Measurement of ion transport in soils by a radioabsorption method

• Published in: Colloids and surfaces Vol. 54; no. 1-2; pp. 61 - 74
• Main Author: VARRO, T
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 1991; Elsevier
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; Ion-exchange; Surface physical chemistry; Clay; Montmorillonite; Ion transport; Experimental study; Alkaline earth metal Ions; Transition metal Ions; Bentonite; Alkali metal Ions; Ion exchanger; Diffusion coefficient; Ion exchange; Thermodynamic properties; Activation energy
• ISSN: 0166-6622; 1873-4340
• DOI: 10.1016/0166-6622(91)80049-T

The transport of ions was investigated in industrial bentonites, montmorillonites, in soils of different nature and in soils of original structure using radioactive isotopes by a radioabsorption method. The effective diffusion coefficient and activation energy characteristic of the transport process were determined. The radioabsorption method sensitively follows the micromigration of radioactive ions in soils; it is rapid, applicable to the determination of diffusion coefficients in a wide range (10 −18-10 −9 m 2 s −1), gives results with good reproducibility (Sd 30%) and makes possible the comprehensive investigation of factors influencing transport processes in soils.