prikaz prve stranice dokumenta Površinska svojstva i otapanje fluorita
  Download
PDF 3.62 MB
master's thesis
Površinska svojstva i otapanje fluorita
Zagreb: University of Zagreb, Faculty of Science, 2023. urn:nbn:hr:217:402022
Jurković, Ana
University of Zagreb
Faculty of Science
Department of Chemistry

Institutional repository: Repository of the Faculty of Science

Cite this document

Jurković, A. (2023). Površinska svojstva i otapanje fluorita (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:402022

Jurković, Ana. "Površinska svojstva i otapanje fluorita." Master's thesis, University of Zagreb, Faculty of Science, 2023. https://urn.nsk.hr/urn:nbn:hr:217:402022

Jurković, Ana. "Površinska svojstva i otapanje fluorita." Master's thesis, University of Zagreb, Faculty of Science, 2023. https://urn.nsk.hr/urn:nbn:hr:217:402022

Jurković, A. (2023). 'Površinska svojstva i otapanje fluorita', Master's thesis, University of Zagreb, Faculty of Science, accessed 23 December 2024, https://urn.nsk.hr/urn:nbn:hr:217:402022

Jurković A. Površinska svojstva i otapanje fluorita [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2023 [cited 2024 December 23] Available at: https://urn.nsk.hr/urn:nbn:hr:217:402022

A. Jurković, "Površinska svojstva i otapanje fluorita", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:217:402022

Metadata
TitlePovršinska svojstva i otapanje fluorita
Title (english)Surface properties and dissolution of fluorite
AuthorAna Jurković
MentorTajana Begović (mentor)
Committee memberTajana Begović (predsjednik povjerenstva)
Committee memberAdriana Kenđel (član povjerenstva)
Committee memberŽeljka Soldin (član povjerenstva)
Committee memberDavor Kovačević (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Chemistry)
Zagreb
Defense date and country2023-02-24, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
Kinetika otapanja (100), (110) i (111) plohe fluorita u vodi praćena je potenciometrijski mjerenjem koncentracije Ca2+, F– i H+ iona u otopini ion-selektivnim elektrodama tijekom 84 dana otapanja. Tenziometrijom i mikroskopom atomskih sila praćen je utjecaj otapanja na promjenu močivosti površine i topografiju (100), (110) i (111) ploha fluorita mjerenjem kontaktnog kuta i faktora hrapavosti prije i nakon otapanja. Površinski potencijal (100), (110) i (111) plohe monokristala fluorita tijekom 24 sata otapanja mjeren je fluoritnim monokristalnim elektrodama, a elektrokinetički potencijal nanočestica fluorita tijekom 37 dana otapanja određen je mjerenjem elektroforetske pokretljivosti nanočestica fluorita. Istražen je i utjecaj H+, OH–, F– i Ca2+ iona na elektrokinetički potencijal nanočestica fluorita. Metodama statičkog i dinamičkog raspršenja svjetlosti određen je hidrodinamički promjer i promjer giracije nanočestica fluorita. Određeni su koeficijenti brzine difuzije iona u otopinu za (100), (110) i (111) plohu te iznose: 0,005 s–1 ; 0,045 s–1 i 0,03 s–1.
Abstract (english)
Ion selective electrodes were used to study dissolution kinetics of (100), (110) and (111) fluorite crystallographic planes by measuring Ca2+, F– and H+ ion concentration in the solution. Tensiometry and atomic force microscopy were employed for measuring dissolution impact on contact angle and surface roughness of specified fluorite crystallographic planes. Surface potential change of mentioned fluorite crystallographic planes during 24 hours of dissolution was investigated using a single crystal electrode. The electrokinetic potential of fluorite nanoparticles during dissolution was determined by measuring electrophoretic mobility. The influence of H+, OH–, F– i Ca2+ ions on the electrokinetic potential of fluorite nanoparticles was also investigated. The hydrodynamic diameter and diameter of gyration of fluorite nanoparticles were determined using static and dynamic light scattering methods. The ion diffusion rate coefficients in the solution for (100), (110) and (111) planes were obtained: 0.005 s–1, 0.045 s–1 and 0.03 s–1 respectively.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:402022
ProjectNumber: IP-2020-02-9571
Title: Fizikalna kemija procesa na međupovršini mineral/otopina (poli)elektrolita
Title: Physical chemistry of processes at mineral/(poly)electrolyte solution interface
Acronym: POLYMIN2
Leader: Tajana Begović
Jurisdiction: Croatia
Funder: HRZZ
Funding stream: IP
Study programmeTitle: Graduate university studies in chemistry; specializations in: Research programme
Course: Research programme
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra kemije (magistar/magistra kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Embargo expiration date: 2024-08-24
Terms of useLicence In copyright icon
Created on2023-03-30 11:43:46