干旱区生态环境知识资源中心(Arid): Potential Drought Mitigation Through Microbial Induced Calcite Precipitation-MICP

Arid

DOI	10.1029/2020WR029434
	Potential Drought Mitigation Through Microbial Induced Calcite Precipitation-MICP
	Liu, Bo; Tang, Chao-Sheng; Pan, Xiao-Hua; Zhu, Cheng; Cheng, Yao-Jia; Xu, Jin-Jian; Shi, Bin
通讯作者	Tang, CS ; Pan, XH (corresponding author), Nanjing Univ, Sch Earth Sci & Engn, Nanjing, Peoples R China.
来源期刊	WATER RESOURCES RESEARCH
ISSN	0043-1397
EISSN	1944-7973
出版年	2021
卷号	57 期号:9
英文摘要	Extreme drought events occur more frequently due to climate change. Soil water loss through evaporation is therefore significantly intensified. This study introduces an environment-friendly and sustainable bio-mediated technique, known as microbially induced calcite precipitation (MICP), for water evaporation suppression in clayey soils. Through lab-scale evaporation tests, we investigate the effects of cementation solution concentration (0.5, 1.0, and 1.5 mol/L) and MICP treatment procedure (one-phase and two-phase MICP methods) on both macroscale (e.g., water loss, desiccation cracking) and microscale (e.g., microstructure variations) behaviors of soils. Experimental results show that MICP is capable of improving water retention capacity and enhancing the inter-particle bonding of clayey soils. Both water evaporation rate and total water loss decrease with the increasing concentration of cementation solution and the number of MICP treatment cycle. For most testing samples, both one-phase and two-phase MICP treatment methods have a similar influence on soil properties. Further microstructure characterizations reveal four key factors contributing to the improved soil response under drying, including dense surface crust, remediated desiccation cracks, smaller pore size and residual solutes. Dense structure of surface crust suppresses the migration of water vapor into the atmosphere. Calcite crystals tend to reduce the evaporation surface if precipitated within cracks, and clog the movement of pore water if precipitated within the soil pore space. This study is expected to improve the fundamental understanding of soil-atmosphere interactions under MICP treatment and provide insights into the potential application of bio-mediated technologies as a nature-based solution for drought mitigation in arid and semi-arid region.
英文关键词	drought mitigation microbially induced calcite precipitation soil water evaporation control clayey soil soil water retention soil microstructure
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000703704400036
WOS关键词	CARBONATE PRECIPITATION ; DESICCATION CRACKING ; WATER EVAPORATION ; SOIL ; BEHAVIOR ; SURFACE ; MICROORGANISMS ; CEMENTATION ; REDUCTION ; PATTERNS
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
来源机构	南京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364870
作者单位	[Liu, Bo; Tang, Chao-Sheng; Pan, Xiao-Hua; Cheng, Yao-Jia; Xu, Jin-Jian; Shi, Bin] Nanjing Univ, Sch Earth Sci & Engn, Nanjing, Peoples R China; [Zhu, Cheng] Rowan Univ, Dept Civil & Environm Engn, Glassboro, NJ USA
推荐引用方式 GB/T 7714	Liu, Bo,Tang, Chao-Sheng,Pan, Xiao-Hua,et al. Potential Drought Mitigation Through Microbial Induced Calcite Precipitation-MICP[J]. 南京大学,2021,57(9).
APA	Liu, Bo.,Tang, Chao-Sheng.,Pan, Xiao-Hua.,Zhu, Cheng.,Cheng, Yao-Jia.,...&Shi, Bin.(2021).Potential Drought Mitigation Through Microbial Induced Calcite Precipitation-MICP.WATER RESOURCES RESEARCH,57(9).
MLA	Liu, Bo,et al."Potential Drought Mitigation Through Microbial Induced Calcite Precipitation-MICP".WATER RESOURCES RESEARCH 57.9(2021).