DYNAMIC ADSORPTION AND DESORPTION OF HEAVY-METAL IONS ON POLY(ACRYLAMINOPHOSPHONIC-CARBOXYL-HYDRAZIDE) CHELATING FIBER

The dynamic adsorption and desorption properties, including the effect of pH value and flow rate on the adsorption, eluent acidity and volum e, eluting velocity and re-use, of Cu(II), Pb(TT), Zn(II), Cd(II), Mn( II), Ni(II), Co(II) and Hg(II) ions on the column loaded with poly(acr yiaminophosphonic-carboxyl-hydrazide) chelating fiber were investigate d. The recovery of Mn(II), Co(II), Cd(II), Ni(II) and Zn(II) ions in t he presence of Na, K, Ca and Mg ions was examined. The preconcentratio n of trace amounts of Mn(II), Co(II), Cd(II), Ni(II) and Zn(II) ions f rom model solution samples was carried out with satisfactory results. The amount of the metal ions detected after preconcentration and recov ery by this technique was basically in agreement with the added amount . The method is rapid, precise and simple.