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master's thesis
Utjecaj molekularnog blokiranja heksilaminom na poboljšanje performansi komercijalnih reverzno osmotskih membrana
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2024. urn:nbn:hr:149:133696
Grganović, Dominik
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

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Grganović, D. (2024). Utjecaj molekularnog blokiranja heksilaminom na poboljšanje performansi komercijalnih reverzno osmotskih membrana (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:133696

Grganović, Dominik. "Utjecaj molekularnog blokiranja heksilaminom na poboljšanje performansi komercijalnih reverzno osmotskih membrana." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2024. https://urn.nsk.hr/urn:nbn:hr:149:133696

Grganović, Dominik. "Utjecaj molekularnog blokiranja heksilaminom na poboljšanje performansi komercijalnih reverzno osmotskih membrana." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2024. https://urn.nsk.hr/urn:nbn:hr:149:133696

Grganović, D. (2024). 'Utjecaj molekularnog blokiranja heksilaminom na poboljšanje performansi komercijalnih reverzno osmotskih membrana', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 26 December 2024, https://urn.nsk.hr/urn:nbn:hr:149:133696

Grganović D. Utjecaj molekularnog blokiranja heksilaminom na poboljšanje performansi komercijalnih reverzno osmotskih membrana [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2024 [cited 2024 December 26] Available at: https://urn.nsk.hr/urn:nbn:hr:149:133696

D. Grganović, "Utjecaj molekularnog blokiranja heksilaminom na poboljšanje performansi komercijalnih reverzno osmotskih membrana", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:149:133696

Metadata
TitleUtjecaj molekularnog blokiranja heksilaminom na poboljšanje performansi komercijalnih reverzno osmotskih membrana
Title (english)Enhancing commercial reverse osmosis membranes performance: Investigating the impact of molecular plugging with hexylamine
AuthorDominik Grganović
MentorKrešimir Košutić (mentor)
Committee memberKrešimir Košutić (predsjednik povjerenstva)
Committee memberMarica Ivanković (član povjerenstva)
Committee memberVladimir Dananić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2024-09-26, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Reverzna osmoza (RO) jedna je od najefikasnijih tehnologija za desalinaciju i pročišćavanje vode, no suočava se s izazovima pri uklanjanju malih, neutralnih molekula poput N-nitrozamina (NTR), koji su potencijalno kancerogeni i opasni po ljudsko zdravlje. Tradicionalne RO membrane imaju ograničenu sposobnost zadržavanja tih spojeva, što zahtijeva inovativne pristupe u njihovoj modifikaciji. Ovaj rad istražuje metodu molekularnog blokiranja uz primjenu heksilamina (HEX) i heksametildiamina (HDMA) kako bi se povećalo zadržavanje NTR-a na RO membranama. Uvođenje ovih molekularnih blokatora unutar poliamidnog sloja tanko-slojnih RO membrana ima potencijal značajno poboljšati selektivnost i efikasnost membrana prema neutralnim molekulama NTR-a, a posebno N-nitrozodimetilamina (NDMA) koji je najmanji među njima. Primjena HEX-a i HDMA dovela je do promjena u raspodjeli veličine pora i broju učinkovitih pora, što je rezultiralo smanjenjem propusnosti membrane (od 5 do 33%), uz zadržavanje razine pogodnih za RO procese. HEX i HDMA su pokazali pozitivan učinak na zadržavanje NTR-a s membranama ACM1, ACM5 i BW30LE. Posebno se zadržavanje NDMA s ACM1 poboljšalo za 65,5% i 70,6% nakon tretmana s HEX-om i HDMA-om.
Abstract (english)
Reverse osmosis (RO) is one of the most efficient technologies for desalination and water purification, but it faces challenges in removing small, neutral molecules like N-nitrosamines (NTRs), which are potentially carcinogenic and hazardous to human health. Traditional RO membranes have limited ability to retain these compounds, necessitating innovative modification approaches. This study explores molecular plugging using hexylamine (HEX) and hexamethylenediamine (HDMA) to enhance NTR retention on RO membranes. Introducing these molecular plugs within the polyamide layer of thin-film RO membranes significantly improves selectivity and efficiency towards neutral NTR molecules, particularly the smallest, N-nitrosodimethylamine (NDMA). The application of HEX and HDMA led to changes in pore size distribution and the number of effective pores, resulting in a decrease in membrane permeability (from 5 to 33%), while maintaining levels suitable for RO processes. HEX and HDMA exhibited a positive effect on NTR rejection with ACM1, ACM5, and BW30LE membranes. Specifically, NDMA retention was improved by 65.5% and 70.6% with ACM1 after treatment with HEX and HDMA, respectively.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:133696
Study programmeTitle: Environmental Engineering - Graduate study
Study programme type: university
Study level: graduate
Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka ekoinženjerstva (sveučilišni/a magistar/magistra inženjer/inženjerka ekoinženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2024-11-07 10:05:10