prikaz prve stranice dokumenta Uklanjanje CrO4 aniona iz vode prirodnim i modificiranim zeolitom
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master's thesis
Uklanjanje CrO4 aniona iz vode prirodnim i modificiranim zeolitom
Zagreb: University of Zagreb, Faculty of Graphic Arts, 2008. urn:nbn:hr:216:981051
Keletić, Marko
University of Zagreb
Faculty of Graphic Arts

Institutional repository: Faculty of Graphic Arts Repository

Cite this document

Keletić, M. (2008). Uklanjanje CrO4 aniona iz vode prirodnim i modificiranim zeolitom (Master's thesis). Zagreb: University of Zagreb, Faculty of Graphic Arts. Retrieved from https://urn.nsk.hr/urn:nbn:hr:216:981051

Keletić, Marko. "Uklanjanje CrO4 aniona iz vode prirodnim i modificiranim zeolitom." Master's thesis, University of Zagreb, Faculty of Graphic Arts, 2008. https://urn.nsk.hr/urn:nbn:hr:216:981051

Keletić, Marko. "Uklanjanje CrO4 aniona iz vode prirodnim i modificiranim zeolitom." Master's thesis, University of Zagreb, Faculty of Graphic Arts, 2008. https://urn.nsk.hr/urn:nbn:hr:216:981051

Keletić, M. (2008). 'Uklanjanje CrO4 aniona iz vode prirodnim i modificiranim zeolitom', Master's thesis, University of Zagreb, Faculty of Graphic Arts, accessed 30 July 2024, https://urn.nsk.hr/urn:nbn:hr:216:981051

Keletić M. Uklanjanje CrO4 aniona iz vode prirodnim i modificiranim zeolitom [Master's thesis]. Zagreb: University of Zagreb, Faculty of Graphic Arts; 2008 [cited 2024 July 30] Available at: https://urn.nsk.hr/urn:nbn:hr:216:981051

M. Keletić, "Uklanjanje CrO4 aniona iz vode prirodnim i modificiranim zeolitom", Master's thesis, University of Zagreb, Faculty of Graphic Arts, Zagreb, 2008. Available at: https://urn.nsk.hr/urn:nbn:hr:216:981051

Metadata
TitleUklanjanje CrO4 aniona iz vode prirodnim i modificiranim zeolitom
AuthorMarko Keletić
MentorMirela Rožić (mentor)
Committee memberMirela Rožić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Graphic Arts
Zagreb
Defense date and country2008-7-00, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Graphic Technology
Abstract
Ispitana je adsorpcija kromatnog aniona (CrO42-) na klinoptilolitom bogatom tufu modificiranog s kvarternim surfaktantom heksadeciltrimetil amonijevim bromidom (HDTMA+Br-). Na negativno nabijenu površinu klinoptilolita, HDTMA+ kationi adsorbiraju se jakim Coulombovim (ionskim) vezama. Dok je prvi sloj surfaktanta vezan kationskom izmjenom, drugi sloj je vezan hidrofobnim interakcijama i stabiliziran protuionima (Br- ioni). Promjena zeta potencijala od negativnog na pozitivni mijenja prirodu zeolita koji poprima svojstva anionskog izmjenjivača. U otopini koncentracije 19,02 mg CrO42-/l na uzorak organo-zeolita s dvoslojnom konfiguracijom HDTMA+ iona, adsorbiralo se 1,44 mg CrO42-/g zeolita (75,5%), a u otopini koncentracije 107,8 mg CrO42-/l adsorbiralo se 2,74 mg CrO42-/g zeolita (25,4%). Na uzorcima na čijim je vanjskim površinama adsorbiran samo monosloj HDTMA+ kationa najvjerojatniji mehanizam adsorpcije kromatnih aniona je površinsko taloženje HDTMA-CrO42- kompleksa.
Abstract (english)
The chromium anion (CrO42-) adsorption behavior on modified clinoptilolite-rich tuff was investigated. Tuff was modified with the quaternary surfactant hexadecyltrimethyl ammonium bromide (HDTMA+Br-). Cations adsorb on negatively charged clinoptilolite surface by Coulomb (ionic) bonds. While the first surfactant layer is engaged in cation exchange, second layer is engaged in hydrophobic interactions and stabilized by Br- ions. Changing zeta potential from negative to positive changes the nature of zeolite, which becomes an ion exchanger. On organozeolite sample with two-layer configuration of HDTMA+ ions, 1,44 mg CrO42-/g of zeolite was adsorbed from the solution containing 19,02 mg CrO42-/l, which is 75,5% 2,74 mg CrO42-/g of zeolite (25,4%) was adsorbed from the solution containing 107,8 mg CrO42-/l (25,4%). The most probable mechanism of adsorption for chromate ions for samples on which outer surface only HDTMA+ cation layer was adsorbed, is the surface sedimentation of HDTMA-CrO42- complex.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:216:981051
Study programmeTitle: Graphic technology; specializations in: Graphic technology, Design of graphic products
Course: Graphic technology
Study programme type: university
Study level: graduate
Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka grafičke tehnologije (sveučilišni/a magistar/magistra inženjer/inženjerka grafičke tehnologije)
Type of resourceText
File originBorn digital
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Created on2024-04-17 10:38:04