Sorption of Zn(II) ions in the presence of methylglycinediacetic acid (MGDA) on the anion exchangers of various basicity degree

Sorption of Zn(II) ions in the presence of methylglycinediacetic acid (MGDA) on the anion exchangers of various basicity degree

Please cite as: CHEMIK 2012, 66, 6, 595-600

The paper presents the results of the studies of the mechanism of Zn(II) ions sorption from aqueous solutions in the presence of methylglycinediacetic acid (MGDA) as a complexing agent. The anion exchangers of Lewatit type of various basicity degrees: strongly basic Lewatit MonoPlus M 500, average basic Lewatit MonoPlus MP 64 and weakly basic Lewatit MonoPlus MP 62 were applied. The kinetic parameters of Zn(II)-MGDA complexes sorption were calculated by means of the static method. There were also determined maxima sorption capacities from the Langmuir linear dependence. The FT-IR spectra of the anion exchanger Lewatit MonoPlus M 500 were registered before and after the sorption of Zn(II)-MGDA complexes.

Keywords: Anion exchangers, Heavy metals, Chelating agents, Sorption, MGDA

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