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  • 1 Poznan University of Technology Faculty of Chemical Technology, Radio- and Photochemistry Department ul. Piotrowo 3 60-965 Poznan Poland
  • 2 Institute of Ecotechnology State High Vocational School Gniezno Poland
  • 3 Adam Mickiewicz University Faculty of Chemistry, Department of Rare Earths Poznan Poland
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Abstract  

This study was conducted to investigate radiochemiluminescence (RCL) spectra (340–650 nm), kinetics and absorption spectra of humic acids (HA) after their exposure of γ-radiation (absorbed doses of 1–10 kGy, 60Co) in model systems. The kinetics and spectral distribution of RCL were measured using the single photon counting method (SPC) and cut-off filters. Absorption spectra (range 240–800 nm) of irradiated solutions indicated that post-radiative degradation/polymerization processes take place in the HA changing their macromolecule or properties. The intensity of the delayed RCL was nonlinearly and suggested that complex radical formation mechanisms were still involved in the post-radiative reactions.