Bioaccumulation of Dioxins Through Aquatic Food Chain

二恶英通过水生食物链的生物累积

• 批准号: 11680527
• 负责人: MASUNAGA Shigeki
• 金额: $ 2.37万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11680527/
• 关键词: polychlorinated dibenzo-p-dioxin; polychlorinated dibenzofuran; coplanar PCB; Lake Shinji; Tokyo Bay; bioaccumulation; food chain; fish; ポリ塩化ジベンゾ-p-グイオキシン; 生態系; 水鳥

The contamination of levels of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/DFs) and coplanar polychlorinated biphenyls (co-PCBs) were determined in various aquatic organisms from Lake Shinji and Tokyo Bay. In addition, stable nitrogen isotope ratios, which can be used as a parameter for quantifying trophic levels in the aquatic food chain, were determined.In the aquatic food chain, consist of plankton, benthic organisms, shellfish, and fish, each congener of co-PCB increased with the increasing trophic position. In contract to this, total PCDD/DFs concentration decreased with the increasing trophic position, while in total PCDD/DF-TEQ (toxic equivalents) increased with the trophic position. These phenomena were explained by the different trophic accumulation potency of various dioxin-like congeners through the trophic level (expressed as slope of regression line between congener concentration in organisms and stable nitrogen isotope ratio for each congener). The trophic a … More ccumulation potency were determined to be in the following order : mono-ortho-PCBs > non-ortho-PCBs > 2,3,7,8-substituted PCDD/DF congeners > non-2,3,7,8-substituted congeners. In addition, in the case of 2,3,7,8-substituted PCDD/DFs, the potency decreased with the increase of octanol-water partition coefficient (Kow).Analysis based on the biota-sediment accumulation factor (BSAF) gave the similar result explained above. The BSAFs for 2,3,7,8-PCDD/DF congeners were almost same for planktons, however, those for shellfish and fish decreased with the increase of Kow of those congeners, indicating that 2,3,7,8-congeners with higher Kow values are not efficiently transferred to higher trophic level. This phenomenon was not observed in the case of co-PCBs. BSAFs for co-PCBs were high and indicated to be efficiently transferred to higher trophic levels.These results showed that combined monitoring of nitrogen isotope ratio and contamination will give a better-synthesized data for bioaccumulation of pollutant through the food chain. Less

测定了东京湾和真治湖的多种水生生物体内多氯二苯并对二恶英和二苯并呋喃（PCDD/DFs）和共面多氯联苯（co-PCBs）的污染水平。在由浮游生物、底栖生物、贝类和鱼类组成的水生食物链中，co-PCB各同系物的含量随着营养地位的提高而增加。与此相反，总的PCDD/DFs浓度随着营养位置的增加而降低，而总的PCDD/DF-TEQ（毒性当量）随着营养位置的增加而增加。这些现象的原因是，各种二恶英类同系物在不同营养水平上的营养积累能力不同（用生物体内同系物浓度与每种同系物的稳定氮同位素比率之间的回归线斜率表示）。营养a ...更多信息 结果表明，多氯联苯的累积效应大小顺序为：单邻位多氯联苯>非邻位多氯联苯> 2，3，7，8-取代的多氯二苯并对二恶英/多氯二苯并呋喃同系物>非2，3，7，8-取代的同系物。此外，对于2，3，7，8-取代的PCDD/DFs，随着辛醇-水分配系数（Kow）的增大，其生物活性降低，基于生物群-沉积物累积因子（BSAF）的分析也得到了类似的结果。2，3，7，8-PCDD/DF同系物的生物安全系数对浮游生物几乎没有影响，但对贝类和鱼类的生物安全系数随其Kow值的增加而降低，表明Kow值较高的2，3，7，8-同系物不能有效地转移到较高的营养级。在co-PCB的情况下没有观察到这种现象。这些结果表明，氮同位素比值和污染物的联合监测可以为污染物通过食物链的生物累积提供更好的综合数据。少

项目成果

Youn-Seok Kang: "Specific biomagnification of polychlorinated dibenzo-p-dioxins and dibenzofurans in Tufted Duck (Aythya fuligula) and Common Cormorant (Phalacrocorax carbo) from Lake Shinji"Chemosphere. (印刷中)(未定).

Youn-Seok Kang：“来自宍道湖的簇绒鸭 (Aythya fuligula) 和鸬鹚 (Phalacrocorax carbo) 中多氯二苯并-对-二恶英和二苯并呋喃的特异性生物放大作用”（正在出版）（待定）。

Naomasa Iseki, Shin-ichi Hayama, Shigeki Masunaga, Junko Nakanishi: "Resudu lavel of polychlorinated dibenzo-p-dioxins and dibenzofrans and coplanar PCBs in common cormorant."Journal of Environmental Chemistry. 10[4]. 817-831 (2000)

Naomasa Iseki、Shin-ichi Hayama、Shigeki Masunaga、Junko Nakanishi：“普通鸬鹚中多氯二苯并-对-二恶英和二苯并呋喃以及共面 PCB 的残留。”环境化学杂志。

康 允碩: "宍道湖における水鳥、魚類及び二枚貝類中のダイオキシン類の異性体組成について"横浜国立大学環境科学研究センター紀要. 26巻1号(印刷中). (2000)

康云硕：《关于宍道湖水鸟、鱼类和双壳类中二恶英的异构体组成》横滨国立大学环境科学研究中心通报第26卷第1期（出版中）。

Youn-Seok Kang, Toru Taniuchi, Shigeki Masunaga, Junko Nakanishi: "Temporal Trend of PCDDs/DFs and Dioxin-like PCBs in Preserved Fish Samples from 1953 to 1999"Organohalogen Compounds. 46. 318-321 (2000)

Youn-Seok Kang、Toru Taniuchi、Shigeki Masunaga、Junko Nakanishi：“1953 年至 1999 年腌制鱼样品中 PCDD/DF 和二恶英类 PCB 的时间趋势”有机卤素化合物。

Youn-Seok Kang: "Specific biomagnification of polychlorinated dibenzo-p-dioxins and dibenzofurans in Tufted Duck (Aythya fuligula) and Common Cormorant (Phalacrocorax carbo) form Lake Shinji"Chemosphere. (in press).

Youn-Seok Kang：“宍道湖的簇绒鸭 (Aythya fuligula) 和鸬鹚 (Phalacrocorax carbo) 中多氯二苯并-对-二恶英和二苯并呋喃的特定生物放大作用”化学圈。