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Sorption of lead ions from aqueous solution using tree fern as a sorbent

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Sorption of lead ions from aqueous solution

using tree fern as a sorbent

許淳森

Ho YS;Chiu WT;Hsu CS;Huang CT

摘要

Abstract

This study is on sorption of lead ions on an agricultural by-product, tree fern. Equilibrium isotherms have been

measured and modeled. The equilibrium sorption capacity of lead(II) was determined from the Langmuir isotherm and

found to be 40.0 mg/g. Based on the assumption of the pseudo-second order mechanism, a batch sorption model was

developed to predict the rate constant of sorption, the equilibrium sorption capacity and the initial sorption rate with the

effect of initial lead(II) concentration and temperature. The sorption rate was found to increase with temperature, and an

activation energy of approximately 87 kJ/mol was determined from the pseudo-second order rate constants. The findings

of this investigation suggest that chemical sorption plays a role in controlling the sorption rate.

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