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You are here : eLibrary : IAHR Asia Pacific Division Proceedings : 19th IAHR APD Congress, Hanoi 2014 : Session 1: ENVIRONMENTAL HYDRAULICS : ACTIVATED CARBON DER IVED FROM THE TROPICAL AGRICULTURAL WASTES (CORN CO B , RICE S TRAW) AND ITS...
ACTIVATED CARBON DER IVED FROM THE TROPICAL AGRICULTURAL WASTES (CORN CO B , RICE S TRAW) AND ITS APPLICATION FOR TREATMENT OF THE INDUSTRIAL WASTEWATER
Author : LAN T.N.PHAM (1) , VAN T. NGUYEN (2)
Production of activated
carbons (activated charcoal) from agricultural wastes is one of the good methods to solve the
environmental problems caused by burning and getting rid of the crop wastes: emission of CO
2 into the atmosphere-the main reason of the global climate change, pollution of air and inhibition of the vision, etc... Besides, there is a great economical value of recycling the corncob and rice straw to produce activated carbons which have many applications for treatment industrial wastewaters. In this study, a series of activated carbons experiments were done
from the agricultural waste corn cob and rice straw by the chemical activation using phosphoric acid, sulfuric acid, zinc chloride and potassium hydroxide as activating agents. Many factors affecting the process have been studied such as the pyrolysis temperature, soaking time and chemical treatment of the raw materials through the impregnation ratio of the production of adsorbent in order to determine the optimal conditions. As the results, the important parame
ters in the chemical activation of corncob and rice straw with ZnCl2, KOH, H3PO4, H2SO4 are the impregnation ratio and the pyrolysis temperature. Under the
experimental conditions in the laboratory, the temperature of 350oC for pyrolysis process and of 550oC for activation during 120 minutes with phosphoric acid and sulfuric acid were found to be the optimal condition for producing high surface area carbons in the range of 982-
1234 m2/g. The activated carbons produced in this work were used as an excellent sorbent to remove color and heavy metals: copper (Cu2+), iron (Fe2+), zinc (Zn2+), Chromium trivalent (Cr3+) from various wastewaters such as: as metal plating, mining, tanneries.
File Size : 831,916 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR Asia Pacific Division Proceedings
Category : 19th IAHR APD Congress, Hanoi 2014
Article : Session 1: ENVIRONMENTAL HYDRAULICS
Date Published : 09/03/2015
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