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Updated: Aug 13, 2026

Combined Size and Density Fractionation of Soils for Investigations of Organo-Mineral Interactions
Published on: February 15, 2019
Measuring the partitioning of silver to organic carbon using solubility enhancement
Kevin J Rader1, Timothy S Shadi, John D Mahony
1Environmental Engineering Department, Manhattan College, Riverdale, New York 10471, USA.
Abstract:
Ionic silver is toxic to aquatic organisms at low concentrations. However, complexation to binding sites on natural organic matter has been shown to reduce silver toxicity. Research indicates that there is a need to develop reliable methods for characterizing silver binding at very low silver ion concentrations where strong binding sites have a significant influence on silver speciation. This study provides an analytical method for measuring silver binding using a solubility-enhancement procedure. Preliminary experimental results are provided that demonstrate strong silver binding in the presence of natural organic matter at very low silver ion concentrations.
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