Removal of Cd(ll) from polluted water by filtration using iron oxide coated sand media

Abstract

Cadmium is a poisonous metal that may influence numerous organs in the human body; coated sand with iron oxide (IOCS) was prepared and utilized in this study as a filter media to investigate its removal efficiency of cadmium from Synthetic polluted water. The removal efficiency variation due to pH value, operation time, and the initial concentration were investigated. The results show good capability of the filtration media in removing cadmium ions which could reach about 95 % at a specific operating condition, optimal pH value, and operation time were 4, 30 min respectively while initial concentration higher than 1 mg/l would require longer operation time. In order to provide a practical tool to predict the removal efficiency under specific operating conditions a mathematical model and statistical analysis was applied, statistical analysis showed that the model had good representation capability.