Sorption of Uranine on forest soils

K Gerke; Roy C Sidle; Y Tokuda

doi:10.3178/HRL.2.32

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Sorption of Uranine on forest soils

K Gerke, Roy C Sidle and Y Tokuda

Hydrological Research Letters, Vol.2, pp.32-35

2008

DOI: https://doi.org/10.3178/HRL.2.32

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Abstract

Physical Geography and Environmental Geoscience

Geology

tracer

staining

adsorption isotherm

preferential flow

hydrological pathways

Staining substances have been widely used to visualize flow paths in soils, and recently dye concentrations in soil profiles are quantified using photographs. Fluorescent dye Uranine is one of the promising staining agents. The sorption properties of Uranine are needed to establish initial concentrations in applied solutions, determine Uranine mobility, and model solute transport. At least 65% of Uranine adsorption on subsoils from Okaya, Japan occurred after 1 h of shaking. Subsequently, equilibrium sorption was assessed for six different forest soil samples, including topsoil, subsoil, and a buried organic-rich layer. Adsorption in all soil samples was significantly reduced by adjusting initial solution pH to 13. Adsorption was greater in topsoil; however, it was not significantly correlated with soil organic matter. The buried organic-rich soil experienced intermediate adsorption compared to topsoil and subsoil samples. Equilibrium adsorption data for both topsoil and subsoil samples best fit the Freundlich isotherm. In subsoils, Uranine sorption was comparable to reported values for Pyranine and commonly used Brilliant Blue FCF dye, while adsorption in topsoil samples from these forests (up to 21.7% organic matter) was significantly higher than reported values for agricultural soils.

Details

Title: Sorption of Uranine on forest soils
Authors: K Gerke (Author) - Kyoto University, Japan
Roy C Sidle (Author) - Kyoto University
Y Tokuda (Author) - Kyoto University, Japan
Publication details: Hydrological Research Letters, Vol.2, pp.32-35
Publisher: Japan Society of Hydrology and Water Resources
Date published: 2008
DOI: 10.3178/HRL.2.32
ISSN: 1882-3416
Copyright note: Copyright © 2008 The Authors. The article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/).
Organisation Unit: University of the Sunshine Coast, Queensland; Sustainability Research Cluster
Language: English
Record Identifier: 99450702102621
Output Type: Journal article

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