to 135 ppm for identical leachate prepared from the same mrs sorbent without treating with lime prior to conducting the test the leachate contains 0 1 ppm nickel as compared with 1 8 ppm nickel in the leachate prepared from the same mrs sorbent without treatment with lime sodium level is reduced to 10 ppm sodium as compared to 14 ppm sodium without treatment with lime these results and the results of the examples which follow are tabulated in table i table i______________________________________ concentra concentration of tion of metal additives wt in filtrate based on weight of ppm example additive dry sorbent v ni na______________________________________i none none 135 1 8 14ii nahco sub 3 27 6 170 iii caco sub 3 20 6 123 iv naoh 2 117 v caso sub 4 10 112 vi caso sub 4 10 137 naoh 4 2 i powdered lime 10 55 0 1 10vii caf sub 2 10 69 0 3 12______________________________________ not measured as v was unacceptably high when the techniques of example i are repeated utilizing sodium bicarbonate nahco 3 in place of lime the concentration of vanadium in the filtrate is 170 ppm as compared with 55 ppm using lime on the same sorbent even.