Napredna pretraga

Pregled bibliografske jedinice broj: 588360

Ammonium adsorption on natural zeolite (clinoptilolite): Adsorption isotherms and kinetics modeling.


Kučić, Dajana; Markić, Marinko; Briški, Felicita
Ammonium adsorption on natural zeolite (clinoptilolite): Adsorption isotherms and kinetics modeling. // The Holistic Approach to Environment, 4 (2012), 145-158 (podatak o recenziji nije dostupan, članak, znanstveni)


Naslov
Ammonium adsorption on natural zeolite (clinoptilolite): Adsorption isotherms and kinetics modeling.

Autori
Kučić, Dajana ; Markić, Marinko ; Briški, Felicita

Izvornik
The Holistic Approach to Environment (1848-0071) 4 (2012); 145-158

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

Ključne riječi
Ammonium ions; Natural zeolite; Sorption isotherms; Linear and non-linear regression.

Sažetak
A batch sorption process for removal of ammonium ions from aqueous solution using natural zeolite was studied. Tree different particle sizes of zeolite (1-2 mm, 2-4 mm and 4-10 mm) were used in the experiments. Sorption of ammonium ions on natural zeolite were carried out at 298 K with the initial concentrations of ammonium in the range of 1000 – 7000 mg NH4+-N/dm3. Equilibrium data were fitted by Freundlich and Langmuir isotherm and sorption kinetic data by pseudo-first and second order. The parameters were estimated by linear and non-linear method. Results show that non-linear method may be superior way to compute the parameters. The Langmuir isotherm model fitted better the experimental data with a maximum monolayer adsorption capacity of 58.36 mg NH4+-N/g (1-2 mm), 49.02 mg NH4+-N/g (2-4 mm) and 46.46 mg NH4+-N/g (4-10 mm), respectively. Also, the pseudo-second-order kinetic model was the best applicable model to describe the sorption kinetics. The obtained results suggest that the natural zeolite is a good adsorbent for removal of ammonium ions from aqueous solution and that ion exchange increased with decreasing of particle sizes of natural zeolite.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo



POVEZANOST RADA


Projekt / tema
125-1251963-1968 - Aerobno kompostiranje čvrstog otpada u reaktorskom sustavu (Felicita Briški, )

Ustanove
Fakultet kemijskog inženjerstva i tehnologije, Zagreb

Uključenost u ostale bibliografske baze podataka:


  • Chemical Abstracts
  • DOAJ - Directory of Open Access Journals
  • IndexCopernicus
  • ProQuest Natural Sciences Journals
  • ProQuest Environmental Sciences Journals
  • Illustrata: Natural Sciences
  • Prorch