Factors affecting ammonium capture by some Victorian lignites.

HighlightsVictorian lignites were assessed for their retention capacity using adsorption isotherms and N tracing. adsorption capacity of lignites increased (up to 3-fold) with pH, especially from pH 5 to 7.Biological immobilisation did not play a substantial role in the retention capacity of the lignites.pH-dependent adsorption was the dominant means by which lignite retained .