Features of formation and identification of sparingly soluble and coordination compounds of polyhexametyleneguanidine with Pb(ІІ), Cd(ІІ), Cu(ІІ), Zn(ІІ) in aqueous solutions

Abstract

2. Literature review and problem statement In the analysis of the methods of heavy metal ions removal from solutions, we should note two main trends: the metal ion transfer to a sparingly soluble state [1], and the consolidation of the pollutant ion binding associates [2]. The fulfillment of these conditions greatly facilitates the process of coagulation, flocculation, filtering and precipitation. Given the above, it is of interest to study the formation features of compounds of ions of the investigated metals with PHMG and choose the optimum conditions for the selected reactant. At the same time, it is well known that the guanidine compounds are highly effective and much less toxic to humans compared with other biocidal agents. Such a low toxicity of guanidine is due to the fact that warm-blooded organisms have enzyme systems, which can cause polymer degradation [3, 4]. The presence of rather high positive surface charge gives the properties of cationic polyelectrolyte, flocculant and