Determination of the parameters ionite complexes formed by nickel sorption weak base anion exchangers AM-7

Abstract

Studied of weak basic AM-7 anionite complexing with nickel cations. It is shown that the sorption of nickel ions from aqueous solutions is satisfactorily described by the Langmuir equation, the linear approximation which allows to determine the maximum sorption capacity of the complexing anion. To determine the characteristics of complex ionite - sorption capacity, stability constants and coordination number - consider two independent methods: determination of stability constants for the distribution coefficient and by the destruction of ammonia complexes of nickel in contact with the deprotonated form of the resin. The calculated stability constants of complexes ionite and value of coordination number in both cases are in satisfactory agreement.