Particle Interaction Forces Induce Soil Particle Transport during Rainfall

Song, Li; Li, Hang; Xu, Chenyang; Huang, Xueru; Xie, Deti; Ni, Jiupai

doi:10.2136/sssaj2013.01.0009

Cited by 92 publications

(83 citation statements)

References 30 publications

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“…According to the electric double layer theory, 22,34 we calculated the surface electric¯eld strength and ion distribution in the electric double layer of soil colloidal particles.…”

Section: Resultsmentioning

confidence: 99%

“…Li and Hu et al 21,22 showed that the ion-particle interactions include electrostatic repulsion, van der Waals attraction, and hydration repulsion. These forces can be calculated using Eqs.…”

Section: Comparative Analysis Of Nonclassicalmentioning

confidence: 99%

“…(4) 22,35,36 : Table 2. Surface potentials of the purple soil for Na þ and K þ at di®erent electrolyte concentrations (considering the e®ect of nonclassical polarization).…”

Section: Comparative Analysis Of Nonclassicalmentioning

confidence: 99%

“…It is worth mentioning that although the concentration of Ca 2þ and Mg 2þ may be higher than the concentration of K þ and Na þ in nature soil system, the e®ects of nonclassical polarization of monovalent counterions on the stability of soil colloid particles in the present study, but the Coulomb e®ects is very strong and may cover up the e®ects of nonclassical polarization for the bivalent counterions, thus we selected the Na þ and K þ . [20][21][22][23] The interactions between Na þ or K þ and purple soil particles were calculated theoretically. The critical coagulation concentration (CCC) and critical particle diameter for the aggregation of purple soil colloids were obtained by dynamic light scattering.…”

Section: Introductionmentioning

confidence: 99%

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EFFECT OF NONCLASSICAL POLARIZATION OF Na+ AND K+ ON THE STABILITY OF SOIL COLLOIDAL PARTICLES IN SUSPENSION

Ding

Wang

et al. 2017

Surf. Rev. Lett.

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The study of soil colloids is essential because the stability of soil colloidal particles are important processes of interest to researchers in environmental¯elds. The strong nonclassical polarization of the adsorbed cations (Na þ and K þ Þ decreased the electric¯eld and the electrostatic repulsion between adjacent colloidal particles. The decrease of the absolute values of surface potential was greater for K þ than for Na þ . The lower the concentration of Na þ and K þ in soil colloids, the greater the electrostatic repulsion between adjacent colloidal particles. The net pressure and the electrostatic repulsion was greater for Na þ than for K þ at the same ion concentration. For K þ and Na þ concentrations higher than 50 mmol L À1 or 100 mmol L À1 , there was a net negative (or attractive) pressure between two adjacent soil particles. The increasing total average aggregation (TAA) rate of soil colloids with increasing Na þ and K þ concentrations exhibited two stages: the growth rates of TAA increased rapidly at¯rst and then increased slowly and eventually almost negligibly. The critical coagulation concentrations of soil colloids in Na þ and K þ were 91.6 mmol L À1 and 47.8 mmol L À1 , respectively, and these were similar to the concentrations at the net negative pressure.

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“…According to the electric double layer theory, 22,34 we calculated the surface electric¯eld strength and ion distribution in the electric double layer of soil colloidal particles.…”

Section: Resultsmentioning

confidence: 99%

Section: Comparative Analysis Of Nonclassicalmentioning

confidence: 99%

“…(4) 22,35,36 : Table 2. Surface potentials of the purple soil for Na þ and K þ at di®erent electrolyte concentrations (considering the e®ect of nonclassical polarization).…”

Section: Comparative Analysis Of Nonclassicalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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EFFECT OF NONCLASSICAL POLARIZATION OF Na+ AND K+ ON THE STABILITY OF SOIL COLLOIDAL PARTICLES IN SUSPENSION

Ding

Wang

et al. 2017

Surf. Rev. Lett.

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“…Hu et al (2015) have quantitatively analyzed how the electrostatic repulsive pressure between clay particles of the same purple soil in our study influenced soil aggregate breakdown, and found that, after aggregate breakdown, the small particles released (separate and micro-aggregates) with a diameter < 2 μm exponentially increased with the increase of electrostatic repulsive pressure, indicating that the surface properties of clay particles strongly influence soil aggregate stability. Moreover, Li et al (2013) further studied the relationship between transport ability of soil particles during rainfall and the surface potential of soil particles for the same purple soil in this study. They found that, with the increase of surface potential, the intensity of particle transport during rainfall sharply increased, implying that the electrostatic repulsive pressure determined the intensity of soil transport in natural systems.…”

Section: Assessment Of Electrostatic Repulsive Pressure Between Adjacmentioning

confidence: 99%

Unraveling the size distributions of surface properties for purple soil and yellow soil

Tang

Liu

et al. 2015

Journal of Environmental Sciences

Self Cite

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Soils contain diverse colloidal particles whose properties are pertinent to ecological and human health, whereas few investigations systematically analyze the surface properties of these particles. The objective of this study was to elucidate the surface properties of particles within targeted size ranges (i.e. > 10, 1-10, 0.5-1, 0.2-0.5 and <0.2 μm) for a purple soil (Entisol) and a yellow soil (Ultisol) using the combined determination method. The mineralogy of corresponding particle-size fractions was determined by X-ray diffraction.We found that up to 80% of the specific surface area and 85% of the surface charge of the entire soil came from colloidal-sized particles (< 1 μm), and almost half of the specific surface area and surface charge came from the smallest particles (< 0.2 μm). Vermiculite, illite, montmorillonite and mica dominated in the colloidal-sized particles, of which the smallest particles had the highest proportion of vermiculite and montmorillonite. For a given size fraction, the purple soil had a larger specific surface area, stronger electrostatic field, and higher surface charge than the yellow soil due to differences in mineralogy.Likewise, the differences in surface properties among the various particle-size fractions can also be ascribed to mineralogy. Our results indicated that soil surface properties were essentially determined by the colloidal-sized particles, and the < 0.2 μm nanoparticles made the largest contribution to soil properties. The composition of clay minerals within the diverse particle-size fractions could fully explain the size distributions of surface properties.

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Varied root effects on soil detachment with growth time and hydrodynamic characteristics

Liu,

Zhou,

Chen

et al. 2024

Earth Surf Processes Landf

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Plant roots significantly reduce soil detachment by overland flow. However, there have been few studies on how plant growth time and hydrodynamic characteristics affect the erosion‐reducing potential of plant roots. This study cultivated ryegrass (Lolium perenne L.) and alfalfa (Medicago sativa L.) as representative of plants possessing fibrous roots and taproots, respectively, in silty soil from the Loess Plateau, China. Root‐soil composites were collected monthly from March to September 2021 and subjected to flow scouring in a hydraulic flume at a 15° slope using five different flow discharges (0.05, 0.1, 0.15, 0.2 and 0.3 L s−1). The results of the study indicated that root length density, root surface area density and root mass density exhibited a significant increase during the early growth phase, followed by a slight decrease. All parameters of fibrous roots revealed greater values than those of taproots, except for root mass density. The reduction in soil detachment under varying flow shear stresses showed a significant increase during the early phases of growth, followed by a gradual decline. Notably, fibrous roots demonstrated a greater impact on soil detachment than taproots, and this discrepancy fluctuated over time. Moreover, the contributions of fibrous and taproots to reducing soil detachment decreased from 55.81% to 39.66% and from 38.21% to 20.99% with increasing flow shear stress, respectively. It indicated that the erosion‐reducing potential of plant roots was greater when subjected to low‐flow shear stress compared to high‐flow shear stress. This study can provide a scientific basis for understanding the erosion‐reducing potential of plant roots at different growing stages and under varying hydrodynamic characteristics.

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Particle Interaction Forces Induce Soil Particle Transport during Rainfall

Cited by 92 publications

References 30 publications

EFFECT OF NONCLASSICAL POLARIZATION OF Na+ AND K+ ON THE STABILITY OF SOIL COLLOIDAL PARTICLES IN SUSPENSION

EFFECT OF NONCLASSICAL POLARIZATION OF Na+ AND K+ ON THE STABILITY OF SOIL COLLOIDAL PARTICLES IN SUSPENSION

Unraveling the size distributions of surface properties for purple soil and yellow soil

Varied root effects on soil detachment with growth time and hydrodynamic characteristics

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