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master's thesis
Analiza prijenosa tvari pri kompetitivnom vezanju Pb, Cd i Zn iz binarnih sustava na nepomičnom sloju prirodnog zeolita
diplomski rad
2019. urn:nbn:hr:167:455208
Miličević, Blaženka
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

Cite this document

Miličević, B. (2019). Analiza prijenosa tvari pri kompetitivnom vezanju Pb, Cd i Zn iz binarnih sustava na nepomičnom sloju prirodnog zeolita : diplomski rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:455208

Miličević, Blaženka. "Analiza prijenosa tvari pri kompetitivnom vezanju Pb, Cd i Zn iz binarnih sustava na nepomičnom sloju prirodnog zeolita : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2019. https://urn.nsk.hr/urn:nbn:hr:167:455208

Miličević, Blaženka. "Analiza prijenosa tvari pri kompetitivnom vezanju Pb, Cd i Zn iz binarnih sustava na nepomičnom sloju prirodnog zeolita : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2019. https://urn.nsk.hr/urn:nbn:hr:167:455208

Miličević, B. (2019). 'Analiza prijenosa tvari pri kompetitivnom vezanju Pb, Cd i Zn iz binarnih sustava na nepomičnom sloju prirodnog zeolita : diplomski rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, accessed 08 December 2024, https://urn.nsk.hr/urn:nbn:hr:167:455208

Miličević B. Analiza prijenosa tvari pri kompetitivnom vezanju Pb, Cd i Zn iz binarnih sustava na nepomičnom sloju prirodnog zeolita : diplomski rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2019 [cited 2024 December 08] Available at: https://urn.nsk.hr/urn:nbn:hr:167:455208

B. Miličević, "Analiza prijenosa tvari pri kompetitivnom vezanju Pb, Cd i Zn iz binarnih sustava na nepomičnom sloju prirodnog zeolita : diplomski rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Split, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:167:455208

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Metadata
TitleAnaliza prijenosa tvari pri kompetitivnom vezanju Pb, Cd i Zn iz binarnih sustava na nepomičnom sloju prirodnog zeolita : diplomski rad
Title (english)A mass transfer analysis of competitive binding of Pb, Cd and Zn from binary systems onto a fixed zeolite bed : diploma thesis
AuthorBlaženka Miličević
MentorIvona Nuić (mentor)
MBZ: 292293
Committee memberLadislav Vrsalović (predsjednik povjerenstva)
Committee memberMarin Ugrina (član povjerenstva)
Committee memberIvona Nuić (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
(Division of Engineering and Chemistry)
Split
Defense date and country2019-09-30, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Ispitano je uklanjanje kadmijevih i cinkovih iona na nepomičnom sloju prirodnog zeolita iz vodene otopine (Cd+Zn) koncentracijskog omjera Cd/Zn od 0,13 i 0,14, pri protocima od 1 i 2 mL/min. Prirodni zeolit klinoptilolit pokazao je dobru učinkovitost u uklanjanju Cd i Zn iona iz binarnog sustava pri ispitanim eksperimentalnim uvjetima. Dobiveni rezultati uspoređeni su s binarnim sustavom (Pb+Zn) za iste eksperimentalne uvjete. Utvrđen je efekt istiskivanja iona Zn iz strukture zeolita ionima Cd i Pb iz početne otopine. Zn je prekoračio svoju početnu koncentraciju za 1,2 puta u prisutnosti Cd te čak 2,3 puta u prisutnosti Pb. Efekt istiskivanja u sustavu (Pb+Zn) može se pripisati puno manjem hidratiziranom radijusu iona Pb u odnosu na ion Zn, a time i njegovu većem afinitetu. Istiskivanje u sustavu (Cd+Zn) bilo je iznenađujuće zbog vrlo sličnih fizikalno-kemijskih svojstava tih dvaju iona. Pri Cd/Zn = 0,14 te Pb/Zn = 0,19 i protoku od 1 mL/min u oba sustava utvrđeno je bolje vezanje iona Zn u odnosu na ione Cd i Pb, unatoč njegovu slabijem afinitetu. Tor ukazuje da je moguće preferencijalno vezanje iona Cd i Pb kontrolirati početnom koncentracijom iona Zn u binarnom sustavu. Ukupni koeficijent prijenosa tvari veći je za (Cd+Zn) nego za (Pb+Zn) sustav zbog manje izražene kompeticije i migracije iona, a time i manjeg otpora. Najsporiji stupanj je difuzija kroz film te ona kontrolira ukupnu brzinu procesa.
Abstract (english)
The removal of cadmium and zinc ions onto fixed zeolite bed from (Cd+Zn) aqueous solution for the Cd/Zn concentration ratios of 0.13 and 0.14, and for the flow rates of 1 and 2 mL/min has been investigated. The natural zeolite clinoptilolite showed good efficiency in Cd and Zn removal from binary system, for examined experimental conditions. The obtained results have been compared with the (Pb+Zn) binary system for the same experimental conditions. The displacement of Zn ions from the zeolite structure by the Cd and Pb ions from the initial solution has been determined. The Zn exceeded its initial concentration up to 1.2 times in the presence of Cd, and up to 2.3 times in the presence of Pb. The displacement effect in the (Pb+Zn) system can be attributed to the much smaller hydrated radius of Pb ion, compared to the Zn ion, and thus to its higher affinity. The displacement in the (Cd+Zn) system was quite surprising due to very similar physicochemical properties of these two ions. In both systems, for Cd/Zn = 0.14 and Pb/Zn = 0.19 for flow rate of 1 mL/min, the better binding of Zn compared to Cd and Pb has been obtained despite its lower affinity. This is of great importance because it indicates that it's possible to control preferencial binding of Cd and Pb ions by the initial Zn ion concentration in binary systems. The overall mass transfer coefficient shows higher values for the (Cd+Zn) system compared to the (Pb+Zn) system, due to the reduced competition, ions migration and thus the lower resistance. The diffusion through the film is the slowest step responsible for the overall process rate.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:455208
ProjectNumber: 4981
Title: Prirodni zeoliti kao reaktivne barijere za obradu procjednih otpadnih voda odlagališta otpada
Acronym: NAZZELT
Leader: Marina Trgo
Jurisdiction: Croatia
Funder: HRZZ
Study programmeTitle: Chemical Technology; specializations in: Materials, Environmental Protection, Mediteranean Cultures
Course: Environmental Protection
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2019-12-10 11:45:22