石和锡对微生物电合成细胞中甲和酸盐生产的作用 石和锡对二氧化碳养的微生物电合成细胞的作用
Rihab Gharbi1,2, Sasha Omanovic1, Sabahudin Hrapovic2
1Department of Chemical Engineering, McGill University, 3610 University St., Montreal, QC H3A 0C5, Canada.
Molecules (Basel, Switzerland)
|January 23, 2024
概括
和锡离子对甲 (CH4) 和酸盐的微生物电合成产生影响. 在电极上的锡电增强了CH4的产生,而斯木减少了它,这表明金属对微生物活动和CO2转化具有特定的影响.
科学领域:
- 环境科学与工程环境科学与工程
- 微生物学 微生物学
- 电化学 电化学 电化学
背景情况:
- 微生物电合成 (MES) 为将二氧化碳 (CO2) 转化为甲 (CH4) 和挥发性脂肪酸等有价值产品提供了一个可持续的途径.
- 过渡金属在二氧化碳电还原中的催化潜力和它们对MES系统内的微生物群落的影响得到了探索.
- 了解不同金属离子,如 (Bi) 和锡 (Sn) 的特定影响,对于优化MES性能至关重要.
研究的目的:
- 研究 (Bi3+) 和锡 (Sn2+) 离子对微生物电合成细胞 (MESC) 中甲 (CH4) 和挥发性脂肪酸生产的影响.
- 评估这些金属对变性和乙类甲原性微生物活性的影响.
- 探索用电沉积锡和石修改电极表面的潜力,以提高CH4的产量.
主要方法:
- 使用无氧污泥进行了批量瓶测试,以评估各种过渡金属离子 (Ni2+,Fe2+,Cu2+,Sn2+,Mn2+,MoO42-,Bi3+) 对微生物活性的影响.
- 实验室规模的MESC被采用了持续的CO2供应,其中Bi3+和Sn2+被添加到0.1gL-1度的阴极中.
- 在注射之前,通过对Sn金属和Bi金属的电沉积来修改碳感电极,以评估它们对CH4生产的影响.
主要成果:
- 铜离子 (Cu2+) 显著抑制了CH4和酸盐的产生,尽管它们已知的催化性能.
- 离子 (Bi3+) 最初增加了CH4的产量,而锡离子 (Sn2+) 则显示了CH4和酸盐的初始增加.
- 在碳感应电极上放置Sn金属的电使CH4的产量增加了一倍,并减少了乙酸的积累,而Bi电降低了CH4的产量.
结论:
- 石和锡离子对微生物电合成产生不同的影响,影响甲生产和微生物社区活动.
- 通过锡电极沉积进行电极改造,为增强MESC中甲生成提供了一个有希望的策略.
- 乙酸的积累表明,可能是由于高的部分压力,可能会抑制乙类甲原体的潜在抑制,需要进一步研究微生物群落动态.
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