alexa Spectrophotometric Study on Kinetics and Thermodynamics of Adsorption and Catalytic Transformation of K2Cr2O7 to K2CrO4 by Natural Hermit Crab Shell Powder | Abstract
ISSN: 2150-3494

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Research Article

Spectrophotometric Study on Kinetics and Thermodynamics of Adsorption and Catalytic Transformation of K2Cr2O7 to K2CrO4 by Natural Hermit Crab Shell Powder

Abstract

The adsorption and transformation of K2Cr2O7 at natural hermit crab shell powder was studied by UV-visible spectrophotometry. K2Cr2O7 is adsorbed at natural hermit crab shell powder, and follows the Freundlich adsorption model with the adsorption constant of KF=888.8 and adsorption free energy change of 16.83 kJ.mol-1. The adsorbed K2Cr2O7 is catalytically transformed into K2CrO4 in moderate conditions by natural hermit crab shell powder with the apparent first-order rate constant of 0.0219 s-1, and equilibrium constant of K=2.27×1012 M-1.

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