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Molecular Scale Speciation of First‐Row Transition Elements Bound to Ligneous Material by Using X‐ray Absorption Spectroscopy
Author(s) -
Guillon Emmanuel,
Merdy Patricia,
Aplincourt Michel
Publication year - 2003
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200304920
Subject(s) - extended x ray absorption fine structure , xanes , x ray absorption spectroscopy , chemistry , absorption (acoustics) , genetic algorithm , spectroscopy , absorption spectroscopy , coordination number , analytical chemistry (journal) , materials science , environmental chemistry , physics , quantum mechanics , evolutionary biology , composite material , biology , ion , organic chemistry
To develop a solid scientific basis for maintaining soil quality and formulating effective remediation strategies, it is critical to determine how environmentally‐important trace metals are sequestered in soils at the molecular scale. The speciation of Mn, Fe and Cu in soil organic matter has been determined by synchrotron‐based techniques: extended X‐ray absorption fine structure (EXAFS) and X‐ray absorption near edge structure (XANES). We show the structural similarity between the surface complexes of Mn II , Fe III and Cu II . These cations are bound to the surface through oxygen atoms. Each one presents a more or less tetragonal‐distorted octahedral geometry. The use of X‐ray absorption spectroscopy provides a relevant method for determining trace‐metal speciation in both natural and contaminated environmental materials.