Abstract
Functionalized celluloses containing nitrilotriacetic acid, thiourea and cysteine have been prepared for the uptake of a series of trace metal ions, namely Al(III), Ca(II), Cd(II), Co(II), Cu(II), Fe(III), Hg(II), Mg(II), Ni(II), Pb(II) and Zn(II). The recovery has been evaluated as a function of pH, and the capacities determined at the pH of maximum yield. The experimental yields obtained for the metal recoveries have been compared with the ones calculated with the aid of the computed distribution of metal-ligand species. The materials obtained may be utilized for the enrichment of trace metals, for the demetalization of solutions, and for speciation studies.
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