Sorption activity of materials based on a fiber-forming copolymer of acrylonitrile and 2-acrylamid-2-methylpropanesulfonic acid

The article summarizes results of studies of homophase synthesis of a copolymer based on acrylonitrile and 2-acrylamid-2-methylpropanesulfonic acid synthesized with an acidic comonomer content in a reaction mixture of 30 % (by weight of monomers) in a 51.5 % aqueous solution of sodium thiocyanate. On its basis, fibrous and granular ion - exchange materials were produced and their sorption activity was studied. By the method of acid - base titration, its static exchange capacity (SOE) was determined, which amounted to 1.40 mmol - eq/g. Complexometric titration was used to produce data on the dynamics of sorption of zinc ions by ionite from ZnSO4 solutions in the concentration range of 0.001- 0.1 mol - eq/dm3. The dynamic characteristics of the sorption of zinc ions by the ion exchanger in H+ and Na+-forms are given. It is noted that it is difficult to work with materials containing more than 30 % (by weight of monomers) of the acidic comonomer, due to the strong swelling of the sample.