Solid-phase Extraction of Trace Elements Using a Chelating Fiber Prepared with a Wet-spinning Technique Employing a Mixture of Viscose and Fine Particulate Chelate Resin Immobilizing Carboxymethylated Pentaethylenehexamine

A chelating fiber was prepared with a wet spinning technique using a mixture of viscose and slurry containing wet-milled chelate resin immobilizing carboxymethylated pentaethylenehexamine. The solid-phase extraction behavior of several elements, such as Cd, Cu, Fe, Ni, Pb, and Zn, using the chelating fiber was almost the same as that using the chelate resin. The chelating fiber could effectively extract the elements under the conditions at a high flow rate and a large solution volume. The extractions of alkaline earth elements, such as Mg and Ca, were observed under weakly acidic, neutral, and alkaline conditions. The presence of coexisting ions, including sulfate ion, interfered with the extraction of elements. These facts would be due to the low content of the chelate resin in the chelating fiber. The solid-phase extraction technique using the chelating fiber was applicable to the separation of 6 kinds of elements, including Cd, Co, Cu, Fe, Ni and Zn, in the certified reference material (EU-L-1 wastewater).