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EQUILIBRIUM AND KINETIC ANALYSIS OF SORPTION OF COPPER ONTO DIATOMACEOUS EARTH
Ljiljana Marinić Pajc
; INA-Industrija nafte d.d., Zagreb
Marko Rogošić
orcid.org/0000-0002-2341-0067
; Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu
Alka Horvat
; Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu
Anita Štrkalj
; Metalurški fakultet Sveučilišta u Zagrebu
Sažetak
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.
Ključne riječi
Datomaceous earth; sorption; copper; Freundlich sorption isotherm; Lagergren pseudokinetic model
Hrčak ID:
84369
URI
Datum izdavanja:
5.7.2012.
Posjeta: 2.357 *