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Pregled bibliografske jedinice broj: 497040

Kinetics and thermodynamics study of copper ions removal by natura clinoptilolite


Ćurković, Lidija; Trgo, Marina; Rožić, Mirela; Vukojević Medvidović, Nediljka
Kinetics and thermodynamics study of copper ions removal by natura clinoptilolite // Indian journal of chemical technology, 18 (2011), 2; 137-143 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 497040 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Kinetics and thermodynamics study of copper ions removal by natura clinoptilolite

Autori
Ćurković, Lidija ; Trgo, Marina ; Rožić, Mirela ; Vukojević Medvidović, Nediljka

Izvornik
Indian journal of chemical technology (0971-457X) 18 (2011), 2; 137-143

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
clinoptilolite ; copper ; diffusion ; kinetic models ; thermodynamic parameters

Sažetak
The process of removal of copper ions by means of clinoptilolite type natural zeolite has been studied as a function of the particle size and temperature. Results shown that increase temperature and decrease of particle size improves removal of copper from aqueous solutions. The parabolic diffusion model well described process in all examined range of time and shows that calculated diffusion coefficients increases with temperature. This increase is more visible at higher particle sizes what assume diffusion through zeolite particle as main mass transfer mechanism. The film diffusion model provides calculation of initial sorption rate (k´) and dimensionless parameter proportional to the diffusion film thickness (xi), in relation of particle size and temperature. Diffusion from the surface of zeolite particles through the micro and macro pores is well described with homogenous diffusion model, where changes of the calculated overall rate constants is observed at 60 minute of the process. This indicates the change of mass transfer rate trough porous zeolite particle. The activation energy (Ea), activation enthalpy (delta_H), activation entropy (delta_S) and free energy of activation (delta_G) have been calculated based on kinetic data. These thermodynamic parameters characterize process as diffusion dependent, weakly endothermic and nonspontaneous, where structural changes in structure of natural zeolite particle are not observed.

Izvorni jezik
Engleski

Znanstvena područja
Grafička tehnologija, Kemijsko inženjerstvo



POVEZANOST RADA


Projekti:
120-1201833-1789 - Istraživanje strukture i svojstava tehničke keramike i keramičkih prevlaka (Ćurković, Lidija, MZOS ) ( POIROT)
125-1253008-3009 - Membranski i adsorpcijski postupci uklanjanja organskih tvari pri obradbi voda (Košutić, Krešimir, MZOS ) ( POIROT)
011-0000000-2239 - Prirodni zeoliti u zaštiti voda (Perić, Jelena, MZOS ) ( POIROT)

Ustanove:
Kemijsko-tehnološki fakultet, Split

Citiraj ovu publikaciju:

Ćurković, Lidija; Trgo, Marina; Rožić, Mirela; Vukojević Medvidović, Nediljka
Kinetics and thermodynamics study of copper ions removal by natura clinoptilolite // Indian journal of chemical technology, 18 (2011), 2; 137-143 (međunarodna recenzija, članak, znanstveni)
Ćurković, L., Trgo, M., Rožić, M. & Vukojević Medvidović, N. (2011) Kinetics and thermodynamics study of copper ions removal by natura clinoptilolite. Indian journal of chemical technology, 18 (2), 137-143.
@article{article, author = {\'{C}urkovi\'{c}, Lidija and Trgo, Marina and Ro\v{z}i\'{c}, Mirela and Vukojevi\'{c} Medvidovi\'{c}, Nediljka}, year = {2011}, pages = {137-143}, keywords = {clinoptilolite, copper, diffusion, kinetic models, thermodynamic parameters}, journal = {Indian journal of chemical technology}, volume = {18}, number = {2}, issn = {0971-457X}, title = {Kinetics and thermodynamics study of copper ions removal by natura clinoptilolite}, keyword = {clinoptilolite, copper, diffusion, kinetic models, thermodynamic parameters} }
@article{article, author = {\'{C}urkovi\'{c}, Lidija and Trgo, Marina and Ro\v{z}i\'{c}, Mirela and Vukojevi\'{c} Medvidovi\'{c}, Nediljka}, year = {2011}, pages = {137-143}, keywords = {clinoptilolite, copper, diffusion, kinetic models, thermodynamic parameters}, journal = {Indian journal of chemical technology}, volume = {18}, number = {2}, issn = {0971-457X}, title = {Kinetics and thermodynamics study of copper ions removal by natura clinoptilolite}, keyword = {clinoptilolite, copper, diffusion, kinetic models, thermodynamic parameters} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus





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