Study of sorptive ability of nitrogen-containing wood derivatives with respect to ions of diverse metals

Sorptive ability of wood oxidating ammonolysis products towards Fe3+, Cu2+, Cd2+ and Ca2+ ions was studied under equilibrium conditions. It was ascertained that exchange capacity of modified wood depends on the content of carboxylic groups and nitrogen compounds in it; for Cd2+ ions its value makes up 5.22 and 5.41 g-eq./g at cadmium concentration in the initial solution 0.01 and 0.1 g-eq./l respectively. It is shown that the high sorptive ability of nitrogen-containing wood derivatives towards multi-charged cations stems from their chelating properties