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Measuring the partitioning of silver to organic carbon using solubility enhancement
Author(s) -
Rader Kevin J.,
Shadi Timothy S.,
Mahony John D.,
Di Toro Dominic M.
Publication year - 2005
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1897/04-577r.1
Subject(s) - solubility , environmental chemistry , dissolved organic carbon , chemistry , genetic algorithm , natural organic matter , ionic bonding , carbon fibers , organic matter , ion , silver salts , inorganic chemistry , organic chemistry , materials science , ecology , biology , composite number , composite material
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.