2,3,7,8-Tetrachlorodibenzo-p-dioxinの第2の源は,NJのLower Passaic Riverの堆積物から得たものです
Michael J Bock1, Lauren Brown1, Jennifer Jones1
1Verdantas, Yarmouth, ME, 04096.
Environmental toxicology and chemistry
|February 13, 2026
まとめ
下パサイク川における2,3,7,8-テトラクロロディベンゾ-p-ダイオキシン (2,3,7,8-TCDD) の第2の主要な源は,元ギバウダン施設として特定されました. 廃棄水排出量と化学製品生産データでは,ギバウダンによる排出が確認されています.
科学分野:
- 環境化学 環境化学
- 環境科学 環境科学
- 化学工学化学工学とは
背景:
- Lower Passaic River (LPR) は2,3,7,8-テトラクロロディベンゾ-p-ダイオキシン (2,3,7,8-TCDD) で汚染されていることが知られている.
- 以前の研究では,主要因が示唆されていたが,次要因の証拠が浮上していた.
- すべての主要な原因を特定することは,効果的な修復戦略を策定する上で極めて重要です.
研究 の 目的:
- LPRへの2,3,7,8-TCDDの第2の主要供給源として,元ギバウダン施設の可能性を調査する.
- 沈殿物の化学,歴史的化学生産データ,水力動力学的モデリングを統合して,汚染源を正確に特定する.
- LPRにおける全体的な2,3,7,8-TCDD負担に対するGivaudanファシリティの貢献度を定量化する.
主な方法:
- 2,3,7,8-TCDDとDDT+DDEのための高解像度日付付の沈殿芯の分析.
- GivaudanとDiamond Alkaliからの歴史的な化学生産データの統合.
- 輸送経路を評価するために,河川の流れモデルと廃水のバイパスイベント記録を使用します.
- Givaudan施設から排出された2,3,7,8-TCDDの質量の推定.
主要な成果:
- 異常なDDT+DDEと2,3,7,8-TCDDの比率がGivaudan施設 (河川マイル 12-12.5) の近くで観察されました.
- 1950年代後半から1960年代初頭の堆積物データは,23,7,8-TCDDの増加を示し,Givaudanでの2,4,5-TCP使用と一致しました.
- 水力学モデルとバイパス記録は,川のマイル11.5.5で重要なギバウダン排水量を示した.
- Givaudanからの推定2,3,7,8-TCDD排出量は,Diamond Alkaliからの排出量と同等であった.
結論:
- 元ギバウダン工場は,下パサイク川への2,3,7,8-TCDDの第2の主要源として特定されています.
- Givaudanの過去の業務と排水は,LPRのダイオキシン汚染に大きく貢献しました.
- これらの発見は,LPRの汚染の全範囲を理解し,将来の浄化作業に情報を提供するために非常に重要です.
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