Studies of metal ion uptake behaviour of formaldehyde condensed resins of phenolic Schiff bases derived from the reaction of 4,4'-diaminodiphenyl and 4,4'-diaminodiphenylmethane with o-hydroxybenzaldehyde

摘要

The metal ion uptake characteristics of two new chelating resins,o-HB-DDM-HCHO and o-HB-DD-HCHO,were examined towards transition metal ions like Cu~(2+),Ni~(2+) and UO_2~(2+) under both competitive and non-competitive conditions.The resin o-HB-DDM-HCHO was found to be more effective in removing metal ions in comparison to resin o-HB-DD-HCHO.Preferential adsorption of Cu~(2+) by both the resins was observed from the mixture of salt solution.Elution of the sorbed metal ions using dilute HCI resulted in removal of nearly 30-40% of the loaded Cu~(2+) and 34-45% of loaded UO_2~(2+) from the resin column.