Techniques for Metal Removal and Recovery from Waste Stream

Metal contamination in the environment is one of the persistent global environmental problems and their adverse health effects have been well documented. Heavy metals can be found in various forms, including fine particles, liquid and gas. On the contrary, metal resource depletion also has accelerated dramatically during the twentieth century owing to advances in industrial engineering and sciences, which require large amounts of raw materials. Therefore, researchers have started to focus on developing technologies which can remove metals from the environment and recover them to reuse as material.