ヨーロッパにおける粒子の空気汚染源とその酸化可能性
Kaspar R Daellenbach1,2,3, Gaëlle Uzu4, Jianhui Jiang5
1Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen, Switzerland.
Nature
|November 19, 2020
まとめ
大気汚染の健康への影響の重要な要因である酸化力を減らすことはできません. バイオマスの燃焼や車両の排出などの特定の源をターゲットにすることは,空気質と公衆衛生の改善に不可欠です.
科学分野:
- 環境科学
- 公衆衛生
- 大気化学
背景:
- 大気汚染の微粒子は 世界中で何百万もの命を奪っています
- PMの健康への影響は質量濃度によって評価されますが,粒子の大きさ,組成,酸化能力も重要です.
- PMの酸化能力と健康への急性影響との関連は不確かで,その源について矛盾する結果が出ています.
研究 の 目的:
- ヨーロッパにおける主要な一次および二次的なPM質量および酸化可能性を定量化する.
- PM源と酸化力の関係を調べる
- 大気汚染による健康への影響を ターゲットに絞った緩和戦略を策定する.
主な方法:
- ヨーロッパ全域のフィールド観測を利用した.
- 空気の質をモデル化する技術
- PMの質量と酸化可能性に対する様々な源の量化貢献.
主要な成果:
- 二次的な無機成分,地殻物質,二次的な生物学的エアロゾールは,PMの質量濃度を駆動します.
- 酸化潜在的な濃度は主に人為的な源に関連しています.
- オキシダティブ・ポテンシャルに大きく寄与するものは,住宅用バイオマス燃焼からの二次有機エアロゾールと,車両の排気以外の金属である.
結論:
- 総粒子の質量削減にのみ焦点を当てた緩和戦略は,酸化可能性を効果的に低下させない可能性があります.
- 住宅用バイオマスの燃焼や車両からの排出などの特定のPM源をターゲットにすることで,酸化可能性に関連する健康リスクを減らすことがより効果的です.
- 特定の健康への影響と酸化可能性を結びつけるさらなる研究は,公衆衛生戦略を精進するために正当化されています.
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