Synthesis and application of chelating resins based on polyacrylonitrilediethylenetriamine for metal ions removal

Abstract

Chelating resins based on polyacrylonitrile and diethylenetriamine (PAN-DTA) were<br />prepared through the simple reaction of polyacrylonitrile with various volume percents of<br />diethylenetriamine (DTA), (25, 50, 75 and 100). The prepared resins were applied to remove<br />heavy metal ions such as Cu(II), Zn(II) and Cd(II) from aqueous solutions. The sorption<br />behaviors of the resins for these metal ions were found to be greater at higher solution pH values.<br />Highest sorption on PAN-DTA was determined as 5 mmol g-1 for Cu(II). The number of amine<br />groups present in the resin (amine capacity) is depended on the volume percent of DTA and the<br />maximum capacity was obtained 6.25 mmol g-1. The resins and their metal complexes have been<br />studied by FT-IR spectroscopy, scanning electronic microscopy (SEM) and thermogravimetry<br />analysis (TGA). All these analyses methods confirmed the presence of metal in the metal-resin<br />complexes.