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Wyszukujesz frazę "soil wettability" wg kryterium: Wszystkie pola

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    Tytuł:
    Effect of solid phase wettability on water transport and retention in peat enriched soil affected by freezing-thawing
    Autorzy:
    Hajnos, M.
    Bowanko, G.
    Jozefaciuk, G.
    Glowacki, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/26449.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    freezing
    soil wettability
    soil
    wettability
    thawing
    water retention
    peat
    Źródło:
    International Agrophysics; 2002, 16, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energia powierzchniowa i wielkosci jej skladowych jako parametry okreslajace zwilzalnosc i stan agregacyjny wybranych mineralow ilastych i gleb
    Surface energy and its components as parameters determining wettability and aggregation state of selected clay minerals and soils.
    Autorzy:
    Hajnos, M
    Powiązania:
    https://bibliotekanauki.pl/articles/1630383.pdf
    Data publikacji:
    1999
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    agrofizyka
    gleby
    gleby organiczne
    gleby mineralne
    mineraly ilaste
    prochnica
    prochnica lesna
    kwasy huminowe
    struktura gleb
    zwilzalnosc
    zwilzalnosc gleb
    powierzchnia gleb
    agregaty glebowe
    energia powierzchniowa
    soil
    organic soil
    mineral soil
    clay mineral
    humus
    forest humus
    humic acid
    soil structure
    wettability
    soil wettability
    soil surface
    soil aggregate
    surface free energy
    Opis:
    In the present work problems related to surface free energy of different agricultural materials such as clay minerals, mineral soils, organic soils and forest litter were considered. Methodical investigations of surface free energy determination as well as fundamental investigations connected with the influence of the surface cations and organic substance on the wettability, free energy and interaction forces between clay minerals and soil particles were undertaken. The interaction forces between clay minerals and soil particles perform a fundamental role in aggregation, flocculation and forming of solids structure. In case of solids the surface free energy can be determined indirectly for example from the measured contact angles or from the adsorption values (by determination of film pressure jt) with appropriate theoretical assumptions. Such methods were applied in this paper to determine surface free energy components for clay minerals and soils. Because of difficulties in contact angle measurements by sessile drop method (especially for organic soils and humus) thin layer wicking or thin column wicking technique were applied. The investigations of penetration rates of water and organic liquids carried out for clay minerals and their mono ionic forms showed the close dependence between the kind of mineral and surface cation. The linear dependence of penetration rates was obtained at the lowest penetration times for bentonite and the highest for kaolin. The kind and properties (e.g. radius of hydrated ions) play in this case an important role. The empiric series of wettability, depending on clay mineral and surface cation were determined experimentally. Similar measurements were performed for clay minerals with increasing additions of humic acid and for different soils. On the basis of the measurements the surface free energy components apolar and polar (electron-acceptor and electron-donor) were calculated and correlated with the kind of clay mineral, surface cation and humic acid content. The investigations for soils show that the penetration times depend on the soil samples. Contact angle values for investigated samples were also calculated. From the water vapour adsorption measurements on the surfaces of modified clay minerals and soils the water film pressure values were calculated for one or three monolayers and compared with the work of adhesion and immersion. For soil materials surface free energy had real influence on structure formation or its changes. The organic matter and surface cations had an important role in creation of soil structure.
    Źródło:
    Acta Agrophysica; 1999, 17; 1-112
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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