Column Studies on the Adsorption of Cadmium (Cd) in Aqueous Solution on Raffia Palm Seed ( Raphia Hookeri ) Activated Carbon (original) (raw)

2018

Abstract

The adsorption performance of a packed bed column using zinc chloride modified Raffia Palm Seed Activated Carbon (RPSAC) for the removal of cadmium ion from aqueous solution was investigated. The adsorption kinetics was analyzed using Thomas (KTH), Adam-Bohart (KAB) and Yoon- Nelson (KYN) models. The values of KTH and KAB increased with increasing flow rate and bed height but decreased with increasing initial concentration, while those of KYN were found to increase with increase in flow rate, bed height and initial concentration. The time required for 50% breakthrough for the Yoon-Nelson model decreased with increasing flow rate from 100 to 70 min and increased from 100 to 160 min with increasing bed height, while it decreased from 100 to 40 min with increasing metal ion concentration. In general the kinetics of cadmium adsorption on RPAC was fitted to the models in the order of Thomas > Yoon Nelson > Adam-Bohart with R2 values ranging from 0.71-0.99, 0.73-0.98 and 0.75-0.88 r...

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