列中零铁的增强生物硫化:促进透反应屏障中脱的影响
Binbin Wang1, Qin Luo1, Yujia Pan1
1College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China.
Environmental science & technology
|November 27, 2023
概括
零价值铁 (ZVI) 通过刺激低硫酸盐细菌 (SRB) 活动和促进生物硫化,增强脱. 了解这些相互作用对于使用ZVI透反应屏障进行持续的现场整治至关重要.
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:
- 使用硫酸盐减少细菌 (SRB) 的生物硫化提供了与化学方法相比的增强脱率.
- 控制和维持在现场脱过程中的生物硫化仍然不太清楚.
研究的目的:
- 在增强的生物硫化条件下,研究SRB和零价值铁 (ZVI) 之间的详细相互作用.
- 为了描述SRB的扩散和ZVI表面性质随着时间的推移而发生的变化.
主要方法:
- 柱体实验是在4个月内进行的.
- 监测了SRB活动,ZVI表面特性和溶解的有机碳.
- 使用批量测试来评估降解率和电子效率.
主要成果:
- 通过消耗多余的硫化物和降低氧化还原潜力,ZVI刺激了SRB活动.
- 通过静电排斥,ZVI阻碍了SRB迁移,将它们集中在升级器上.
- 高溶解有机碳 (>2.2 mM) 对于强烈的生物硫化非常重要.
- SRB的存在促进了铁聚硫化物的形成,使表面硫含量增加了三倍.
- 这导致三乙烯降解和电子效率分别提高了三倍和两倍.
结论:
- SRB和ZVI的相互作用对于持续的生物硫化非常重要.
- 了解这些动态可以优化ZVI透反应屏障,以增强现场脱.
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