学校環境における空気中のマイクロプラスチックとプラスチックの添加物:識別,定量化,それに伴う吸入リスク
Ana Torres-Agullo1, Angeliki Karanasiou2, Isabella Charres3
1Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain; Department of Chemical Engineering and Analytical Chemistry, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain.
Environment international
|September 4, 2025
まとめ
室内の空気中の微小プラスチック (MP) は室外の微小プラスチック (MP) よりも多いので,吸入のリスクがあります. この研究は,子どもの健康を守るため,学校でのこれらの汚染物質の監視の必要性を強調しています.
科学分野:
- 環境科学
- 分析化学
- 公衆衛生
背景:
- 屋内と屋外の大気汚染は 人々の健康に悪影響を及ぼし,特に 発達中の子供に悪影響を及ぼします.
- マイクロプラスチック (MP) は,健康への影響がほとんど知られていない環境汚染物質です.
- 学校は,空気の汚染物質に 子供の曝露を評価するための重要な環境です.
研究 の 目的:
- ポルトガルの学校で空気中のマイクロプラスチック濃度と吸入リスクの評価
- 室内外の空気中の特定のポリマーと同時に発生する汚染物質を特定する.
- 子供の毎日のMP吸入用量を評価する.
主な方法:
- 冬と春に教室や屋外で PM10のサンプルを採取した.
- オービトラップ質量スペクトロメトリー (Pyr-GC-Orbitrap-MS) と結合した熱分解ガスクロマトグラフィを用いて空中のMPを分析した.
- 多変数曲線解像度 (ROIMCR) を用いて,同時に標的と非標的の分析を行う.
主要な成果:
- 6つのポリマーが特定された:ポリメチルメタクリlate,ナイロン-6,6,ポリプロピレン,ニトリルブタディエンゴム,ポリビニル塩化物,およびポリチレン.
- 室内のMP濃度 (21. 8 ± 16. 3 ng/ m3) は,屋外での濃度 (13. 4 ± 13. 6 ng/ m3) よりも著しく高かった.
- 子供のMP吸入量の平均は1. 57 ± 0. 93 ng kg bw−1 d−1でした.
- フタル酸塩,農薬,ニコチンなどの共生汚染物質が検出されました.
結論:
- 研究対象の学校の子どもたちは 絶えず空気中の微小プラスチックと 危険な添加物の複雑な混合物にさらされています
- 高い室内のMPレベルは,教育環境における室内の空気の質の重要性を強調しています.
- 子どもの健康を守るため,空気の質の評価に空気中のPMを含める必要があることを強調しています.
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