EQUILIBRIUM AND KINETIC ANALYSIS OF SORPTION OF COPPER ONTO DIATOMACEOUS EARTHReportar como inadecuado




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Fuels and lubricants : journal for tribology, lubrication, application of liquid and gaseous fuels and combustion engineering, Vol.51 No.2 July 2012. -

In developing new materials for the sorption of mercury from hydrocarbon mixtures, based on copper-modified diatomaceous earth, sorption of copper from aqueous solutions of Cu2+ ions on natural Dz as well as on conditioned diatomaceous earth was investigated. Dz was conditioned in two ways, by rinsing Dz-I and by hydration Dz-H-48. Equilibrium and kinetic sorption analysis was performed by a simple batch procedure at 25, 40 and 60 °C; concentration of Cu in solution was measured by atomic absorption spectroscopy. It was found that Dz-I was capable of binding significantly more copper 79.10 mg g-1 than Dz 44.8 mg g-1; increasing temperature diminished the mass of bound copper. Equilibrium sorption of water on Dz, Dz-I and Dz-H-48 was successfully described by the Freundlich model. Sorption kinetics was well approximated by the Lagergren 1st order pseudokinetic model.

Datomaceous earth; sorption; copper; Freundlich sorption isotherm; Lagergren pseudokinetic model



Autor: Ljiljana Marinić Pajc - ; INA-Industrija nafte d.d., Zagreb Marko Rogošić - orcid.org-0000-0002-2341-0067 ; University of Zagr

Fuente: http://hrcak.srce.hr/



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