Abstract
The discharge of heavy metal ions into the environment, due to extensive industrialization and inadequate waste disposal, has become a worldwide issue. Since heavy metals are not biodegradable, they accumulate in living organisms. The most common toxic metal ions in water are arsenic, lead, copper, cadmium, chromium, nickel, zinc, cobalt and manganese. Different treatment technologies such as coagulation, chemical precipitation, ion-exchange and filtration have been employed for pollutant removal from water, but adsorption is still one of the most suitable technologies for heavy metal ions removal. Recent studies show that graphene oxide, functionalized graphene oxide and their composites can efficiently remove heavy metal ions from water. This chapter reviews the application of graphene oxide nanocomposites in the removal of toxic heavy metal ions from aqueous solution.
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