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在硫酸盐降低条件下,通过浮潜电子在硫酸盐降低条件下调节TCE脱的热生成碳

Kaikai Zhang¹, Wei-Han Lin², Shanquan Wang³

¹School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China; School of Environment, Tsinghua University, Beijing 100084, China.

Journal of hazardous materials

|September 22, 2024

概括

热性碳通过促进电子转移,增强了三乙烯 (TCE) 的微生物脱. 这种新的方法,使用没有有机化物呼吸细菌 (OHRB) 的电活性微生物,为受污染的地点提供有效的补救措施.

科学领域:

环境微生物学环境微生物学
生物修复是一种生物修复.
环境化学环境化学

背景情况:

使用有机氧化物呼吸细菌 (OHRB) 进行微生物脱,对于修复氧化碳污染场所至关重要.
限制包括OHRB的稀缺性和低效的H2介导的物种间电子转移,这些电子竞争对手,如Fe (III),硫酸盐和酸盐,进一步阻碍了这种转移.
现有的方法面临效率方面的挑战,容易受到环境干扰.

研究的目的:

引入 pyrogenic 碳作为电子穿器,以增强微生物脱过程.
为了研究火性碳和电活性微生物在修复三乙烯 (TCE) 的协同效应.
展示一个独立于OHRB的新生物修复策略.

主要方法:

在微生物脱系统中纳入 pyrogenic 碳.
使用混合微生物培养物,包括Clostridium sp.,Sporanaerobacter,Sedimentibacter,Paraclostridium和Tissierella. 这种微生物培养物可以在植物中使用.
在80天内量化TCE降解和乙烯生产.

主要成果:

在80天内实现了150μmol L-1 TCE的几乎完全减少.
观察到显著的乙烯绑定,范围为72.2-122.3μmol L-1.1.
证明了从电活性微生物到TCE的增强电子转移,这是由火性碳的电子潜水能力所促进的.

结论:

燃烧性碳和电活性微生物之间的协同作用显著增强了TCE脱化.
燃烧性碳作为一种有效的电子穿器,克服了传统依赖OHRB的方法的局限性.
这种没有OHRB的战略为修复被碳化合物污染的环境提供了一个有希望和有效的方法.

关键词:

电活性微生物电活性微生物燃烧性碳是什么? 燃烧性碳是什么?在TCE中脱.

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