REMOVAL OF CHROMIUM (VI) BY PREPARED ACTIVATED CARBON

CIVILENGINEERING

Heavy metals are continuously released into the aquatic environment in various ways. They adversely affect the ecosystem. Heavy metal pollution has become one of the most serious environmental problems now-a-days. The removal of heavy metals from wastewater is one of special concern. So, removal of heavy metals is primary important aspect. A variety of traditional and advance techniques are available. Adsorption is one of the techniques. Activated carbon is one of the well-known adsorbents. It is having high adsorption capacity, due to large surface area and pore volume. In recent years, huge research has been focused towards converting the agricultural wastes into activated carbon to make the adsorption process economical. In this study karanja seeds with shells (Pongamia pinnata shell) are used for the preparation of activated carbon. These are agricultural waste and so economical. The activated carbon prepared from karanja seeds with shells has been used for removal studies of Cr (VI) from wastewater. Different characteristics of prepared activated carbon such as moisture content, ash content, specific gravity, and decolourising power are to be found out. Experimental studies were conducted to find out the effect of contact time, pH, carbon dosage on Cr (VI) removal. There by finding out optimum contact time, optimum dosage and optimum pH for decided initial concentration of Cr (VI).

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