生物炭通过调节代谢物的反抑制来促进微生物的CO2固定
Xiaodi Zhao1, Yundong Liu2, Li Xie3
1State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai City 200092, China; Research Institute for Shanghai Pollution Control and Ecological Security, Shanghai City 200092, China; Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai City 200444, China.
低释放生物炭 (BC-LR) 有效地吸附化学自营物中的抑制性细胞外自由有机碳 (EFOC). 这促进了微生物生长和生物碳固定,为代谢反抑制提供了经济的解决方案.
科学领域:
- 微生物生态学 微生物生态学
- 生物地质化学生物地质化学
- 环境科学 环境科学
背景情况:
- 化学自营菌对生物碳固定至关重要,它利用无机物质获得能量,并利用二氧化碳进行生长.
- 细胞外自由有机碳 (EFOC) 被化学自营养素释放会导致反抑制,阻碍他们自己的新陈代谢.
- 缓解EFOC积累对于增强化学自营性活性和碳固定效率至关重要.
研究的目的:
- 调查低释放生物炭 (BC-LR) 在吸附EFOC和减轻化学自营物中反抑制方面的有效性.
- 为了比较BC-LR与普通生物炭和颗粒活性炭在促进微生物生长和二氧化碳固定方面的性能.
- 为增强生物碳固定提供经济可行的战略.
主要方法:
- 低释放生物炭 (BC-LR) 应用于化学自营培养,以吸附细胞外自由有机碳 (EFOC).
- 在Transwell培养系统中对BC-LR,普通生物炭和颗粒活性炭进行比较分析.
- 在不同的生物炭处理下测量微生物生长率和二氧化碳固定率.
主要成果:
- BC-LR有效地吸收了EFOC,特别是低分子量抑制性有机成分.
- 在Transwell培养物中,BC-LR添加显著促进了190%的化疗自营微生物生长和29%的CO2固定.
- 普通的生物炭无法吸附EFOC并抑制微生物活动,而BC-LR则表现出优越的性能和经济优势,而不是颗粒状活性炭.
结论:
- 低释放生物炭 (BC-LR) 是一个有希望的材料,可以减轻化学自营代谢中EFOC引起的反抑制.
- BC-LR增强了微生物生长和生物碳固定,为环境应用提供了具有成本效益的方法.
- 这项研究提供了对生物炭-自营物相互作用的新见解,支持可持续的生物二氧化碳固定策略.
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