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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Adsorption and Separation of Ag(I) Using a Merrifield Resin Bound NTOE, NDOE in Aqueous Solution

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1999, v.12 no.2, pp.159-165
Lee, Cheal-Gyu
Kim, Hae Joong
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Abstract

The adsorption and separation behaviors of transition metal ions using a merrifield resin bound 1,12-diaza-3,4:9,10-dibenzo-5,8-dioxacyclopentadecane (NTOE) and 1,12,15-triaza-3,4:9,10-dibenzo-5,8-dioxacycloheptadecane(NDOE) were investigated in aqueous solution. The orders of adsorption degree(E) and distribution ratio(D) of transition metal ions were Cu(II)<Ni(II)<Co(II)<Zn(II)<Cd(II)<Pb(II)<Ag(I), the magnitudes were found to be inversely proportional to the hydration free energy of transition metal ions. Also, from the elution curves for Co(II)-Cd(II)-Ag(I), Ni(II)-Cu(II)-Pb(II) and Zn(II)-Cd(II)-Pb(II)-Ag(I) mixed metal solution, the retention times(<TEX>$t_R$</TEX>) of metal ions were affected by adsorption degree(E) and distribution ratio(D). This results showed good separation efficiency of Ag(I) from mixed metal solution.

keywords
merrifield resin bound NTOE and NDOE, adsorption degree, distribution ratio, hydration free energy of transition metal ions


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