THE METHOD OF PREPARING SOIL SAMPLES FOR SOIL – WATER CONTACT ANGLE MEASUREMENT USING SESSILE-DROP TECHNIQUE
https://doi.org/10.19047/0136-1694-2019-97-91-112
Abstract
The method of soil samples preparation for measuring the (wetting) contact angle (CA) of the soil solid phase surface using membrane filters is proposed. The samples of kaolinite, a standard sample of chernozem and samples of agro-chestnut soil were taken for the experiment. The results of the CA measurements using two types of sample preparation for the analysis were compared. The first method of sample preparation was to apply a sample to a double-sided adhesive tape; the second method involved the deposition of suspensions of the studied samples of certain concentrations on membrane filters. The advantages and disadvantages of each sample preparation method are described. The significant difference in the obtained CA values depending on the sample preparation for measurement was revealed. The method of sample preparation with the use of membrane filters developed by the authors made it possible to reduce the CA measurement error by more than 2 times. Reducing the variation of the CA value of a single sample will allow comparing similar soil samples, including soils of the same type, but involved in different land use systems.
About the Authors
N. V. Matveeva
V.V. Dokuchaev Soil Science Institute; Lomonosov Moscow State University
Russian Federation
Russian Federation
119017, Moscow, Pizhevskiy per., 7, build. 2; 119991, Moscow, Leninskie Gory, 1.
E. Yu. Milanovsky
V.V. Dokuchaev Soil Science Institute; Lomonosov Moscow State University
Russian Federation
Russian Federation
119017, Moscow, Pizhevskiy per., 7, build. 2; 119991, Moscow, Leninskie Gory, 1.
O. B. Rogova
V.V. Dokuchaev Soil Science Institute
Russian Federation
Russian Federation
119017, Moscow, Pizhevskiy per., 7, build. 2.
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Review
For citations:
Matveeva N.V., Milanovsky E.Yu., Rogova O.B. THE METHOD OF PREPARING SOIL SAMPLES FOR SOIL – WATER CONTACT ANGLE MEASUREMENT USING SESSILE-DROP TECHNIQUE. Dokuchaev Soil Bulletin. 2019;(97):91-112. https://doi.org/10.19047/0136-1694-2019-97-91-112
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