INFLUENCE OF LANDSCAPE IONS ON SORBTION OF HEAVY METALS ON CATIONITE
Urgency of the research. Actual issues are the treatment of sewage of galvanic plants containing heavy metal ions. The cumulative effect, the carcinogenic action of the latter on living organisms leads to an active search for ways to remove heavy cations from sewage. The method of ion exchange is of interest. Target setting. Wastewater from galvanic plants contains mixtures of heavy metal cations. It was advisable to investigate the effect of rigidity ions on the selectivity of ion exchangers and the prospects of separation of heavy metals during sorption on strongly acidic ion exchangers. Actual scientific researches and issues analysis. The processes of sorption of zinc, cadmium, nickel and copper ions on cation exchange of KU-2-8 have been investigated. The selectivity of cation exchangers for heavy metal ions at low concentrations is less selectivity in ions of rigidity. At ion-exchange mitigation of water it is possible to extract copper ions on weakly acidic cation exchangers. Uninvestigated parts of general matters defining is the evaluation of the influence of rigid ions on the sorption of heavy metal ions when they are removed from sewage from galvanic productions when used for washing of tap water parts. The research objective was the study of the influence of rigidity ions and the mutual influence of heavy metal ions on their sorption on strongly acidic cation exchangers. The statement of basic materials. Cationite KU-2-8 effectively removes ions of heavy metals from solutions containing their mixtures. It is shown that the difference in the selectivity of cation exchangers on heavy metal ions is not sufficient for efficient separation during sorption. It was established that ionite adsorbs copper ions from water even at low concentrations with a hardness of 4.8 mg-eq/dm3. Mixtures of heavy metals in acid regeneration are washed out of cation exchanger KU-2-8 not worse than ion exchanged with sorbent one type of heavy metal ions. Conclusions. In the conditions of concentration of heavy metals on cation exchangers it is impossible to effectively divide these cations data. When applying ion-exchange extraction of cations of heavy metals from galvanostics, it is necessary to use desalted or Na-cationized water. It has been established that heavy metal ions are sorbed individually and in mixtures with other heavy metal ions are effectively desorbed with sulfuric acid, regardless of the ratio in sorption volume.