電子廃棄物の構成要素に含まれるPerおよびPolyfluoroalkyl物質の浸透性および化学プロファイル:標的と非標的の分析
Joshua O Ocheje1, Yelena Katsenovich2, Berrin Tansel3
1Institute of Environment, Department of Chemistry and Biochemistry, Florida International University, North Miami, FL 33181, USA.
Molecules (Basel, Switzerland)
|February 13, 2026
まとめ
電子廃棄物 (e-waste) には,環境に浸出するペルおよびポリフッ素アルキル物質 (PFAS) が含まれています. 携帯電話の画面とプラスチックでは,PFASの浸透性が最も高く,電子廃棄物の管理から重大なリスクが生じています.
科学分野:
- 環境化学 環境化学
- マテリアルサイエンス 材料科学
- 毒理学 毒理学 毒理学
背景:
- 電子廃棄物 (e-waste) は,急速に増加している廃棄物流です.
- 電子廃棄物は,ペルおよびポリフッ素アルキル物質 (PFAS) を含む,大部分未開示のフッ素化合物を含んでいます.
- 電子廃棄物の部品からのPFASの環境的運命と浸透性は十分に理解されていません.
研究 の 目的:
- 電子廃棄物の主要成分からPFASのリーチャビリティを定量化するために.
- これらのコンポーネント内のPFASの化学プロフィールを特徴付けるために.
- 電子廃棄物のPFASに関連する環境リスクを評価する.
主な方法:
- 電話画面,プラスチック,電容器,リチウムイオン電池に30日間の脱離水浸出試験を実施しました.
- PFASは,弱いアニオン交換 (WAX) カートリッジによる固体相抽出を用いて抽出されました.
- 分析は,液体染色学三四極質量スペクトロメトリーおよび非標的分析 (オービトラップアストラル) を用いて行われました.
主要な成果:
- 浸出性PFAS総量 (PFAS) は,携帯電話の画面 (1739-1932 ng·kg−1) とプラスチック (1575-2197 ng·kg−1) で最も高かった.
- リチウムイオン電池 (148-158 ng·kg−1) と電容器 (147-243 ng·kg−1) は,著しく低いPFASを示した.
- 携帯電話の画面/プラスチックには主に短鎖のパーフオロアルキル酸が含まれており,電容器/バッテリーには硫酸塩/炭酸塩の混合パターンが見られた.
結論:
- 携帯電話のスクリーンやプラスチックは,PFASの浸透性が高いため,より大きな質量ベースのリスクを表しています.
- 容量器や電池は,漏れやすさが低いにもかかわらず,微量に有害なPFASを含んでいます.
- PFAS の放出を軽減するために,PFAS のない代替品,添加物の開示,電子廃棄物の管理の改善が不可欠です.
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