Adsorption of copper, cobalt and nickel ions from ternary solutions on the zeolite 13x

master's thesis

• Title (croatian): Adsorpcija bakrovih, kobaltovih i niklovih iona Iz ternarnih otopina na zeolitu 13x
• Author: Donna-Maria Abou Khalife
• Mentor: Mario Nikola Mužek (mentor)
• Committee member: Mario Nikola Mužek (predsjednik povjerenstva)
• Committee member: Ivona Nuić (član povjerenstva)
• Committee member: Ladislav Vrsalović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Granter: University of Split; Faculty of Chemistry and Technology; Split
• Defense date and country: 2021-11-16, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

The demand for global water resources increases with the increase of the human population leading to higher costs and stricter regulations. The higher the demand for water resources the higher the pressure on natural resources and the higher the damage made to the environment, causing a big threat to the sustainability of the economic development. The wastewater generated by industries represents a threat to human health so its treatment is necessary prior discharging into the environment. In this diploma thesis, the adsorption of copper, cobalt, and nickel ions on the zeolite 13X was studied depending on different initial concentrations of heavy metal ions from the ternary solutions. The experiments were conducted in batch reactors at a constant temperature of 27°C, with a stirring speed of 200 rpm for 72 h. The adsorbed amount of copper and cobalt ions increases with the increase in the initial concentration of selected ions in the ternary solutions, while in case of nickel ions it varies with the increase in the initial concentration. The highest amount of heavy metals adsorbed from the solutions was one corresponding to the copper ions with the value of qe = 1.496 mmol/g obtained at the initial concentration of c0 = 35.006 mmol/L. The adsorption efficiency of the zeolite 13X for all heavy metal ions (copper, cobalt, and nickel ions) from the ternary solutions decreases with the increase in the initial concentrations. The experiments conducted showed that the best adsorption efficiency was achieved for the removal of copper ions and equals ≈ 95% for the lowest initial concentration of copper ions in ternary solution. The results obtained were tested using Langmuir and Freundlich isotherm models. The best-fitting with the experimental results for the adsorption of copper, cobalt, and nickel ions on the zeolite 13X is obtained by applying the Langmuir model, while the Freundlich isotherm model showed significantly lower fitting with the experimentally obtained results.

Abstract (croatian)

Potražnja za vodnim resursima na svjetskoj razini raste s povećanjem ljudske populacije što dovodi do viših troškova i strožih propisa. Što je veća potražnja za vodnim resursima, to je veći pritisak na prirodne resurse i veća se šteta nanosi okolišu, što predstavlja veliku prijetnju održivosti gospodarskog razvoja. Otpadne industrijske vode predstavljaju prijetnju ljudskom zdravlju, stoga ih je potrebno na propisan način obraditi prije ispuštanja u okoliš. U ovom diplomskom radu proučavana je adsorpcija bakrovih, kobaltovih i niklovih iona na zeolitu 13X ovisno o različitim početnim koncentracijama iona teških metala u ternarnim otopinama. Eksperimenti su provedeni u šaržnim reaktorima pri stalnoj temperaturi od 27°C, brzini miješanja od 200 okr/min tijekom 72 h. Adsorbirana količina bakrovih i kobaltovih iona raste s porastom početne koncentracije odabranih iona u ternarnim otopinama, dok adsorbirana količina niklovih iona iz otopina varira s povećanjem početne koncentracije. Najviša količina teškog metala adsorbirana iz otopina je odgovarala bakrovim ionima i iznosi qe = 1,496 mmol/g pri početnoj koncentraciji c0 = 35.006 mmol/L. Učinkovitost zeolita 13X u adsorpciji svih iona teških metala (bakrovih, kobaltovih i niklovih iona) iz ternarnih otopina opada s povećanjem početne koncentracije iona. Provedeni eksperimenti pokazali su da je najbolja učinkovitost adsorpcije postignuta pri uklanjanju bakrovih iona i iznosi ≈ 95% pri najnižoj početnoj koncentraciji bakrovih iona u ternarnoj otopini. Dobiveni rezultati ispitani su Langmuirovim i Freundlichovim modelima izotermi. Najbolje slaganje s eksperimentalnim rezultatima adsorpcije bakrovih, kobaltovih i niklovih iona na zeolitu 13X postignuto je primjenom Langmuirovog izotermnog modela, dok je Freundlichov izotermni model pokazao značajno slabije slaganje s eksperimentalno dobivenim rezultatima.

• Keywords: adsorption; copper ions; cobalt ions; nickel ions; zeolite 13X; ternary solutions; isotherms
• Keywords (croatian): adsorpcija; bakrovi ioni; kobaltovi ioni; niklovi ioni; zeolit 13X; ternarne otopine; izoterme
• Language: english
• URN:NBN: urn:nbn:hr:149:778979
• Study programme: Title: Chemical and environmental technology - graduate - university; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-03-31 12:47:05