摘要
为了研究土著微生物对CO2地质储存过程中水岩作用的影响,进行了摇瓶实验和高压釜模拟实验。结果表明:细菌的作用促进了含钙碳酸盐的形成;真菌使固碳离子的溶出量增大;放线菌促进了含铁碳酸盐的形成。细菌实验组与高压釜模拟实验中岩石样品表面均形成了未知的硅铝酸盐矿物,这些硅铝酸盐的沉淀为CO2的固定起到积极的作用。如果反应时间足够长,溶液中的碳酸盐就可能以方解石、菱镁矿、菱铁矿等矿物的形式析出,从而实现CO2在地下的永久储存。
The authors studied the influence of indigenous microorganisms on dissolution and precipitation of the minerals under conditions of high-pressure CO2 presence in deep saline geological formations. A series of experiments in shake flasks at ambient pressure and autoclaves were performed, in order to simulate the underground temperature, pressure and water environment. The results showed that calcium carbonate deposited on the surface of the minerals with the growth of bacteria. However, the dissolution rate of some carbon sequestration ions increased with the growth of fungi. Deposition amounts of iron carbonates on the surface of the minerals were enhanced by the growth of actinomycetes. Both the bacteria experiments and the autoclave experiments showed a kind of un identified mineral precipitated on the surface of the rock samples, which potentially promoted the fixing of CO2 in underground. If the reaction time was long enough, the bicarbonate could turn into some carbonate minerals, such as CaCO3, MgCOa, and FeCOa. Thus, it is possible to store CO2 underground permanently.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2013年第2期544-551,共8页
Journal of Jilin University：Earth Science Edition
基金
中国地质调查局工作项目(1212011120048)
关键词
微生物
CO2
碳酸盐
地质储存
microorganisms carbon dioxide carbonates geological storage
