Waste aq. PdCl2 or PdCl2, + NiCl2 solns., liquors from Pd-electrolysis, aq.-org. solns. contg. MeOH or formalin, and like waste solns. were each passed through a silica gel and an activated C bed to remove 21-84 and 71.4-99% of Pd, resp. This was eluted from the beds with acetonic N-benzoylthiourea in 90. This eluent appears promising for concng. Pd solns.