Determination of the specific soil surface area from the hygroscopic water content

Moiseev, Kirill

doi:10.1134/s1064229308070089

Cited by 14 publications

(4 citation statements)

References 2 publications

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“…The results of the studies have shown that the water content of the original soil with high fertility at the water potential range from -5 to -1500 kPa varied from 24.6 to 6.6% and was significantly higher (P < 0.001) than that of the soil with medium fertility, where the water content var ied from 21.6 to 4.6% at the same range of water poten tials. These results agree with the data of other authors [5,8,15,38], who noted the higher water retention capacity of soils at the increase of their fertility and their enrichment with organic matter.…”

Section: Resultssupporting

confidence: 93%

Effect of biochar on the properties of loamy sand Spodosol soil samples with different fertility levels: A laboratory experiment

et al. 2015

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The effect of biochar on the properties of a loamy sand Spodosol with different fertility level in the ploughed horizon has been studied in a 60 day laboratory experiment. It has been found that the application of biochar resulted in a significant increase of the soil water content in the range of soil water potential from -5 to -50 kPa, a significant decrease of the total shrinkage of the soil with high level of fertility after three wetting-drying cycles, and the accumulation of a significantly higher content of nitrates in the soil. At a water content of 21%, less favorable conditions for the denitrification development were formed in the soil with high level of fertility than in the medium fertile soil, which resulted in lower cumulative N 2 O emission from the former. The addition of biochar resulted in no significant changes in the cumulative emission of CO 2 from the studied soil but significantly reduced the emission of N 2 O from the soil at the simultaneous addition of biochar and clover residues.

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Section: Resultssupporting

confidence: 93%

Effect of biochar on the properties of loamy sand Spodosol soil samples with different fertility levels: A laboratory experiment

et al. 2015

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“…Based on the information of SA and hygroscopic water contents (Gj^) of 42 soil samples, Robinson et al (2002) established a linear equation between SA and 9jt hat passed through the origin, SA (m^ g~') = 35.7 9[^ (%, by volume). Recently Moiseev (2008) summarized the previous data and proposed a general relationship between soil SA and adsorbed water content {IV, %), SA (m^ g~') = A x IV, where A is an empirical coefficient.…”

Section: Bound Water Contents As Related To Soil Surface Areamentioning

confidence: 99%

Bound Water Content of Air‐Dry Soils Measured by Thermal Analysis

Wang

Ren

et al. 2011

Soil Science Soc of Amer J

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Conventional oven-drying method may not give accurate information of bound water content in soils. The objective of this study was to determine the ftaction of soil water that is bound to soil colloids using the thetmogravimetry (TG) technique. A heating program from room temperature (RT) to 200°C was developed to partition bound water into loosely bound water (equivalent to water content determined by conventional oven-drying method) and tightly bound water that was not accounted by conventional oven-drying method on original and organic matter (OM) removed soil samples. Nine air-dry soils, with varying amounts of clay and OM contents, wete tested.For the original air-dry samples, bound water content ranged from 0.54 to 5.22%, and the fractions of loosely and tightly bound water were about 80 and 20%, respectively. On a mass fraction basis, the specific watet adsorption capacity o( soil OM was 10 to 40 times that of soil minerals. For most mineral soils, however, the contribution of soil minerals to bound water (>70%) was much larger than that of soil OM (<30%), since the mineral fraction usually dominates over the OM fraction. In a soil with high OM concentration but a relatively low clay content.OM contribution to bound water exceeded 50%. Soil specific surface area (5/i) showed a strong infiuence on bound water content, and a linear relationship between SÀ and bound water content was established.Abbreviations: DSC, difFerential scanning calorimetry; DTA, differential thermal analysis; EGD, evolved gas detection; MS, mass spectrometry; OM, organic matter; RT, room temperature; SA. specific surface area; SAR, specific adsorption ratio; TG, thermogravimetry.T he structure, energy, and properties (e.g., specific heat capacity and dielectric permittivity) of soil water vary with the distance from solid surface (Etzler, 1983; Yamaguchi, 1959). Water bounded in the first few layers is assumed to have stronger bonding energy (Panchev et al., 2005) and therefore different structure than the water in bulk (Bogdan et al., 1996;Kleinberg and Griffin, 2005). Soil water content is usually referred to the quantity of water that is evaporated from soil by heating the sample at 100 to 110°C (average 105°C) until there is no further weight loss. Some research has implied that the drying temperature of porous medium perhaps should be higher than 105°C. For example, thermo-analytical studies of water on activated alumina showed that the drying temperature for this material should be 120 to 125°C (Hampson and Bleam, 1996). Bogdan et al. (1996) measured water content of pyrogenic silica powder by drying at 200°C. Gardner et al. (2001) pointed out that heating at temperature range of 110 to 16O°C was required to remove bound water from clay surfaces. Logsdon and Laird (2004) dried clay samples at 190°C. Mitchell and Soga (2005) stated that depending on soil texture, the drying temperature for mineral soils should be in the range of 100 to 300°C. Thus it is questionable if the conventional method of oven-drying soil samples at 105...

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“…The seed of Hesperostipacomata twists and untwists, depending on its hydration level, drilling the seed into the soil. (Moiseev, 2008) Animals can also have characteristic hygroscopic properties. For example, a species of lizard commonly called the thorny dragon has hygroscopic grooves between its spines.…”

Section: Examples Of Hygroscopic Materialsmentioning

confidence: 99%

Moisture beyond Hygroscopicity- The Chemist Understanding

2023

International Journal of Science and Engineering Applications

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In this review paper, hygroscopicity was briefly analyzed within the context of the role water molecules in the air plays in causing moisture. Some material substances that absorb or adsorb water molecules from the air were highlighted, like salts, sucrose, ethanol, sulphuric acid and cellulose fibre. The chemistry origin of hygroscopy was x-rayed through an attempt to explain the polar nature of water and some hygroscopic substances and the important role of hydrogen bonding. While highlighting the disadvantages of hygroscopy in food materials and other raw materials for production.

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Determination of the specific soil surface area from the hygroscopic water content

Cited by 14 publications

References 2 publications

Effect of biochar on the properties of loamy sand Spodosol soil samples with different fertility levels: A laboratory experiment

Effect of biochar on the properties of loamy sand Spodosol soil samples with different fertility levels: A laboratory experiment

Bound Water Content of Air‐Dry Soils Measured by Thermal Analysis

Moisture beyond Hygroscopicity- The Chemist Understanding

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