화학공학소재연구정보센터
Industrial & Engineering Chemistry Research, Vol.47, No.16, 6221-6227, 2008
Polyaspartic acid as a new complexing agent in removal of heavy metal ions on polystyrene anion exchangers
In the presented paper, the sorption of copper(II) and zinc(II) in the presence of polyaspartic acid sodium salt on polystyrene ion exchangers from aqueous solutions was studied. This polyaspartic acid sodium salt is an active, water soluble polyaminocarboxylate with the multifunctional property profile. It is a complexing agent of a new generation as it undergoes biodegradation thus being an alternative for the reagents of the EDTA or NTA type. On the basis of the research, the applicability of gel and macroporous polystyrene anion exchangers with different functional active groups, Lewatit MonoPlus M 500, Lewatit MonoPlus M 600, and Lewatit MonoPlus MP 500 as well as Lewatit MonoPlus MP 64 and Lewatit MP 62, was determined by the dynamic technique. Batch experiments were also carried out to determine the factors affecting sorption and kinetics of the sorption process.