Effects of superabsorbent polymers on the vertical infiltration of soil water with sand mulching

doi:10.1007/s12665-019-8665-6

	Effects of superabsorbent polymers on the vertical infiltration of soil water with sand mulching
	Zhao, Wenju; Hu, Jiazhen; Cui, Zhen; Dou, Pinxin; Fan, Yanwei
	2019-12
发表期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
卷号	78 期号:23
摘要	Superabsorbent polymer (SAP) is a kind of polymer with advantages like high water absorption and conservation. We studied the effect of various concentrations of SAPs on the infiltration of soil water with sand mulching. Five soil columns with surface sand mulch and evenly distributed SAPs at concentrations of 0, 0.1, 0.2, 0.5 and 1.0% were tested. The SAPs slowed the migration of the wetting front and thus the rate of infiltration of water, and the higher the SAP concentration, the slower the migration. The relationship between the wetting front displacement and time could be described by a logarithmic function, Z f = atb. The amount of cumulative infiltration was inversely proportional to the amount of SAPs. The final cumulative infiltration was proportional to the amount of SAPs, within a limited range. The relationship between cumulative infiltration and time was described by a power function, I = ctd. The relationship between wetting front displacement and cumulative infiltration could be characterized by a linear equation, I = KZ f + E, indicating that the rate of cumulative infiltration increased with the amount of SAPs for the same infiltration depth, which satisfied the Kostiakov model ( i = Bt-A). High concentrations of SAPs strongly inhibited the infiltration of water. The infiltration rate of soil water was optimal at a SAP concentration of 0.2%, which effectively increased the amount of water in the soil.
关键词	Sand Superabsorbent polymers Wetting front Infiltration Kostiakov model
DOI	10.1007/s12665-019-8665-6
收录类别	SCI ; SCIE
语种	英语
资助项目	National Natural Science Foundation of China[51869010] ; Guidance Program for Industrial Support of Colleges and Universities in Gansu Province[2019C-13]
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000496513500001
出版者	SPRINGER
EI入藏号	20194707708043
EI主题词	Infiltration
EI分类号	483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 815.1 Polymeric Materials
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/64171
专题	能源与动力工程学院
通讯作者	Zhao, Wenju
作者单位	Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou, Gansu, Peoples R China
第一作者单位	能源与动力工程学院
通讯作者单位	能源与动力工程学院
第一作者的第一单位	能源与动力工程学院
推荐引用方式 GB/T 7714	Zhao, Wenju,Hu, Jiazhen,Cui, Zhen,et al. Effects of superabsorbent polymers on the vertical infiltration of soil water with sand mulching[J]. ENVIRONMENTAL EARTH SCIENCES,2019,78(23).
APA	Zhao, Wenju,Hu, Jiazhen,Cui, Zhen,Dou, Pinxin,&Fan, Yanwei.(2019).Effects of superabsorbent polymers on the vertical infiltration of soil water with sand mulching.ENVIRONMENTAL EARTH SCIENCES,78(23).
MLA	Zhao, Wenju,et al."Effects of superabsorbent polymers on the vertical infiltration of soil water with sand mulching".ENVIRONMENTAL EARTH SCIENCES 78.23(2019).