干旱区生态环境知识资源中心(Arid): Experimental investigation to mitigate aeolian erosion via biocementation employed with a novel ureolytic soil isolate

Arid

DOI	10.1016/j.aeolia.2021.100727
	Experimental investigation to mitigate aeolian erosion via biocementation employed with a novel ureolytic soil isolate
	Dubey, Anant Aishwarya; Devrani, Rituraj; Ravi, K.; Dhami, Navdeep Kaur; Mukherjee, Abhijit; Sahoo, Lingaraj
通讯作者	Ravi, K (corresponding author), Indian Inst Technol, Dept Civil Engn, Gauhati 781039, India.
来源期刊	AEOLIAN RESEARCH
ISSN	1875-9637
EISSN	2212-1684
出版年	2021
卷号	52
英文摘要	Aeolian ecosystems suffer severe land degradation due to wind erosion. This study presents the erosion mitigation via bio-cementation technique for the soil collected from Jaisalmer region of the Thar Desert of India. Most of the previous studies considered conventional microbe Sporosarcina pasteurii for aeolian erosion mitigation. Alternatively, as the soils containing vegetation are rich in microbial diversity, this study presents isolation and characterisation of a novel urease-positive microbial strain from a soil slope, which is later utilised for the aeolian-erosion mitigation. The desert sand was subjected to biocementation treatment using the isolated microbe and various molar concentrations (M) of cementation solution, ranging from 0.25 M to 1 M. The engineering properties of the biocemented sand such as coefficient of permeability (k), unconfined compressive strength (UCS), and erodibility was investigated. The soil erosion test was conducted in a lab-scale wind tunnel to investigate parameters such as soil mass loss and threshold detachment velocity. The investigation revealed a decrease of one order in the magnitude of the permeability coefficient with 1 M biocementation treatment. A high UCS value of around 1 MPa was observed with a low calcium carbonate content of 1.3% precipitated with 0.5 M cementation solution treatment. The erosion resistance is observed to be maximum with 1 M cementation solution treatment withstanding the maximum wind velocity above 55 km/h. With lab-scale investigation, this study confirms drastic improvement in soil erodibility resistance with biocementation using the isolated microbe and encourages field trial for protecting the desert ecosystem from severe erosion.
英文关键词	The Thar Desert Aeolian erosion Sand-dune stabilisation Bio-mediated soil improvement
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000704129400002
WOS关键词	INDUCED CARBONATE PRECIPITATION ; UREASE ACTIVITY ; SAND ; CALCITE ; IMPROVEMENT ; MICP ; OPTIMIZATION ; BACTERIA
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362334
作者单位	[Dubey, Anant Aishwarya; Ravi, K.] Indian Inst Technol, Dept Civil Engn, Gauhati 781039, India; [Dubey, Anant Aishwarya; Dhami, Navdeep Kaur; Mukherjee, Abhijit] Curtin Univ, Sch Civil & Mech Engn, Perth, WA, Australia; [Devrani, Rituraj] Indian Inst Technol, Dept Civil Engn, Delhi 110016, India; [Sahoo, Lingaraj] Indian Inst Technol, Dept Biosci & Bioengn, Gauhati 781039, India
推荐引用方式 GB/T 7714	Dubey, Anant Aishwarya,Devrani, Rituraj,Ravi, K.,et al. Experimental investigation to mitigate aeolian erosion via biocementation employed with a novel ureolytic soil isolate[J],2021,52.
APA	Dubey, Anant Aishwarya,Devrani, Rituraj,Ravi, K.,Dhami, Navdeep Kaur,Mukherjee, Abhijit,&Sahoo, Lingaraj.(2021).Experimental investigation to mitigate aeolian erosion via biocementation employed with a novel ureolytic soil isolate.AEOLIAN RESEARCH,52.
MLA	Dubey, Anant Aishwarya,et al."Experimental investigation to mitigate aeolian erosion via biocementation employed with a novel ureolytic soil isolate".AEOLIAN RESEARCH 52(2021).