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.
Drug delivery is a very complex phenomenon. Most of the drugs are soluble in the water and flow easily in the body. However, drugs consisted of complex organics crystallize in different morphologies such as needles, plates, dendrites and organized lamellars. We have observed that 3.methoxy 4-hydroxybenzaldehyde also known as “vanillin” forms needles and plate morphologies in very small difference of pH or organic impurities and can crystallize in different forms. We have performed extensive studies to understand the crystallization of binary and ternary complex organic materials systems to understand the crystallization and morphologies. We will present the results of non-water-soluble organics using melt methods and discuss the mechanism of formation of different morphologies. More specifically results of 3.methoxy 4-hydroxybenzaldehyde-m.dinitrobenzene and 8- hydroxyquinoline-succinonitrile, systems will be discussed.
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