Publisher: Chemical Society of Nigeria

Sorption Models of Cadmium (11) Ion Onto Agricultural Tuber Wastes

I. A. Okoro
KEYWORDS: Cadmium, sorption models, tuber waste biomass, biosorbent

ABSTRACT:

Sorption models and sorption capacities of tuber wastes for cadmium (11) ion were investigated. The results showed that more than ninety–five percent of initial concentration of cadmium (11) ion in the aqueous solution was sorbed by each of these tuber wastes. The results obtained from the modelling of the results of sorption studies using Langmuir and Dubinin –Radushkevich models showed that the maximum sorption capacity (Qmax) obtained is thus yam peels> sweet potato peels > cassava peels .The calculated porosity values (Qd) l/g showed yam peels > sweet potato peels > cassava peels. The calculated sorption energy E, showed the trend thus sweet potato peels > cassava peels > yam peels. The Langmuir constant obtained showed closely related values for the three tuber wastes studied.


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