Comparison of different methods to measure contact angles of soil colloids

• Published in: Journal of colloid and interface science Vol. 328; no. 2; pp. 299 - 307
• Main Authors: Shang, Jianying, Flury, Markus, Harsh, James B., Zollars, Richard L.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 15.12.2008; Elsevier
• Subjects: Chemistry; Chemistry, Physical - methods; Clay; Colloidal state and disperse state; Colloids; Colloids - chemistry; Contact angle; Exact sciences and technology; General and physical chemistry; Porosity; Porous materials; Sessile drop; Silicates; Soil; Surface physical chemistry; Surface Properties; Thin-layer wicking; Wilhelmy plate; Clay; Thin-layer wicking; Colloids; Sessile drop; Contact angle; Silicates; Wilhelmy plate; Water; Iron oxide; Film; Illite; Glass; Aluminosilicates; Laboratory; Porous material; Dynamic method; Thin film; Polar liquid; Dynamics; Sessile; Kaolinite; Goethite; Hematite; Transition element compounds; Sediments; Colloid; Drop; Soils; Pore; Smectite; Sessile drop method

We compared five different methods, static sessile drop, dynamic sessile drop, Wilhelmy plate, thin-layer wicking, and column wicking, to determine the contact angle of colloids typical for soils and sediments. The colloids (smectite, kaolinite, illite, goethite, hematite) were chosen to represent 1...