Electron Paramagnetic Resonance Spectroscopy Applied to Biosorption

摘要

The Electron Paramagnetic Resonance Spectroscopy is a non-destructive analysis technique used in the study of the electronic structure of paramagnetic centres. This technique can be applied to the investigation of metal-charged biomasses in order to give information about sorption sites and biosorption mechanisms. In this paper we review some technical aspects about EPR Spectroscopy and study, as a model system, Cu~(2+) ions sorbed by dried leaves. The Cu~(2+) ion is seen to be incorporated to the biomass in a site with axial symmetry.