Solid Phase Extraction of Trace Copper(II) Using Modified Nano Polyacrylonitrile Fiber

Abstract

A simple method has been developed for the preconcentration of copper(II) based on the adsorption of
its Modified nano polyacrylonitrile fiber. Modified nano polyacrylonitrile fiber (PANF) was prepared by adding
of acrylic fibers to mSethanolamine (MMA) with different concentration solutions. The stability of a chemically
Modified nano polyacrylonitrile fiber especially in concentrated hydrochloric acid which was then used as a
recycling and pre-concentration reagent for further uses of modified nano polyacrylonitrile fiber. The application
of this Modified nano polyacrylonitrile fiber for sorption of a series of metal ions was performed by using
different controlling factors such as the pH of metal ion solution and the equilibration shaking time by the static
technique. Cu (II) was found to exhibit the highest affinity towards extraction by these Modified nano
polyacrylonitrile fiber phases. The pronounced selectivity was also confirmed from the determined distribution
coefficient (Kd) of all the metal ions, showing the highest value reported for Cu (II) to occur by Modified nano
polyacrylonitrile fiber. The potential applications of Modified nano polyacrylonitrile fiber for selective
extraction of Cu(II) to occur from aqueous solution were successfully accomplished as well as pre- concentration
of low concentration of Cu(II) (60 pg ml-1) from natural tap water with a pre-concentration factor of 100 for
Cu(II) off-line analysis by flame atomic absorption analysis.