的还原性溶解与Sb调动相结合,在受污染的射击场土壤中被调动
Lara Costa1,2, Mathieu Martinez3, Marcel Suleiman3
1Institute for Ecopreneurship, School of Life Science, University of Applied Sciences and Arts Northwestern Switzerland (FHNW), Hofackerstrasse 30, 4132, Muttenz, Switzerland. laracardcosta@gmail.com.
Applied microbiology and biotechnology
|April 10, 2024
概括
在土壤生物反应器中模拟的还原条件显示,的还原驱动反的释放. 氧化-状态生物反应器有效量化污染土壤中的微量元素调动机制.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 微生物学 微生物学
背景情况:
- 土壤中的反 (Sb) 污染对环境构成风险.
- 了解Sb动员机制对于整治策略至关重要.
- 众所周知, (Mn) 氧化可以影响微量元素的命运.
研究的目的:
- 调查适度减少条件对Sb,Mn和Fe调动和物种化的影响.
- 为了比较 Sb 调动在氧化还原状态生物反应器 (R_MnR) 和控制生物反应器 (R_CTRL).
- 确定影响Sb释放的关键微生物参与者和地化学因素.
主要方法:
- 使用"redox-stat"生物反应器来模拟受控的中度降低条件 (+420 mV).
- 用一个控制生物反应器比较了元素动员 (Mn,Sb,Fe) 和物种化 (Sb (III) /Sb (V),Fe2+/Fe3+).
- 采用多重线性回归分析和细菌群体组成分析.
主要成果:
- 减少条件增加了废水Sb (V) 和Mn (II),表明Sb释放与Mn氧化氧化物减少有关.
- 在R_MnR中,Mn度与Sb废水度显著相关.
- 在R_MnR (10.40%) 和R_CTRL (10.37%) 中,类似的总体Sb释放表明无氧过程 (如Fe-reductive dissolution) 的附属作用.
结论:
- 微生物降解Mn氧化氧化的溶解是Sb在中度降解土壤条件下的动员的主要机制.
- 氧态生物反应器是量化特定微量元素调动机制的有效工具.
- 污染的土壤即使在老化后也保留了显著的Sb动员潜力,突出显示了持续的环境影响.
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