摘要
选取产碳酸酐酶菌,并将其引入砂岩-CO_(2)-水相互作用的短期试验,对溶液化学性质、岩石矿物溶解-沉淀过程以及碳酸氢根离子浓度变化进行检测分析.结果表明,在50℃、10MPa的条件下反应20d后,体系pH值提升,微生物组pH值略高于对照组,细菌的参与显著加速了岩石矿物的溶蚀沉淀过程,使岩心孔隙度从15.02%降低到13.27%.在固液比为1:5的1L溶液中,对照组和微生物组有效的CO_(2)封存量分别为0.207,0.726g,加微生物的固碳效果更好,证明了产碳酸酐酶菌对CO_(2)地质封存具有一定的促进作用.
In this study,carbonic anhydrase-producing bacteria were selected and introduced into short-term experiments involving sandstone-CO_(2)-water interactions.The chemical properties of the solution,the dissolution-precipitation process of rock minerals,and the changes in bicarbonate ion concentration were analyzed and detected.The results showed that after 20days of reaction under conditions of 50℃and 10MPa,the pH of the system increased,and the microbial group pH was slightly higher than that of the control group.The participation of bacteria significantly accelerated the dissolution and precipitation processes of rock minerals,reducing the core porosity from 15.02%to 13.27%.In a 1-liter solution with a solid-to-liquid ratio of 1:5,the effective CO_(2)sequestration amounts for the control group and the microbial group were 0.207g and 0.726g,respectively.The addition of microorganisms resulted in better carbon fixation,demonstrating that carbonic anhydrase-producing bacteria have a certain promoting effect on CO_(2)geological sequestration.
作者
王布康
钱春香
WANG Bu-kang;QIAN Chun-xiang(Research Center of Green Construction Materials&Carbon Utilization,School of Materials Science and Engineering,Southeast University,Nanjing 211189,China)
出处
《中国环境科学》
北大核心
2025年第3期1568-1575,共8页
China Environmental Science
基金
国家自然科学基金资助项目(U22B20146)。
关键词
CO_(2)
地质封存
微生物
水岩反应
CO_(2)
geological sequestration
microbes
water-rock reaction
