• Ch.Venkatrao
• D.Rama Sekhara Reddy

In this study batch adsorption of different heavy metal ions (Nickel, Copper, Zinc, Lead, Cadmium and Chromium) in aqueous solution using activated carbon from Corn cobs was investigated. The Corn cob was carbonized between 3000C - 4000C, and activated at 8000C using nitric acid. The iodine number, methylene adsorption,bulk density,Benzene adsorption, and ash content of the Corn cob activated carbon produced compared well with commercial carbons.Textural and surface characteristics of CCAC was determined by XRD,FTIR and SEM.Multiple adsorption of these metals in same aqueous solution using Corn cob carbon showed that adsorption capacity is in the order Pb>Cd>Cu>Zn>Ni>Cr which showed that these metal ions can be adsorbed selectively by Corn cob activated carbon. The order of adsorption is related to the maximum adsorption of lead, cadmium, copper on Corn cob was found to be in the order of ionic radius of the heavy metals used. Therefore this study confirmed that Corn cob can serve as a good source of activated carbon with multiple metal ions – removing potentials and may serve as a better replacement for commercial activated carbons in applications that less expensive adsorbents for the elimination of heavy metal ions from industrial waste water.

Activated Carbon, Multiple adsorption, Heavy metals, Corn cob

"Preparation of Activated Carbon from Corn Cobs for Multiple Adsorption of Heavy Metal Ions in Aqueous Solution", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.488-501, June 2019, Available :http://www.jetir.org/papers/JETIR1908230.pdf

"Preparation of Activated Carbon from Corn Cobs for Multiple Adsorption of Heavy Metal Ions in Aqueous Solution", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp488-501, June 2019, Available at : http://www.jetir.org/papers/JETIR1908230.pdf