Wydział Chemii

Adam Jezierski

Franciszek Czechowski

Maria Jerzykiewicz

Iwona Golonka

Jerzy Drozd

Ewa Bylińska

Yona Chen

M. R. D. Seaward

2002

Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy

58

1293-1300

10.1016/S1386-1425(01)00718-1

Naukowa

Angielski

Artykuł

Quantitative electron paramagnetic resonance (EPR) method was applied to characterise radicals stabilised in polyphenolic matrices of various biogenic materials: lichens, mosses, composts, soils, peats, brown coals and sewage sludge sediments. The investigations were carried out on raw materials and extracted fractions of humic acids (HA). General trends of g value and spin concentration changes were found. These parameters in lichens strongly depend on lichen species and air pollution. Determination of the g value and semiquinone spin concentration allows to assess degree of transformation of organic matter in compost, soil, peat and lignite. Application of gaseous ammonia as a base penetrating the organic matrices extends the possibilities and usefulness of the method. Interaction of metal ions with humic materials is illustrated by interaction of VO²⁺ ion with peat and lignite HA as well as demineralised (raw and carbonised) brown coal. Our investigations demonstrate that quantitative EPR is a rapid and effective monitoring method to study the influence of various environmental factors on substances containing polyphenolic matrices.

Lichens, Mosses, Composts, Brown coals, Humic acids, Polyphenols, Semiquinones, EPR

https://doi.org/10.1016/S1386-1425(01)00718-1

http://www.elsevier.com