Chemical Forms of Antimony in Shooting Range Soils: An X-Ray Absorption Spectroscopy Study


Chemical Forms of Antimony in Shooting Range Soils: An X-Ray Absorption Spectroscopy Study

Scheinost, A.; Roßberg, A.; Vantelon, D.; Kretzschmar, R.; Johnson, C. A.

We determined Sb speciation in 9 soil samples from 6 Swiss shooting ranges using Sb K-edge EXAFS spectroscopy and advanced statistical data analysis methods (ITFA). Despite the high variability in Geology, pH (3.1 - 7.5) and Sb concentrations (1000 - 17000 mg/kg), we found only two species: metallic Sb(0) and Sb(V) forming inner-sphere sorption complexes on Fe oxide surfaces. The relative amount of Sb(0) ranged from 0 to 75 %, the relative amount of Sb(V) ranged from 25 to 100 %. Distribution between the two species was not explained by any of the measured variables. No evidence for Sb(III) was found in the bulk samples. To the best of our knowledge this is the first quantitative determination of the chemical Sb forms in bulk soil samples.

  • Invited lecture (Conferences)
    1st International Workshop on Antimony in the Environment, 16.-19.05.2005, Heidelberg, Germany

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Publ.-Id: 7097