Characterizing Aggregate Pore Structure by X-Ray Micro-Computed Tomography and a Network Model

被引:13
作者
Yu, Xiuling [1 ]
Peng, Guanyun [2 ]
Lu, Shenggao [1 ]
机构
[1] Zhejiang Univ, Coll Environm & Resource Sci, Prov Key Lab Subtrop Soil & Plant Nutr, 866 Yuhangtang Rd, Hangzhou 310058, Zhejiang, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Xray Imaging & Biomed Applicat Beamline, Shanghai 201204, Peoples R China
基金
中国国家自然科学基金;
关键词
SOIL ORGANIC-MATTER; DIFFERENTLY TEXTURED SOILS; UNSATURATED POROUS-MEDIA; INTACT SOILS; CARBON; MICROTOMOGRAPHY; MANAGEMENT; TRANSPORT; TURNOVER; SPACE;
D O I
10.2136/sssaj2017.11.0385
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
Information about the influence of intra-aggregate pore structure on functions and properties of soil aggregates is not fully available or predictable. In this study, the microscale intra-aggregate pore structure of four soils (Mollisol, Alfisol, Ultisol, and Vertisol) was studied by a synergistic use of synchrotron-based X-ray micro-computed tomography (SR-mCT) and advanced analytical data methods. Detailed characteristics of the connected and isolated pores of four soils were investigated by a pore network model, a network analysis, and a pore map analysis, respectively. Results indicated that total porosity and the connected/isolated porosity ratio (C/I) could describe the possible function of the soil aggregates. The aggregates with larger total porosity and C/I ratio (such as Mollisol and Alfisol) tend to have better air, water, and nutrient exchangeability as well as balance of water retention and physical C protection; whereas the aggregates with smaller total porosity and C/I ratio (such as Ultisol and Vertisol) tend to reduce air and weer exchange but have relatively better water retention ability. The pore map analysis revealed the spatial variations of isolated pores within the aggregates and depending on soil types, may influence greatly water retention and C physical protection in aggregates. The pore network model and the network analysis revealed that Ultisol and Vertisol have a smaller average throat area, an average channel length, a larger network diameter, and an average path length, which could have limited the exchangeability of air, water, and nutrient. Our results indicated that the total porosity and the C/I ratio were effective proxy indicators, which could be used to predict the functions and properties of an aggregate.
引用
收藏
页码:744 / 756
页数:13
相关论文
共 50 条
[41]   Morphological Analysis of Spherical Adsorptive Carbon Granules Using Three-Dimensional X-Ray Micro-computed Tomography [J].
Lzutsu, Ken-ichi ;
Abe, Yasuhiro ;
Yomota, Chikako ;
Yoshid, Hiroyuki .
CHEMICAL & PHARMACEUTICAL BULLETIN, 2020, 68 (02) :179-180
[42]   A Review of Current Challenges and Case Study toward Optimizing Micro-Computed X-Ray Tomography of Carbon Fabric Composites [J].
Rashidi, Armin ;
Olfatbakhsh, Tina ;
Crawford, Bryn ;
Milani, Abbas S. .
MATERIALS, 2020, 13 (16)
[43]   Investigation of supercritical CO2 mass transfer in porous media using X-ray micro-computed tomography [J].
Huang, Ruotong ;
Herring, Anna L. ;
Sheppard, Adrian .
ADVANCES IN WATER RESOURCES, 2023, 171
[44]   Nondestructive material characterization of meteorites with synchrotron-based high energy x-ray phase micro-computed tomography [J].
Liu, Huiqiang ;
Xiao, Tiqiao ;
Xie, Honglan ;
Fu, Yanan ;
Zhang, Xueliang ;
Fan, Xiaoxi .
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2017, 50 (05)
[45]   CRYSTAL SURFACE REACTIVITY ANALYSIS USING A COMBINED APPROACH OF X-RAY MICRO-COMPUTED TOMOGRAPHY AND VERTICAL SCANNING INTERFEROMETRY [J].
Kahl, Wolf-Achim ;
Yuan, Tao ;
Bollermann, Till ;
Bach, Wolfgang ;
Fischer, Cornelius .
AMERICAN JOURNAL OF SCIENCE, 2020, 320 (01) :27-52
[46]   Three-dimensional pore structure visualization and characterization of paper using X-ray computed tomography [J].
Defrenne, Yves ;
Zhdankin, Vasili ;
Ramanna, Sahana ;
Ramaswamy, Shri ;
Ramarao, Bandaru V. .
TAPPI JOURNAL, 2017, 16 (09) :519-530
[47]   Permafrost pore structure and its influence on microbial diversity: Insights from X-ray computed tomography [J].
Blais, Nathan D. ;
O'Brien, Joy M. ;
Holland-Moritz, Hannah ;
Farnsworth, Lauren ;
Barbato, Robyn A. ;
Douglas, Thomas A. ;
Contosta, Alexandra ;
Bobyock, Julie ;
Rooney, Erin C. ;
Sullivan, Taylor ;
Ernakovich, Jessica Gilman .
GEODERMA, 2025, 454
[48]   A multifunctional mechanical testing stage for micro x-ray computed tomography [J].
Ruf, Matthias ;
Lee, Dongwon ;
Steeb, Holger .
REVIEW OF SCIENTIFIC INSTRUMENTS, 2023, 94 (08)
[49]   Three-dimensional reconstruction of maize roots and quantitative analysis of metaxylem vessels based on X-ray micro-computed tomography [J].
Pan, Xiaodi ;
Ma, Liming ;
Zhang, Ying ;
Wang, Jinglu ;
Du, Jianjun ;
Guo, Xinyu .
CANADIAN JOURNAL OF PLANT SCIENCE, 2018, 98 (02) :457-466
[50]   Overcoming stereological Bias: A workflow for 3D mineral characterization of particles using X-ray micro-computed tomography [J].
Siddique, Asim ;
Godinho, Jose R. A. ;
Sittner, Jonathan ;
Pereira, Lucas .
MINERALS ENGINEERING, 2023, 201