Sensing and removal of chromium metal ion from water using spectroscopic and adsorption techniques

There is scarcity of pure drinking water due to variety of pollutants present in water bodies. Out of different pollutants heavy metal ions particularly Chromium ions are highly toxic to living organism. There is a need to find out some suitable method for detection and removal of Chromium ions from water. Chromium exists in different oxidation state depending on the pH of the medium. The experiments were performed in two parts. In the first part Chromium in different oxidation states was detected spectrophotometrically by using a biogenically synthesized silver nanoparticles (Ag NPs). After detecting the presence of Cr (VI) metal ions, a batch experiment was carried out to check the removal efficiency of copper ferrite polyaniline-nanocomposite for Cr (VI) metal ions. The removal efficiency was maximum at pH 2.0. Different adsorption isotherm and kinetic models were tested.