Contact angles of wetting and water stability of soil structure

Холодов, В. А.; Yaroslavtseva, N. V.; Yashin, M. A.; Фрид, А. С.; Lazarev, V. I.; Tyugai, Z.; Milanovskiy, Evgeny

doi:10.1134/s106422931506006x

Cited by 17 publications

(7 citation statements)

References 26 publications

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“…The drying-wetting cycle was always followed by the pooling and separation of the soil aggregate into various size classes (Kholodov, 2013). A wetting method is an approach used in detecting the resistance capacity of a macroaggregate structure to water strength (Kholodov et al, 2015). Under the wet conditions, the aggregate was formed and distributed into five aggregate size classes (Figure 2).…”

Section: Discussionmentioning

confidence: 99%

Quality of soil from the nickel mining area of Southeast Sulawesi, Indonesia, engineered using earthworms (Pheretima sp.)

Syaf

Pattah

Kilowasid

2021

J.Degrade.Min.Land Manage.

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Earthworms (Pheretima sp.) could survive under abiotic stress soil conditions. Furthermore, their activities as ecosystem engineers allow for the creation of soil biostructures with new characteristics. Therefore, this study aimed to investigate the effect of the abundance of Pheretima sp. on the aggregate size, physicochemistry, and biology of the topsoil from the nickel mining area of Southeast Sulawesi, Indonesia. It was carried out by first grouping their abundance into zero, two, four, six, and eight individuals per pot and then carrying out tests. The Pheretima sp. were then released onto the surface of the topsoil and mixed with biochar that was saturated with tap water in the pot overnight. The results showed that the abundance of the species had a significant effect on the size class distribution, and aggregate stability of the soil. Furthermore, the size of the soil aggregates formed was dominated by the size class 2.83 - 4.75 mm under both dry and wet conditions. Under dry conditions, three size classes were found, while under wet conditions, there were five size classes. The results also showed that the highest and lowest stability indexes occurred with zero and eight Pheretima sp., respectively. Furthermore, the abundance had a significant effect on pH, organic C, total N, CEC, and total nematodes. However, it had no significant effect on the total P, C/N ratio, total AMF spores, and flagellate. The highest soil pH occurred with zero Pheretima sp., while with six and two members of the species, the total nematode was at its highest and lowest populations, respectively. Therefore, it could be concluded that the species was able to create novel conditions in the topsoils at the nickel mining area that were suitable for various soil biota.

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Section: Discussionmentioning

confidence: 99%

Quality of soil from the nickel mining area of Southeast Sulawesi, Indonesia, engineered using earthworms (Pheretima sp.)

Syaf

Pattah

Kilowasid

2021

J.Degrade.Min.Land Manage.

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“…Wetting and dewetting are fundamental processes in many applications, including inkjet printing 1 , coating 2 , lubrication 3,4 , and soil science 5,6 . These applications usually involve dynamic conditions, e.g., drop impingement on substrates 7 , requiring further consideration of the rate effects among multiple phases, i.e., gas, liquid and solid.…”

Section: Introductionmentioning

confidence: 99%

Dynamic contact angle hysteresis in liquid bridges

Shi

Zhang

Liu

et al. 2018

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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This work presents a combined experimental and theoretical study of dynamic contact angle hysteresis using liquid bridges under cyclic compression and stretching between two identical plates. Under various loading rates, contact angle hysteresis for three different liquids was measured by examination of advancing and receding angles in liquid bridges, and the capillary forces were recorded. It is found that, for a given liquid, the hysteretic phenomenon of the contact angle is more pronounced at higher loading rates. By unifying the behaviour of the three liquids, power-law correlations were proposed to describe the relationship between the dynamic contact angle and the capillary number for advancing and receding cases. It is found that the exponents of obtained power-law correlations differ from those derived through earlier methods (e.g., capillary rise), due to the different kinematics of the triple-line. The various hysteretic loops of capillary force in liquid bridges under varied cyclic loading rates were also observed, which can be captured quantitatively by the prediction of our developed model incorporating the dynamic contact angle hysteresis. These results illustrate the importance of varying triple-line geometries during dynamic wetting and dewetting processes, and warrant an improved modelling approach for higher level phenomena involving these processes, e.g., multiphase flow in porous media and liquid transfer between surfaces with moving contact lines.

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“…Adjacent to the Kund, there is a dug well, in which the water level is 5.59 meters below to the ground level having a water column thickness of 8.26. According to Capillary Height Formula/Jurin's law (Kholodov et al, 2015)…”

Section: Hydrogeological Methodsmentioning

confidence: 99%

Determination of silt thickness in Durga Kund for its de-isolation at Varanasi U.P. India

Singh

Mishra

2020

Water Science

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In this study, we are focused on the re-connection of Kund to the water table. Kunds are the best ancient architectural construction that was connected to the underground water table and works upon the principle of the Capillary action. But due to the dumping of the sacristy in the Kund, they have been disconnected from the subsurface water source/water table. For the rejuvenation of the Kunds, it should be cleaned through which they could again connect to the water table. For the re-connection of Durga Kund to the water table, first, we have to calculate the silt thickness and cleaned it. So, in this process for the delineation of silt thickness, there are two methods, which have used. The first is based upon the hydrogeological conceptual method and the second is based upon the geophysical method. After applying both the methods, the results were almost same, the estimated thickness of silt was about 3.5 to 4 meters. Now, this result has been established that both the conceptual and practical results are same. It means in this technical time, the Conceptual results are as much reliable as instrumental results.

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Contact angles of wetting and water stability of soil structure

Cited by 17 publications

References 26 publications

Quality of soil from the nickel mining area of Southeast Sulawesi, Indonesia, engineered using earthworms (Pheretima sp.)

Quality of soil from the nickel mining area of Southeast Sulawesi, Indonesia, engineered using earthworms (Pheretima sp.)

Dynamic contact angle hysteresis in liquid bridges

Determination of silt thickness in Durga Kund for its de-isolation at Varanasi U.P. India

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