Capillary forces between particles: role of biochar in improving water retention capacity of soil

doi:10.1007/s12517-021-08211-y

CORC > 兰州理工大学 > 兰州理工大学

	Capillary forces between particles: role of biochar in improving water retention capacity of soil
	Zhao, Xiaozheng 1; Hu, Mingming 2
刊名	ARABIAN JOURNAL OF GEOSCIENCES
	2021-09
卷号	14 期号:17
关键词	Particle simulation Liquid bridge Capillary force Fractal dimension Water retention capacity of soils
ISSN号	1866-7511
DOI	10.1007/s12517-021-08211-y
英文摘要	Biochar, as a soil additive, will inevitably affect the transformation process of soil and water interactions. Biochar plays an important role in reducing soil degradation. The capillary water in soil affects the stability of the soil structure. The characteristics of the capillary force between the soil and biochar particles are investigated in this study. Based on an advanced capillary force measurement system, biochar and soil particles are simplified as spherical particles of equal size. The image of the liquid bridge between different particles is recorded by a high-speed camera (AOSVI-HD202WF). Based on digital image processing technology, the fractal dimension of the image is calculated, and the influence of the liquid volume and particle properties is analyzed. The results indicate that the capillary force between the particles decreases with increase in interparticle distance. Due to the increase of the liquid volume, the initial capillary force between the biochar and soil particles is increased from 3.6x10(-4) to 4.4x10(-4) N, and the fracture distance of the liquid bridge is increased from 0.41 to 0.70 mm, respectively, for a liquid volume from 0.8 to 2.4 ul. The fractal dimension of morphology of the liquid bridge between the particles increased and decreased in a cycle (C). It is found that the variation of the liquid bridge between the particles is stable with a high liquid volume (>= 2.4 ul). It is also found that the cycle period of the liquid bridge between the biochar and soil particles is not affected by the liquid volume. The calculated capillary forces between the biochar and soil particles by using a Laplace-Young equation have been well verified by the experimental data. Biochar has an effect on the stability of the capillary force of the liquid bridge between the soil particles. Biochar-soil particles can be effectively combined to improve the capillary force and water retention capacity of the soil.
WOS研究方向	Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000686094000006
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148831]
专题	兰州理工大学
作者单位	1.Lanzhou Univ Technol, Sch Civil Engn, 287 Langongping Rd, Lanzhou 730050, Gansu, Peoples R China; 2.Xuchang Univ, Sch Civil Engn, 88 Bayi Rd, Xuchang 461000, Henan, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Xiaozheng,Hu, Mingming. Capillary forces between particles: role of biochar in improving water retention capacity of soil[J]. ARABIAN JOURNAL OF GEOSCIENCES,2021,14(17).
APA	Zhao, Xiaozheng,&Hu, Mingming.(2021).Capillary forces between particles: role of biochar in improving water retention capacity of soil.ARABIAN JOURNAL OF GEOSCIENCES,14(17).
MLA	Zhao, Xiaozheng,et al."Capillary forces between particles: role of biochar in improving water retention capacity of soil".ARABIAN JOURNAL OF GEOSCIENCES 14.17(2021).