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

Tang, Ying; Li, Hang; Liu, Xinmin; Zhu, Hongmin; Tian, Rui

doi:10.1016/j.jes.2014.12.011

Cited by 26 publications

(14 citation statements)

References 43 publications

(46 reference statements)

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“…Both soil types contained aluminosilicates consisting of SiO 2 silicon–oxygen tetrahedra and Al 2 O 3 octahedra (Tang et al ., ); therefore, we consider that the van der Waals force and hydration force are approximately the same for the two soils, and thus the associated pressures (calculated from Equations and ), when added to the electrostatic repulsive pressure, provide the distributions of net pressure between two adjacent particles under different electrolyte concentrations for the each soil (Figure ).…”

Section: Resultsmentioning

confidence: 99%

Effects of DLVO, hydration and osmotic forces among soil particles on water infiltration

Luo

Ding

et al. 2018

European J Soil Science

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Summary Soil water infiltration is closely associated with the transport of nutrients and contaminants in soil. The physical mechanism by which electrolyte concentration influences water infiltration is not clear, however. Recent studies have shown that interaction forces between soil particles play a crucial role in the stability of soil aggregates and pores, which further affects soil water infiltration. In this research, column experiments were used to elucidate the effects of soil particle interaction forces on water infiltration in a permanently charged and a variably charged soil using different concentrations of KNO3 solutions (0.0001, 0.001, 0.01 and 0.1 mol l−1), and some interesting results on soil water infiltration were discovered. They indicated that: (i) four forces in soil (long‐range van der Waals attractive, electrostatic repulsive, hydration and osmotic repulsive forces) co‐determined the rate of soil water infiltration for both soil types tested, (ii) at smaller soil water content (large electrolyte concentration) the osmotic repulsive force became more important in soil water infiltration, and yet with a larger water content (small electrolyte concentration) the electrostatic repulsive force became more important, and (iii) the osmotic force affected water infiltration through its effect on particle interaction forces rather than its influence on the osmotic potential of water. This paper presents a quantitative description of how particle interaction forces affect water infiltration into soil. Highlights Elucidation of physical mechanisms of effects of clay charge and electrolyte concentration on soil water infiltration. Quantified effects of interaction forces of soil particles on soil water infiltration. Electrostatic repulsive and osmotic forces play a critical role in water infiltration. DLVO, hydration and osmotic forces among soil particles co‐determined soil water infiltration rate.

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Section: Resultsmentioning

confidence: 99%

Effects of DLVO, hydration and osmotic forces among soil particles on water infiltration

Luo

Ding

et al. 2018

European J Soil Science

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“…the aggregation of separate particles). Let us bear in mind that particles with diameters of < 1 μm contribute 76.1% of the surface charges and 71.6% of the surface area of the soil used in our study (Tang et al ., ). Therefore, these results might differ from those for soils that contain mainly coarse particles, but they may be applicable generally to clay‐rich soil.…”

Section: Discussionmentioning

confidence: 97%

“…Soil particles of < 10‐μm diameter accounted for 63.7% of the total soil mass and those < 1 μm accounted for 57%. Particles < 1‐μm diameter contributed to 76.1% of surface charges and 71.6% of surface area of the soil (Tang et al ., ).…”

Section: Methodsmentioning

confidence: 97%

Effect of soil particle interaction forces in a clay‐rich soil on aggregate breakdown and particle aggregation

et al. 2018

European J Soil Science

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Summary Particle aggregation and aggregate breakdown are important processes that frequently occur in soil under natural conditions. However, how these two opposing processes are affected by the forces that govern soil particle interaction remains unclear. Thus, in this research, we aimed to: (i) investigate the relation between particle aggregation and aggregate breakdown and (ii) probe the mechanism underlying particle aggregation and aggregate breakdown under the influences of soil particle interaction forces. Specifically, we investigated particle aggregation and aggregate breakdown in a permanently charged clay‐rich soil in solutions with different electrolyte (NaNO3 and Mg(NO3)2) concentrations. We used the fast wetting method in aggregate breakdown experiments and the dynamic light‐scattering method in aggregation experiments. For soils in either NaNO3 or Mg(NO3)2 solution, the critical coagulation concentration obtained through particle aggregation experiments was equal to the critical breakdown concentration from aggregate breakdown experiments. This result indicated that the net force, which is defined as the sum of the van der Waals, electrostatic and surface hydration forces, is attractive for aggregation but is repulsive for aggregate breakdown. Although several interaction forces were involved in soil particle interactions, we found that the repulsive electrostatic force solely determines whether the net force is attractive or repulsive and thus determines whether aggregation or breakdown would occur. For a given soil, non‐classical cationic polarization in cation–surface interactions strongly influenced the repulsive electrostatic potential energy of soil particles, thus influencing the occurrence of aggregation or breakdown. Our results suggested that adjusting soil internal forces is a feasible approach to regulate particle aggregation and promote aggregate stability. Highlights The process of soil aggregate breakdown and particle aggregation were evaluated quantitatively. There was equality in the opposing forces for particle aggregation and aggregate breakdown. Electrostatic repulsive force between soil particles controlled processes of aggregation and aggregate breakdown Cationic non‐classic polarization in cation–surface interactions has an important effect on aggregation and aggregate breakdown.

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“…Therefore, the contents of fine colloids have been observed to be variable in the paddy soils derived from different upland soils (Chen et al., 2011; Jiang et al., 2017; Z. P. Li et al., 2005; Z. Zhao et al., 2019). On the other hand, soil surface charge is mainly determined by the fine colloids, due to their relatively large specific surface area and the high density of their reactive surface sites (Y. Tang et al., 2015). In contrast to the numerous studies on the surface properties of bulk Anthrosols and their corresponding parental, upland soils, particularly the content of fine colloidal fractions (Nguyen et al., 2009), few reports have been published comparing the surface properties of specific‐sized particles from upland soils and Anthrosols, the particle size distributions (PSD) of which are more susceptible to variation.…”

Section: Introductionmentioning

confidence: 99%

“…Recent investigations have also shown that the surface electrochemical properties of soil particles change markedly as their particle size decreases to the nanoscale (W. Li et al., 2012; Qafoku, 2010; Y. Tang et al., 2015). In addition, the phenomenon of flocculation, caused by interactions among soil particles, is the first step necessary for the formation of soil structure.…”

Section: Introductionmentioning

confidence: 99%

Effect of paddy cultivation on the surface electrochemical properties of different‐sized particles of a Gleysol

Hong

Bish

Chang

et al. 2021

J. Plant Nutr. Soil Sci.

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Background Limited information is available on the changes in surface electrochemical properties of different‐sized particles of an Anthrosol, compared with the corresponding parental upland soil. Aims Our overarching goal was to clarify the contribution of different‐sized particles to the soil surface charge. The specific objectives of this work were to examine the differences in the surface charge properties between the Anthrosol and its upland parental Gleysol and to reveal the properties of the different‐sized fractions separated from the Anthrosol, compared with those of the upland Gleysol. Materials and methods The properties (e.g., negative surface charge, zeta potential, and particle sedimentation) of different‐sized fractions of nanoparticle (NP), coarse colloid, silt, and sand fractions separated from an upland Gleysol and its derived Anthrosol were compared. Results NPs in both the Anthrosol and the Gleysol carried more negative charge than did the coarse colloids, with cation exchange capacities (CEC) being 186.5% and 58.8% greater, respectively. On the other hand, the presence of more positively charged Fe/Al (hydr)oxides compensated for the negative charge, resulted in a zeta potential of the NPs similar to that of the coarse colloids. More secondary minerals were observed in the coarse colloids of the Anthrosol than in the same fraction of the Gleysol, resulting in more negative charge on the surface of the Anthrosol coarse colloids. The coarse colloid fraction of the Anthrosol, therefore, had a greater CEC, despite representing a smaller mass fraction than in the Gleysol. Overall, the CEC of the Anthrosol was 21% lower than that of the parent Gleysol, which was consistent with the findings of the surface charge, using the cesium (Cs+)‐adsorption method. The sedimentation observations demonstrated that the suspension stability of the NPs was higher than that of the coarse colloids, and that they tended to disperse particularly under high pH conditions. Conclusions Although the surface charge potential of the Anthrosol was lower than that of the upland Gleysol, the accumulation of organic matter and formation of secondary phyllosilicates resulted in maintenance of the nutrient‐ and pollutant‐binding capacity and agricultural productivity of the Anthrosol.

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

Cited by 26 publications

References 43 publications

Effects of DLVO, hydration and osmotic forces among soil particles on water infiltration

Effects of DLVO, hydration and osmotic forces among soil particles on water infiltration

Effect of soil particle interaction forces in a clay‐rich soil on aggregate breakdown and particle aggregation

Effect of paddy cultivation on the surface electrochemical properties of different‐sized particles of a Gleysol

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