Sorption of ammonium from surface water on clinoptilolite modifided by polythelenimin

Abstract

In static condition it was shown liner character of isotherms sorption and agreement of
data on modifided PEI and natural clinoptilolites. For investigation it was chosen Na+ forms of
sorbents with higher value of the distribution coefficients. It was shown that on modifided PEI
sorbent at the ammonium break through curves the concentration of calcium ion in solution, as
the macro-component of surface water, remains close to initial level. Dynamics desorption of
ammonium and calcium with 2N NaCL from investigated sorbents was studed. In dynamic
regime in cycles “sorption-desorption” it was shown the high selectivity ammonium sorption
on both sorbents and the possibility to use the modifided PEI sorbent in a suitable cyclic process
of ammonium sorption from surface water.