干旱区生态环境知识资源中心(Arid): Mitigating wind erosion of sand using biopolymer-assisted EICP technique

Arid

DOI	10.1016/j.sandf.2020.02.011
	Mitigating wind erosion of sand using biopolymer-assisted EICP technique
	Almajed, Abdullah 1; Lemboye, Kehinde 1; Arab, Mohamed G.2,3; Alnuaim, Ahmed 1
通讯作者	Almajed, Abdullah
来源期刊	SOILS AND FOUNDATIONS
ISSN	0038-0806
出版年	2020
卷号	60 期号:2 页码:356-371
英文摘要	A study was conducted to stabilize An Nafud desert sand against wind-induced erosion employing enzyme-induced carbonate precipitation (EICP) assisted by a sodium alginate (SA) biopolymer. Biopolymers occur naturally in brown seaweed, are inexpensive, and are used extensively in the food, textile, and paper industries as thickeners and emulsifiers. A wind tunnel experiment was conducted to evaluate the wind erosion rate of samples treated surficially by spraying various concentrations of mixes using EICP and SA solutions. The unconfined strength of the resulting crust that formed was measured with a hand penetrometer. Scanning electron microscope (SEM) imaging and X-Ray diffraction (XRD) were conducted to study the microstructure and to identify the presence of crystalline materials, respectively, in treated and untreated sand samples. The results indicate that combining EICP and SA led to a significant improvement in the erosion rate by 100% compared to the untreated samples, with effective results recorded at lower concentrations of SA. The improvement is mainly attributed to the inter-particle bonding effect of both the carbonate precipitant and the biopolymer. The unconfined strength of the crust that formed by means of the solution treatment increased with an increase in the concentration of the biopolymer. This increase is attributed to the lower viscosity of the biopolymer solution and the cross linking of the biopolymer due to the presence of divalent calcium ions. The soil treated with EICP alone had the lowest strength, and increments in the molar concentration of the calcium chloride had no effect on the surface strength. (C) 2020 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
英文关键词	CaCO3 EICP Erosion Soil improvement Urea hydrolysis
类型	Article
语种	英语
国家	Saudi Arabia ; U Arab Emirates ; Egypt
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000543370000004
WOS关键词	SODIUM ALGINATE ; CARBONATE PRECIPITATION ; CALCITE PRECIPITATION ; SOIL STABILIZATION ; CEMENTATION ; IMPROVEMENT ; CACL2
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS研究方向	Engineering ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319799
作者单位	1.King Saud Univ KSU, Dept Civil Engn, Riyadh 11421, Saudi Arabia; 2.Univ Sharjah, Coll Engn, Dept Civil & Environm Engn, POB 27272 Sharjah, Sharjah, U Arab Emirates; 3.Mansoura Univ, Dept Struct Engn, Mansoura, Egypt
推荐引用方式 GB/T 7714	Almajed, Abdullah,Lemboye, Kehinde,Arab, Mohamed G.,et al. Mitigating wind erosion of sand using biopolymer-assisted EICP technique[J],2020,60(2):356-371.
APA	Almajed, Abdullah,Lemboye, Kehinde,Arab, Mohamed G.,&Alnuaim, Ahmed.(2020).Mitigating wind erosion of sand using biopolymer-assisted EICP technique.SOILS AND FOUNDATIONS,60(2),356-371.
MLA	Almajed, Abdullah,et al."Mitigating wind erosion of sand using biopolymer-assisted EICP technique".SOILS AND FOUNDATIONS 60.2(2020):356-371.