Removal of Trace Level Metal Impurities from Ultrapure Water by Filter Cartridge Including Ion Exchange Grafted Membrane

Abstract

Metal removal performance of filter cartridge with bi-layered structure was investigated. The filter was prepared using UHMWPE and ion exchange membrane made by grafting polymerization. In filtration experiment, feed ultrapure water was controlled spiking of 15 metals at ppt level, and removal performance of each metal was determined using ICP-MS measurement of filtrate. Metal adsorption behavior for most of the metals were following the classical fluid dynamic theory and the boundary layer controlled reaction. The results were compared to conventional UHMWPE membrane filter and discussed for each metal.