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Dissolved Cu(II) Speciation in Unpolluted Soil Solutions of a Planosolic Horizon
Author(s) -
Pelfrêne Aurélie,
Gassama Nathalie,
Grimaud Daniel
Publication year - 2008
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200704104
Subject(s) - genetic algorithm , dissolved organic carbon , anodic stripping voltammetry , chemistry , adsorption , inorganic chemistry , stripping (fiber) , voltammetry , stability constants of complexes , environmental chemistry , ion , electrode , electrochemistry , organic chemistry , materials science , composite material , evolutionary biology , biology
Abstract Dissolved Cu(II) speciation in unpolluted soil solutions from different horizons was studied using differential pulse anodic stripping voltammetry (DPASV). Three sites were selected according to topography and monitored for three years. Experiments evidence Cu(II) can be bound by DOM (Dissolved Organic Matter) through complexation and/or adsorption reactions. The complexation capacity and the corresponding conditional stability constant were determined for complexation reactions. The adsorbing sites were titrated. A potential binding coefficient was calculated to compare both types of reactions. Results show adsorption is less frequent than complexation but exhibits higher binding coefficient.