Removal of Metal Contaminants by Ion-Exchange Resin Columns,Thala Valley Tip,Casey Station,Antarctica

摘要

Salinity and low temperature effects on adsorption of contaminant metals from water using an iminodiacetic acid (IDA)ion-exchange resin,were investigated under dynamic flow conditions.The order of selectivity of the resin (20 deg C and 0% seawater)was:Cu~(2+)>Pb~(2+)>Cr3+>Ni~(2+)>Cd~(2+)>Zn~(2+).Low temperature (4 deg C)had no significant effect on the selectivity of the contaminant metals and salinity only affected selectivity for Cr~(3+)and Cu~(2+).Copper had highest selectivity in all column experiments,except where extensive deprotonation occured.Buffering affected retention of Cr~(3+);possibly due to precipitation or complexation as a result of increase in pH.