船舶で発生する灰色水中のマイクロプラスチックの定量化とそのバルト海の汚染への貢献

J T Mujingni¹, E Ytreberg², I-M Hassellöv¹

¹Department of Mechanics and Maritime Sciences, Chalmers University of Technology, Gothenburg, Sweden.

Environmental pollution (Barking, Essex : 1987)

|February 13, 2026

まとめ

船から発生する灰色水は,バルト海におけるマイクロプラスチック (MP) の主要な源であり,洗濯物の廃水はMP濃度が最も高い. 効果的な緩和には,船上のシステム内のMPの源を防止する必要があります.

科学分野:

海洋汚染海洋汚染
環境化学環境化学
排水処理は,下水処理として行われます.

背景:

バルト海は,陸上および海上活動から生じる様々な汚染物質によって重く汚染されています.
船から発生する灰色水 (GW) は,海洋マイクロプラスチック (MP) 汚染の重要な,しかし十分に研究されていない源です.

研究の目的:

船舶で発生するグレーウォーターのマイクロプラスチック濃度と負荷を定量化するために.
バルト海の海洋マイクロプラスチック汚染に対する船舶GWの寄与を評価する.
マイクロプラスチックの除去に対する排水処理の有効性を評価する.

主な方法:

5つの船から8つの灰色水流のサンプリングと分析.
15種類のマイクロプラスチックのポリマーの識別と特徴付け.
バルト海の艦隊による年間マイクロプラスチックの負荷の推定.

主要な成果:

マイクロプラスチックの濃度は ~38,000 MP/m3 (宿泊施設-洗濯店-ガレー) から ~602,000 MP/m3 (洗濯店) のストリームまで幅広く変化しました.
ポリエチレンテレフタラート (PET) は,すべてのサンプルで見つかった支配的なポリマー (58%) でした.
RoPax船からの年間PM負荷の推定値は124億から759億個の粒子で,年間最大11兆PMが海に直接放出される可能性がある.

結論:

船から発生する灰色水は,特に旅客船からのバルト海へのマイクロプラスチックの大量で,十分に研究されていない源です.
先進的な処理により,ほとんどのMPを除去できるが,大量の排水量があるため,残留排出量は依然として大きい.
緩和戦略では,船上の洗濯機,ガレー,宿泊施設の供給源削減を優先しなければならない.

キーワード:

負荷は,荷重を積んでいる.微小汚染物質である.トリートメントトリートメント船舶は,船から船へ.廃水の排水は,下水によるものです.

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