KINETIKA ADSORPSI LOGAM BERAT Cr(VI) DENGAN ADSORBEN PASIR YANG DILAPISI BESI OKSIDA

YC. Danarto

Abstract

Adsorption into iro-oxide coated sand is an interesting alternative for removal of dissolved Cr(VI) in aqueous solution waste industry due to the material characteristics, the availability this material in Indonesia and economic considerations. Many adsorption experiments based on equilibrium research and less of them based on kinetics adsorption research. The objective of this work was to study the appropriate kinetic model for adsorption dissolved Cr(VI) in aqueous solution and the kinetic adsorption dependency upon temperature. The experiment was carried out in a stirred batch flask. Iron-oxide coated sand was contacted with Cr(VI) solution at constant temperature. Sample was drawn at certain times and the remaining heavy metal concentration was measured by Atomic Absorption Spectrophotometer (AAS). The results showed that the pseudo-first-order model was the most appropriate model for explaining the adsorption of Cr(VI) solution into iron-oxide coated. The results also indicated that temperature had significant effect to the rate constant of pseudo-first-order adsorption model ( k1)  and maximum capacity of adsorption  (qe).

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References

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DOI: https://doi.org/10.20961/ekuilibrium.v6i2.49628

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