Removal of Pollutants from Waste Foundry Sand by Chemical Washing Method

Abstract

The purpose of this research was to remove of metallic contaminant and other pollutants from waste foundry sand(WFS) by chemical washing method. Firstly, experimental investigation for removing of metallic contaminant and other pollutants from waste foundry sand(WFS) by using three different solutions 5 M HCl, 5 M H2SO4 and 5M NaOH. The extraction is carried out 3, 8 and 16 hours for each solution at 25 0C. After that, two - stage washing (successive washing with two different chemical) and triptych washing (successive washing with three different chemical) was applied to WFS. Functional group analysis of WFS and WFS after washing was done by using FT-IR. Results show the highest percentage of pollutant removal in H2SO4 – NaOH – HCl of triptych washing method.