Extraction of Carbonate hydroxyapatite from eggshell and its use as adsorbent of heavy metals

Heavy metal pollution is a major environmental concern. Heavy metals do not decompose in the environment and can influence living of animals, plants and human. Nowadays, many different methods are for the recovery and removal of heavy metals from wastewater and environment. Adsorption process is one of the most widely used methods for the removal of heavy metals. Various adsorbents are used in this process. Eggshells are one of the household and industrial wastes which are produced in large amounts during the year. In this reviewed study, extraction of the carbonate hydroxy apatite from eggshell and its ability to retrieve and remove heavy metals (cadmium, copper and lead) has been investigated.