Development of a Column Chromatography Method for Field Pre-Concentration of Trace Metals with Application to the Haw-Cape Fear Rivers, N.C.

摘要

Column chromatography was investigated for adaptation as a field technique for concentrating dissolved trace metals from natural waters. Manganese oxide impregnated acrylic fibers, a chelating resin (Chelex 100), a cation exchange resin (AG-50W) and an anion exchange resin (AG-1) were employed in preliminary work. Ion exchange resins were the most satisfactory and the final design for field use consisted of a cation and an anion exchange column in series. Natural water spiked with CR51as a tracer indicated that soluble Cr(III) and Cr(VI) could be separated by the technique. A portable field unit was constructed and used to carry out a one year survey of Cd,Cr,Cu,Pb,and Zn in the Haw-Cape Fear Rivers of North Carolina. Elevated concentrations of Cr,Cu,and Cd were observed in the upper industrialized areas while Zn and Pb appeared to have sources throughout the basin. Concentration ranges in ug/l were <0.10-1.22Cd, <0.1-26.8Cr, 0.9-9.1Cu, 1.1-74.0Pb and 2.9-74.0Zn.