在实验室列中通过土壤氧化还原连续传感和微生物群特征表征来评估自然源区枯竭和增强源区枯竭
Maria Irianni-Renno1, Jorge L Rico1, Trent A Key2
1Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, CO 80523, USA.
Journal of hazardous materials
|July 25, 2024
概括
监测土壤的氧化还原和微生物活动,共同提高对自然和增强的源区枯竭的理解,以轻非水相液 (LNAPL) 整治. 这种综合方法为生物降解过程提供了更深入的见解.
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:
- 轻型非水相液体 (LNAPL) 的有效整治需要强大的监测策略.
- 地下氧化降解潜力 (ORP) 传感器为跟踪氧化还原演变和生物地球化学过程提供了潜在的潜力.
- 了解土壤氧化还原动力学,微生物活动和LNAPL降解之间的联系至关重要.
研究的目的:
- 结合土壤ORP传感与微生物组分析,研究自然源区枯竭 (NSZD) 和增强源区枯竭 (ESZD) 过程.
- 阐明LNAPL生物降解过程中土壤氧化还原动态和微生物群落之间的关系.
- 评估LNAPL影响土壤的生物刺激 (硫酸盐添加) 和生物效应.
主要方法:
- 使用土壤ORP传感器进行连续的氧化还原监测.
- 用DNA和RNA测序进行微生物组分析.
- 在石油炼油厂的LNAPL受影响的土壤上进行了柱状研究.
主要成果:
- 在连续的土壤氧化还原数据和活跃的微生物群落之间建立了相关性.
- 随着硫酸盐的添加,观察到的过渡性氧化还原增加,影响微生物组结构和乙烯降解.
- 生物并没有达到完全有氧的条件,这表明无氧代谢有助于生物降解.
结论:
- 结合连续的氧化还原传感与微生物组分析,提供了对NSZD和ESZD的协同见解.
- 这种综合方法提高了碳化合物生物降解数据的解释.
- 这些发现支持改善LNAPL修复场所的监测策略.
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