膜科学技術ジャーナル

概要

Removal of Chromium Ions from Drinking Water Using an Ultrafiltration Membrane

Ruby John

The goal of this study was to see how effective a locally created Polyacrylonitrile (PAN) based Ultrafiltration (UF) membrane was at removing chromium ions from drinkable water. The hydrolyzed PAN membranes successfully rejected chromium ions in solution in the feed at concentrations ranging from 250 ppb to 400 ppm, with a rejection of 90% for pH 7 at low chromate concentrations (25 ppm) in feed. The Donnan exclusion principle was found to be very important in the rejection of chromium ions, whereas the size exclusion principle did not play a significant impact in the rejection of UF ions. The pH of the feed controlled the porosity of the membrane, which impacted the chromate ion retention behavior.