Chelating fibers prepared with a wet spinning technique using a mixture of a viscose solution and a polymer ligand for the separation of metal ions in an aqueous solution

摘要

Chelating fibers containing polymer ligands such as carboxymethylated polyallylamine, carboxymethy-lated polyethyleneimine, and a copolymer of diallylamine hydrochloride/maleic acid were prepared with a wet spinning technique using mixtures of a viscose solution and the polymer ligands. The chelating fibers obtained effectively adsorbed various metal ions, including Cd(Ⅱ), Co(Ⅱ), Cr(Ⅲ), Cu(Ⅱ), Fe(Ⅲ), Mn(Ⅱ), Ni(Ⅱ), Pb(Ⅱ), Ti(Ⅳ), and Zn(Ⅱ). The metal ions adsorbed could be readily desorbed using 0.1 or 0.5molL~(-1) HNO3. The chelating fiber containing carboxymethylated polyallylamine was available for the separation of some metal ions in synthetic wastewater containing a large amount of Na_2SO_4.The wet spinning technique using a solution containing a base polymer and a polymer ligand was quite simple and effective and would be applicable for preparing various chelating fibers.