新しいリボフラビン媒介のナノスケールゼロバレント鉄/ペラセチ酸システムにおけるノルフロクサシン除去に関するメカニズム的な洞察: シンジェスティックな根幹と非根幹経路
Lin Wang1, Nuo Peng2, Yuqian Lin2
1State Key Laboratory of Water Pollution Control and Green Resource Recycling, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
Journal of hazardous materials
|September 3, 2025
まとめ
新しいリボフラビン媒介のナノスケールゼロバレント鉄/ペラセチン酸 (RF/nZVI/PAA) システムはノルフロッキサシンを効率的に除去します. この高度な酸化プロセスは重要な活性酸素種を生成し,副産物の完全な分解と毒性の低下につながります.
科学分野:
- 環境化学
- 高度酸化プロセス
- 水処理技術
背景:
- ノルフロクサシンは新興汚染物質で 水生生態系と人間の健康に 危険性があります
- 通常の水処理方法では,ノルフロクサシンを完全に除去するには不十分です.
- 高度酸化プロセス (AOP) は,持続性有機汚染物質を分解する有望な方法を示しています.
研究 の 目的:
- ノルフロキサシン除去を強化するための,ナノスケールでリボフラビン介鉄/ペラセチン酸 (RF/nZVI/PAA) システムを開発し,研究する.
- 分解メカニズムを解明し,関連する活性酸化物種 (ROS) を特定する.
- 変換製品を評価し,システムの効率性と再利用性を評価する.
主な方法:
- RF/nZVI/PAA AOPシステムの構築と最適化
- ROSを特定するために,電子パラマグネティック共振 (EPR) スペクトロスコーピーと消火実験を使用した.
- 高性能液体染色法 (HPLC) で分解経路を分析し,液体染色法-質量測定法 (LC-MS) で変換産物 (TP) を特定した.
- 電気化学的特徴,密度関数理論 (DFT) の計算,および毒性の評価を行った.
主要な成果:
- ノルフロクサシンの完全な除去 (100%) は,最適な条件下 (PAA=10 mg/ L,nZVI=20 mg/ L,RF=1 mg/ L,pH=4) で,70%の鉱化率で,30分以内に達成されました.
- ヒドロキシル基 (42%) と炭素中心の基 (44%) が主要なROSとして特定され,シングレット酸素は10%を寄与した.
- nZVIは高い再利用性を示した (7回のサイクルで86%の除去).
結論:
- RF/ nZVI/ PAAシステムは,リボフラビンの電子移転能力によって媒介されるROS生成によって駆動された,ノルフロクサシン分解のための非常に効率的なAOPです.
- 劣化はピペラジンの裂解,酸化,脱フッ素化,キノリン群の酸化を経て進行し,特定されたTPは毒性が低い.
- この研究は,新生汚染物質を廃棄水から除去するための有望で再利用可能な技術を示しています.
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