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Biosolubilization of low-rank coal by aTrametes versicolor siderophore-like product and other complexing agents

1990; Springer Science+Business Media; Volume: 5; Issue: 6 Linguagem: Inglês

10.1007/bf01578100

0169-4146

Jim Fredrickson, D.L. Stewart, James A. Campbell, M.A. Powell, M. McMulloch, John W. Pyne, R.M. Bean,

Clay minerals and soil interactions

A heat stable, low molecular weight (<1000) extracellular product inTrametes versicolor (=Coriolus versicolor=Polyporous versicolor) cultures was demonstrated to be a principal factor in the solubilization of leonardite and other low-rank coals. The solubilization of leonardite byT. versicolor cell-free cultures and active fractions was inhibited by Fe3+ and was mimicked by the siderophore desferal mesylate and the iron chelating agents EDTA and 8-hydroxyquinoline. Leonardite solubilization by these later compounds was also inhibited by Fe3+. The ferrated and unferrated form of the partially purified active component fromT. versicolor cultures demonstrated absorption spectra that were similar to the ferrated and unferrated form of desferal mesylate.