Assessment of spring waters from Lourdes (France) by contact angle method
| Autor: | Dariusz Dobrzyński, Nicola Realdon, Sergio Rossi, Alessandro Dolmella, Davide Rossi |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Surface tensiometry General Physics and Astronomy Mineralogy 02 engineering and technology 010402 general chemistry 01 natural sciences Surface tension Contact angle Spring (hydrology) Karst spring Groundwater Chemical composition geography geography.geographical_feature_category Surface free energy Surfaces and Interfaces General Chemistry Solid–liquid interface 021001 nanoscience & nanotechnology Condensed Matter Physics Surface energy 0104 chemical sciences Surfaces Coatings and Films Volume (thermodynamics) Wettability Wetting 0210 nano-technology |
| Zdroj: | Surfaces and Interfaces. 19:100471 |
| ISSN: | 2468-0230 |
| DOI: | 10.1016/j.surfin.2020.100471 |
| Popis: | The geochemical investigations on karst spring waters in the area of Lourdes showed differences between the waters for numerous components, including main solutes and trace elements. In this study, a multidisciplinary approach was proposed, based on the surface free energy of solids and the surface tension of liquids using the contact angle method, by raising the hypothesis that different spring waters diverge in surface tension characteristics, which allow to discriminate waters origin in a natural system. Surface energy characteristics of spring waters from Batsurguere Valley were investigated here using the contact angle measured over time and the tangent method in relation to the variations of the droplet volume. Wettability of various test solids was analyzed using static and kinetic contact angle methods which led to the individuation of the spring waters on the base of the different adhesion processes occurring at the interface between water and solid, particularly on the silica glass solid. The analyses demonstrated that the surface tensiometry technique can discriminate one of such spring waters (i.e. the Massabielle spring) from other studied spring waters, regardless of their natural hydrological conditions. Contact angle hysteresis in kinetic modality, based on several repeated and extemporary set of experiment determinations, suggested a link between the water chemistry and the wettability over time of the test solids, confirming that chemical composition has an influence on the surface tension of spring waters. This investigation demonstrates that the surface tensiometry approach may represent a useful tool for monitoring quality of natural waters. |
| Databáze: | OpenAIRE |
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