Influence of Pb(II) on the radical properties of humic substances and model compounds.

@article{Giannakopoulos2005InfluenceOP,
  title={Influence of Pb(II) on the radical properties of humic substances and model compounds.},
  author={Evangelos Ag. Giannakopoulos and Konstantinos C. Christoforidis and Athanassios C. Tsipis and Maria Jerzykiewicz and Yiannis G. Deligiannakis},
  journal={The journal of physical chemistry. A},
  year={2005},
  volume={109 10},
  pages={
          2223-32
        }
}
The influence of Pb(II) ions on the properties of the free radicals formed in humic acids and fulvic acids was investigated by electron paramagnetic resonance spectroscopy. It is shown that, in both humic acid and fulvic acid, Pb(II) ions shift the radical formation equilibrium by increasing the concentration of stable radicals. Moreover, in both humic acid and fulvic acid, Pb(II) ions cause a characteristic lowering of the stable radicals' g-values to g = 2.0010, which is below the free… CONTINUE READING
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