title: Evaluation of CO₂ solubility-trapping and mineral-trapping in microbial-mediated CO₂-brine-sandstone interaction.
abstract: Evaluation of CO₂ solubility-trapping and mineral-trapping by microbial-mediated process was investigated by lab experiments in this study. The results verified that microbes could adapt and keep relatively high activity under extreme subsurface environment (pH<5, temperature>50 °C, salinity>1.0 mol/L). When microbes mediated in the CO₂-brine-sandstone interaction, the CO₂ solubility-trapping was enhanced. The more biomass of microbe added, the more amount of CO₂ dissolved and trapped into the water. Consequently, the corrosion of feldspars and clay minerals such as chlorite was improved in relative short-term CO₂-brine-sandstone interaction, providing a favorable condition for CO₂ mineral-trapping. Through SEM images and EDS analyses, secondary minerals such as transition-state calcite and crystal siderite were observed, further indicating that the microbes played a positive role in CO₂ mineral trapping. As such, bioaugmentation of indigenous microbes would be a promising technology to enhance the CO₂ capture and storage in such deep saline aquifer like Erdos, China.
authors.affiliation: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Lu
authors.affiliation: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China.
authors.forename: Fengjun
authors.initials: F
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China. Electronic address: lvcong@jlu.edu.cn.
authors.forename: Cong
authors.initials: C
authors.lastname: Lu
authors.affiliation: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China.
authors.forename: Juanjuan
authors.initials: J
authors.lastname: Du
authors.affiliation: College of Construction Engineering, Jilin University, Changchun 130021, China.
authors.forename: Rongyue
authors.initials: R
authors.lastname: Zhu
authors.affiliation: Liaoning Institute of Mineral Exploration, Shenyang 110032, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Sun
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry*; D002119:Calcium Carbonate / Q000737:chemistry; D002245:Carbon Dioxide / Q000737:chemistry*; D002681:China; D000077215:Clay; D003013:Clostridium / Q000502:physiology; D060587:Groundwater / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007709:Klebsiella / Q000502:physiology; D008903:Minerals / Q000737:chemistry; D016981:Plesiomonas / Q000502:physiology; D017680:Potassium Compounds / Q000737:chemistry*; D054712:Salinity; D012492:Salts / Q000737:chemistry*; D012995:Solubility; D013696:Temperature; D014871:Water Microbiology; D014873:Water Pollutants / Q000737:chemistry
chemical_list: D000538:Aluminum Silicates; D008903:Minerals; D017680:Potassium Compounds; D012492:Salts; D014873:Water Pollutants; C017082:brine; C016447:feldspar; D002245:Carbon Dioxide; D002119:Calcium Carbonate; D000077215:Clay
keywords: Carbon capture and geological storage (CCS); Chlorite; Indigenous microbe; Siderite; Transition-state calcite