汚染された環境から分離された原産のDesmodesmus株のニッケル除去性能とプロセスの特徴
Micaela B Gómez Jousse1, Carolina Bagnato1, Gisela Ferraro1
1Departamento de Eficiencia Energética y Biotecnología Ambiental, Centro Atómico Bariloche, Comisión Nacional de Energía Atómica (CNEA), Av. E. Bustillo 9500, CP 8400, S.C. de Bariloche, Río Negro, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
Journal of environmental management
|September 1, 2025
まとめ
2 デスモデスムス・スペイ 藻類の菌株は,生物吸収と降水によってニッケル (Ni) を効果的に除去します. 最適な条件は,pH7と0.3g/Lのバイオマス,そして効率的なバイオメディケーションのための15時間の接触時間です.
科学分野:
- 環境科学
- バイオテクノロジー
- 微生物学
背景:
- 金属の汚染は,毒性と持続性のために重要な生態学的リスクをもたらします.
- 環境汚染を軽減するには,効率的で持続可能な修復戦略が不可欠です.
- 単細胞藻は 汚染された水から 溶けた金属を取り除くのに 有望です
研究 の 目的:
- 2種類の原産のDesmodesmus spのニッケル (Ni ((II)) 除去能力を評価する. ストレスを感じます
- これらの藻類株によるNi ((II) 除去のための最適な条件を決定する.
- Desmodesmus sp.によるNi (III) 除去のメカニズムを解明する.
主な方法:
- デスモデスムス sp の培養 鉱物媒介でNi (II) に曝露している.
- 試験変数:初期pH,接触時間,バイオマス濃度,光,バイオマス活力
- フーリエ変換赤外線 (FT-IR) スペクトロスコーピー,スキャニング電子顕微鏡-エネルギー分散型X線スペクトロスコーピー (SEM-EDS),伝送電子顕微鏡 (STEM) を用いた分析.
主要な成果:
- 最大のNi (III) 除去 (>150 mg/g) はpH~6.5~7で,最適な条件はpH7で,0.3g/Lのバイオマスで,接触時間は15時間であった.
- 藻類の活動により,中間のpHが上昇し,ニッケル沈殿が促進された.
- FT- IR,SEM- EDS,STEM分析では,Ni (II) が細胞壁の機能群と表面堆積に結合し,細胞内吸収は観察されなかった.
結論:
- 吸附と降水は,Desmodesmus spによってNi (III) の除去の主なメカニズムである.
- この研究では2つの新しいDesmodesmus spを特定しました. ニッケルにとって重要なバイオリメディエーション・ポテンシャルを持つ菌株
- 発見は藻類ベースの金属除去戦略と環境浄化のメカニズムの洞察を提供します.
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