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Abstract

Palladium is used in several biomedical and technological applications and has very low natural abundance in the earth crust. Ionically cross-linked N-succinyl chitosan beads (NSCBs) have been synthesized and tested for extraction of palladium from aqueous waste. Batch extraction studies have been carried out to understand the influence of various experimental parameters on the sorption behaviour of palladium. Sorption kinetics is found to be fast and the kinetics data fitted well in to pseudo second-order model for the sorption of palladium ions onto the composite beads. Different sorption isotherm models have also been applied to the experimental data. Equilibrium data are found to be represented well by Langmuir isotherm equation, with monolayer sorption capacity of around 6 mg/ g for the swollen beads and 60 mg/g for the dried beads. Reusability of the beads has also been established by multiple sorption-desorption experiments.

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Chitosan N-Succinyl chitosan Sorption Palladium Polymeric beads

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