鉱山の排水処理のためのアナモックスコンソーシアムの低用量希土元素によるストレスを軽減するFe (II) による解毒

Yongxing Chen¹, Yu Zhang¹, Jiayi Li¹

¹School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China.

Journal of hazardous materials

|August 29, 2025

まとめ

部分脱窒化/アナモックスシステムに低量の鉄を添加することで,窒素を取り除く微生物を有毒な希土元素から保護します. 微生物の耐性や解毒経路を向上させることで鉱山の廃水の生物修復を促進します

科学分野:

環境科学
微生物学
バイオテクノロジー

背景:

稀土採掘は窒素汚染を生じさせる
排水中の希土元素は生物学的窒素除去を阻害する.
アナモックス菌は窒素除去に不可欠ですが,REEsに敏感です.

研究の目的:

REEsで汚染された廃水における低用量のFe (II) の保護効果を調査する.
REEsの毒性のFe (II) 媒介による緩和の背後にあるメカニズムを解明する.
稀土採掘の廃水の持続可能な生物修復のための洞察を提供すること.

主な方法:

15 mg/LのFe (II) との部分脱窒化/アナモックス (PD/A) バイオリアクターの比較
微生物の代謝変化を評価するメタゲノミクス分析
電子輸送と炭素固定経路の分析
生物合成の調節と微生物のストレス抵抗性の調査

主要な成果:

Fe ((II) 添加物は,アナモックスコンソーシアムに REE によるストレスを有意に軽減した.
メタゲノミクスは,ヒドラジン代謝の変化を含む代謝再構成を明らかにした.
Fe ((II) は,炭素固定のための電子の利用を強化し,ストレスレジリエンスメカニズムを刺激しました.
REEsの抑制値が上昇したのはFe (II) によるメディエーションで確認された.

結論:

低用量Fe ((II) は,PD/AシステムにおけるREEsの毒性に対する保護剤として作用する.
Fe ((II) は微生物の防御メカニズムを強化し,解毒と物理的な強化を含みます.
この研究は,稀土採掘地域の持続可能な生物修復のための新しい戦略を提供します.

キーワード:

アナモックス Fe ((II) について窒素除去稀土元素ストレス緩和

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