对生物增强现场LNAPL溶液的综合评估
Eric A Seagren1, David J Hollander2, David A Stahl1
1Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA.
Journal of contaminant hydrology
|May 1, 2024
概括
在现场评估轻型非水相液体 (LNAPL) 的生物修复具有挑战性. 这项研究开发了一种综合策略,以证明生物增强的LNAPL溶解,显示由于生物降解而增加两倍.
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:
- 在现场生物修复的现场评估受到异质性,采样成本和测量限制的阻碍.
- 评估轻非水相液体 (LNAPL) 生物修复的有效性需要强大的评估策略.
- 了解微生物活动和污染物降解对于有效的现场生物修复至关重要.
研究的目的:
- 开发和展示一个合理的策略来评估LNAPL的现场生物修复.
- 使用综合分析方法量化生物增强的LNAPL溶解.
- 在受控的中等规模流细胞 (ISFC) 实验中模拟和评估本质的现场生物修复.
主要方法:
- 使用中等规模的流细胞 (ISFC) 实验模拟LNAPL (多中的纳夫他林) 污染的含水层.
- 综合多种分析:污染物损失,电子受体消耗,性,pH,溶解无机碳,稳定同位素,微生物计数和代谢物分析.
- 采用质量流模型和质量平衡分析来解释数据并评估生物修复性能.
主要成果:
- 与对照组相比,在生物修复场景中显示出在现场内甲生物降解的显著加速.
- 由于内在生物修复,量化生物增强的LNAPL溶解大约是2的因子.
- 展示了综合战略在提供生物增强的一致证据方面的有效性.
结论:
- 开发的综合战略有效地评估了现场生物修复性能,并量化了生物增强.
- 内在的生物修复显著加快了LNAPL的溶解,特别是在池/水界面.
- 这种方法提供了一种可靠的方法来评估受污染的含水层中的生物修复策略的成功.
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