Publisher: Chemical Society of Nigeria

Adsorption of Lead (II) Ion From Aqueous Solution Using Activated Carbon Prepared From Coconut Coirpith

H. I Adegoke, F. A. Adekola
KEYWORDS: coconut coirpith, Activated carbon, Freundlich and Langmuir Adsorption Isotherms

ABSTRACT:

Activated carbons were prepared from coconut coirpith using 0.5M orthophosphoric acid, 0.5M sodium hydroxide and 0.5M trioxonitrate (v) acid as the chemical activating reagents. The prepared activated carbons were initially characterized and later applied for the adsorption of Pb (II) ion ranging from 100-500mg/l aqueous solution. The results obtained indicated that sodium hydroxide treated -activated carbon performed best when compared to others prepared from orthophosphoric acid and trioxonitrate (V) acid. The adsorption data fitted well with the Langmuir and Freundlich adsorption isotherms. The adsorption capacity calculated for the various chemically-activated charcoals from the Langmuir and Freundlich adsorption isotherms were in the range18.05 - 37.31mg/g and 23.25-36.56 mg/g at 28 ±2oC respectively.


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