碳酸酶产生的细菌介导的砂岩-CO2 -盐水相互作用及其对碳封存的影响
Bukang Wang1, Yaya Yuan1, Chunxiang Qian1
1School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China; State Key Laboratory of Engineering Materials for Major Infrastructure, Southeast University, Nanjing, 211189, China.
Environmental research
|September 20, 2025
概括
像Bacillus licheniformis这样的微生物通过加速矿物形成来增强二氧化碳 (CO2) 的地质封存. 这项研究表明,微生物提高了二氧化碳的稳定性,并减少了地下储存中的泄漏风险.
科学领域:
- 地质化学 地质化学
- 微生物学 微生物学
- 环境科学 环境科学
背景情况:
- 二氧化碳 (CO2) 的地质封存对于减少温室气体至关重要.
- 传统的方法面临着长周期和二氧化碳不稳定的挑战,有可能泄漏.
- 地下环境中的微生物介导反应对于二氧化碳储存的稳定性至关重要.
研究的目的:
- 研究微生物介导的水岩反应对二氧化碳地质储存的影响.
- 分析Bacillus licheniformis对砂岩-CO2-盐水系统中的矿物溶解-沉的影响.
- 评估微生物在提高二氧化碳封存的稳定性和安全性的潜力.
主要方法:
- 从深层盐水层中选细菌 (Bacillus licheniformis) 进行查.
- 在受控条件下 (50°C,10 MPa) 将微生物引入砂岩-CO2-盐水系统.
- 在60天内监测细菌生长,溶液化学和岩石特性.
主要成果:
- 细菌菌表现出对富含二氧化碳的极端环境具有很高的耐受性.
- 微生物活动增加了系统pH值和二碳酸离子度,促进了二氧化碳溶液的捕获.
- 加快的矿物溶解-沉导致岩石核心质量增加,孔隙性减少 (12.61%至10.75%).
结论:
- 微生物通过促进矿物捕获,显著增强二氧化碳的地质封存.
- 菌 (Bacillus licheniformis) 提高了地下二氧化碳储存的稳定性和安全性.
- 微生物增强过程为有效的碳捕获和储存解决方案提供了一个有希望的途径.
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