esoilБюллетень Почвенного института имени В.В. ДокучаеваDokuchaev Soil Bulletin0136-16942312-4202V.V. Dokuchaev Soil Science Institute10.19047/0136-1694-2019-97-91-112esoil-330Research ArticleСтатьиСПОСОБ ПОДГОТОВКИ ОБРАЗЦОВ ПОЧВ ДЛЯ ОПРЕДЕЛЕНИЯ КОНТАКТНОГО УГЛА СМАЧИВАНИЯ МЕТОДОМ СИДЯЧЕЙ КАПЛИTHE METHOD OF PREPARING SOIL SAMPLES FOR SOIL – WATER CONTACT ANGLE MEASUREMENT USING SESSILE-DROP TECHNIQUEМатвееваН. В.MatveevaN. V.

119017, Москва, Пыжевский пер, 7, стр. 2; 119991, Москва, Ленинские Горы, 1.

119017, Moscow, Pizhevskiy per., 7, build. 2; 119991, Moscow, Leninskie Gory, 1.

Nataliy_Matveeva@list.ruМилановскийЕ. Ю.MilanovskyE. Yu.

119017, Москва, Пыжевский пер, 7, стр. 2; 119991, Москва, Ленинские Горы, 1.

119017, Moscow, Pizhevskiy per., 7, build. 2; 119991, Moscow, Leninskie Gory, 1.

milanovskiy@gmail.comРоговаО. Б.RogovaO. B.

119017, Москва, Пыжевский пер, 7, стр. 2.

119017, Moscow, Pizhevskiy per., 7, build. 2.

olga_rogova@inbox.ruПочвенный институт им. В.В. Докучаева; МГУ им. М.В. ЛомоносоваРоссияV.V. Dokuchaev Soil Science Institute; Lomonosov Moscow State UniversityRussian FederationПочвенный институт им. В.В. ДокучаеваРоссияV.V. Dokuchaev Soil Science InstituteRussian Federation20191806201909791112Copyright © Матвеева Н.В., Милановский Е.Ю., Рогова О.Б., 20192019Матвеева Н.В., Милановский Е.Ю., Рогова О.Б.Matveeva N.V., Milanovsky E.Y., Rogova O.B.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://bulletin.esoil.ru/jour/article/view/330

Предложена методика подготовки образцов почв для измерения контактного угла смачивания (КУ) поверхности твердой фазы почв с использованием мембранных фильтров. На образцах каолинита, стандартном образце чернозема (СП-1) и образцах агрокаштановой почвы проведено сравнение результатов определения КУ при использовании двух видов подготовки исследуемых образцов к анализу. Первый способ заключался в нанесении образца на двухстороннюю клейкую ленту; второй способ подразумевал осаждение суспензий исследуемых образцов определенных концентраций на мембранные фильтры. Описаны преимущества и недостатки каждого способа подготовки проб. Выявлено существенное различие получаемых величин КУ в зависимости от подготовки пробы к измерению. Разработанная методика пробоподготовки образцов с использованием мембранных фильтров позволила более чем в два раза уменьшить погрешность измерения определения КУ. Снижение варьирования величины КУ единичного образца позволит сравнивать близкие по свойствам почвенные образцы, в том числе почвы одного типа, но различных систем землепользования.

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.

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The authors declare that there are no conflicts of interest present.