干旱区生态环境知识资源中心(Arid): Field experimental study on stability of bio-mineralization crust in the desert

Arid

DOI	10.16285/j.rsm.2018.0677
	Field experimental study on stability of bio-mineralization crust in the desert
	Li Chi; Wang Shuo; Wang Yan-xing; Gao Yu; Bai Siriguleng
通讯作者	Li, C
来源期刊	ROCK AND SOIL MECHANICS
ISSN	1000-7598
出版年	2019
卷号	40 期号:4 页码:1291-1298
英文摘要	Microbial induced calcite precipitation (MICP) technology is applied to the formation of in-situ bio-mineralization crust on the surface of desert, which enables floating dune to be semi-fixed and fixed, hinders wind erosion, and fundamentally blocks the source of sandstorm. Two bio-mineralization test plots (TP1 and TP3) were built using two different microbial strains on the Aeolian sand surface in Ulan Buh desert, Inner Mongolia Autonomous Region of China. The field-scale experiment methods and processes were designed to evaluate and analyze the strength of bio-mineralization crust and its long-term stability in the desert environment. Staphylococcus, extracted from local Aeolian sand, and Sporoscarcina pasteurii, a traditional bio-mineralized bacterium, were used to induce the formation of calcium carbonate crystals. Through penetration tests in site, the penetration resistance developed along the depth of bio-mineralization crust was recorded on the 7th, 14th, 28th, 60th and 210th day. The strength of bio-mineralization crust was converted according to the value of average penetration resistance at 2.0 cm of the crust. The variation of strength of bio-mineralization crust with mineralization time was summarized. From visual observation in site, the bio-mineralization crust began to form on the 4th day. The average thickness ranges from 2.0 cm to 2.5 cm on the 7th day, and the strength of bio-mineralization crust induced from Staphylococcus was 1.05 times than that of Sporoscarcina pasteurii. For the bio-mineralization crust TP3 induced from Sporoscarcina pasteurii after freeze-thaw cycles on the 210th day, the average thickness decreased from 0.7cm to 1.0cm, the strength was reduced by 19% and the content of calcium carbonate was reduced by 15%-30% compared with that on the 7th day. However, the strength of bio-mineralization crust TP1 induced from Staphylococcus on the 210 th day was reduced only by 2%, which is a little less than that on the 7th day. MICP technology can be applied to the formation of in situ bio-mineralization crust in desert. The bio-mineralization crust developed from Staphylococcus has better strength performance and long-term stability in desert environment than that from Sporoscarcina pasteurii.
英文关键词	microbial induced calcite precipitation (ICP) technology Staphylococcus long-term stability bio-mineralization crust field-scale test
类型	Article
语种	中文
收录类别	ESCI
WOS记录号	WOS:000487850300007
WOS关键词	MICROBIAL CARBONATE PRECIPITATION ; IMPROVEMENT ; SAND
WOS类目	Engineering, Geological
WOS研究方向	Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/333828
作者单位	[Li Chi; Wang Shuo; Gao Yu] Inner Mongolia Univ Technol, Coll Civil Engn, Hohhot 010051, Inner Mongolia, Peoples R China; [Wang Yan-xing; Bai Siriguleng] Inner Mongolia Univ Technol, Coll Sci, Hohhot 010051, Inner Mongolia, Peoples R China
推荐引用方式 GB/T 7714	Li Chi,Wang Shuo,Wang Yan-xing,et al. Field experimental study on stability of bio-mineralization crust in the desert[J],2019,40(4):1291-1298.
APA	Li Chi,Wang Shuo,Wang Yan-xing,Gao Yu,&Bai Siriguleng.(2019).Field experimental study on stability of bio-mineralization crust in the desert.ROCK AND SOIL MECHANICS,40(4),1291-1298.
MLA	Li Chi,et al."Field experimental study on stability of bio-mineralization crust in the desert".ROCK AND SOIL MECHANICS 40.4(2019):1291-1298.