持続性有機汚染物質の食物網特有の生物増幅
Barry C Kelly1, Michael G Ikonomou, Joel D Blair
1School of Resource and Environmental Management, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6, Canada.
まとめ
脂肪溶解度が適度でオクタノール-空気分離係数が高い特定の化学物質は,空気呼吸動物に蓄積し,リスクをもたらす可能性があります. これらの物質は,生態系と人間の健康への害を防ぐために,規制による評価を必要とします.
科学分野:
- 環境科学 環境科学
- 毒理学 毒理学 毒理学
- 生態毒理学 エコトキシコロジ
背景:
- 生物蓄積物質は,環境と人間の健康にリスクをもたらす.
- 規制機関は,バイオ蓄積物質を,高オクタノール-水分割係数 (K(OW) ≥100,000によって定義する.
研究 の 目的:
- これまでに認識されていなかった生物蓄積性物質の分類を特定する.
- 適度な水性および高オクタノール-空気分割係数 (K(OA)) を有する化学物質の生物増幅の可能性を調査する.
主な方法:
- 化学特性,特にオクタノール-水 (K(OW)) とオクタノール-空気 (K(OA)) 分割係数の分析.
- 空気呼吸生物を含む食物網における生物増幅の評価.
主要な成果:
- 100~10万のK ((OW)) を有する代謝能力の低い物質は,空気呼吸動物において,著しく生物増幅することができる.
- このバイオマグニフィケーションは,高いK (((OA)) と低呼吸道排泄率のために起こります.
- 商用有機化学物質の3分の1を占めるこれらの化学物質は,これまで生物蓄積性として特定されていなかった.
結論:
- 潜在的に生物蓄積性の高い物質 (低K ((OW) -高K ((OA)) の新しいクラスが特定されました.
- これらの物質は,生態系と人間の健康にリスクをもたらす.
- これらの化学物質の有害な影響を防ぐために,規制による評価が必要である.
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