for co-PCBs in biota from Tokyo Bay were significantly greater than those of PCDDs/DFs. Furthermore, the slopes of the plots of delta15N and BSAF values and water solubility of 2,3,7,8-substituted PCDDs/DFs and co-PCBs were highly correlated. The results of our study would provide the valuable information to understand the accumulation properties of PCDDs/DFs and co-PCBs that can be used as a scientific basis to determine the sediment quality criteria of PCDDs/DFs and co-PCBs.
研究了东京湾水生生物（如浮游生物、贝类、底栖无脊椎动物和鱼类）以及沉积物中多氯二苯并对二恶英/多氯二苯并呋喃（PCDDs/DFs）和共平面多氯联苯（co-PCBs）的浓度及积累情况，以阐明通过稳定氮同位素分析确定的食物网中生物积累与营养级之间的关系。PCDDs/DFs和co-PCBs的生物积累模式在不同同系物之间差异很大。PCDDs/DFs和co-PCBs的积累模式不能仅由其物理化学性质来解释。东京湾生物群中co-PCBs的生物群-沉积物积累因子（BSAFs）显著高于PCDDs/DFs。此外，δ15N与BSAF值的关系图斜率以及2,3,7,8-取代PCDDs/DFs和co-PCBs的水溶性高度相关。我们的研究结果将为了解PCDDs/DFs和co-PCBs的积累特性提供有价值的信息，可作为确定PCDDs/DFs和co-PCBs沉积物质量标准的科学依据。
