干旱区生态环境知识资源中心(Arid): Microbially induced carbonate precipitation for wind erosion control of desert soil: Field-scale tests

Arid

DOI	10.1016/j.geoderma.2020.114723
	Microbially induced carbonate precipitation for wind erosion control of desert soil: Field-scale tests
	Meng, Hao; Gao, Yufeng; He, Jia; Qi, Yongshuai; Hang, Lei
通讯作者	Gao, YF
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2021
卷号	383
英文摘要	This study examined the potential of microbially induced carbonate precipitation (MICP) in reducing wind erosion of desert soil. Field tests were conducted on artificial mounds and bare sandy land located in Ulan Buh Desert, Ningxia Hui Autonomous Region, China. Results showed that the MICP method could significantly enhance the bearing capacity and wind erosion resistance of the surficial soil through the formation of soil crusts. The optimal cementation solution (containing equimolar urea and calcium chloride) concentration and spraying volume, were 0.2 M and 4 L/m(2), respectively. Under this condition, the soil crusts, with a thickness of 12.5 mm and a calcium carbonate (CaCO3) content of 0.57%, remained intact on the surface of man-made mounds after being exposed to a 30 m/s wind for 2 min. For the sandy land, the soil bearing capacity could reach its maximum of 459.9 kPa (as measured with a 6 mm-diameter handheld penetrometer) within three days, and the depth of wind erosion was approximately zero after 30 days of exposure to the local weather conditions. Furthermore, the biocementation method showed its ecological compatibility at the optimal dosage. Scanning electron microscopy (SEM) tests with energy dispersive X-ray (EDX) confirmed the bridge effect of CaCO3 crystals. Longer-term durability of MICP treatment was evaluated, and the results showed that soil bearing capacity and wind erosion resistance of the sandy land was significantly improved over 180 days. These findings suggest that MICP is a promising candidate to protect desert soils from wind erosion.
英文关键词	Microbially induced carbonate precipitation (MICP) Biocementation Calcium carbonate Wind erosion control Desert soil Field tests
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000590747800009
WOS关键词	SAND ; DESERTIFICATION ; CEMENTATION ; SURFACE ; UREASE ; BIOCEMENTATION ; STABILIZATION ; IMPROVEMENT ; PASTEURII ; TEXTURE
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	河海大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328007
作者单位	[Meng, Hao; Qi, Yongshuai; Hang, Lei] Hohai Univ, Coll Civil & Transportat Engn, Nanjing 210098, Jiangsu, Peoples R China; [Gao, Yufeng; He, Jia] Hohai Univ, Key Lab Minist Educ Geomech & Embankment Engn, Nanjing 210098, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Meng, Hao,Gao, Yufeng,He, Jia,et al. Microbially induced carbonate precipitation for wind erosion control of desert soil: Field-scale tests[J]. 河海大学,2021,383.
APA	Meng, Hao,Gao, Yufeng,He, Jia,Qi, Yongshuai,&Hang, Lei.(2021).Microbially induced carbonate precipitation for wind erosion control of desert soil: Field-scale tests.GEODERMA,383.
MLA	Meng, Hao,et al."Microbially induced carbonate precipitation for wind erosion control of desert soil: Field-scale tests".GEODERMA 383(2021).