Humic acids from coal of the North-Bohemia coal field III~☆. Metal-binding properties of humic acis-measurements In a column arrangement

摘要

The ion exchange properties of humic acids prepared form oxidized young coals of the North-Bohemia coal field, the so-called oxyhumolites, were measured. A flow arrangement was used i.e. separation of metals in columns packed with ativated humic acids. Solutions containing only one metal (Pb~2+, Cd~2+, Cu~2+, Zn~2+, Ca~2+, Mg~2+, Co~2+, Mn~2+) and solutions containing two and more metals were tested. The penetrating capacities were measured for a nubmer of metal ions under conditions emulating industrial applications of humate-based sorbents. Penetrating capacities are related to the total capacities estimated from measurements in a static system and a metal-binding model published previously, although they are, as expected, slightly lower.