Impacts of NO 2 Impurities on the Indigenous Microbial Community Structure and Diversity in CO 2 -Saline-Sandstone Interaction System

Chenyang Li, Yunpeng Song, Yongjuan Zhu, Qingwei Meng and Ying Lyu
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Chenyang Li: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
Yunpeng Song: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
Yongjuan Zhu: School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China
Qingwei Meng: Changchun Monitoring Station of National Urban Water Supply Quality Monitoring Network, Changchun 130000, China
Ying Lyu: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China

Sustainability, 2021, vol. 13, issue 11, 1-16

Abstract: Laboratory experiments (150 days) were performed to analyze the influence of NO 2 impurities on indigenous microbial communities and diversity with 16S rRNA sequence at real GCS site (Geological CO 2 Sequestration, ordos, China) conditions (pressure: 15 MPa, temperature: 55 °C). The possible impact of metabolic activity on the GCS process was investigated through the BLASTn search. Compared with the pure CO 2 , results demonstrate that the biomass and biodiversity were lower, due to the lower pH, within 60 days after the co-injection of 0.1% NO 2 . Subsequently, the pH was quickly buffered through the corrosion of feldspar and clay, and the impact of NO 2 had almost no obvious effect on the microbial structure except the abundance of phylum and genus after 90 days. In addition, acid-producing bacteria appeared after 60 days, such as Bacillus , Acinetobacter, and Lactococcus , etc., lower the pH in the solution and accelerate the dissolution of minerals. The Fe (III)-reducing microbes Citrobacter freundii reduce the Fe (III) released from minerals to Fe (II) and induce siderite (FeCO 3 ) biomineralization through biogeochemical processes. Therefore, the co-injection of trace NO 2 will not significantly affect the growth of microorganisms on long timescale.

Keywords: NO 2 impurities; geological CO 2 sequestration; indigenous microbial communities; diversity (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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