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master's thesis
Utjecaj pH vrijednosti na mehanizam uklanjanja farmaceutika RO/NF membranama
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2016. urn:nbn:hr:149:656218
Puškarić, Anita
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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Puškarić, A. (2016). Utjecaj pH vrijednosti na mehanizam uklanjanja farmaceutika RO/NF membranama (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:656218

Puškarić, Anita. "Utjecaj pH vrijednosti na mehanizam uklanjanja farmaceutika RO/NF membranama." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2016. https://urn.nsk.hr/urn:nbn:hr:149:656218

Puškarić, Anita. "Utjecaj pH vrijednosti na mehanizam uklanjanja farmaceutika RO/NF membranama." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2016. https://urn.nsk.hr/urn:nbn:hr:149:656218

Puškarić, A. (2016). 'Utjecaj pH vrijednosti na mehanizam uklanjanja farmaceutika RO/NF membranama', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 26 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:656218

Puškarić A. Utjecaj pH vrijednosti na mehanizam uklanjanja farmaceutika RO/NF membranama [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2016 [cited 2024 November 26] Available at: https://urn.nsk.hr/urn:nbn:hr:149:656218

A. Puškarić, "Utjecaj pH vrijednosti na mehanizam uklanjanja farmaceutika RO/NF membranama", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2016. Available at: https://urn.nsk.hr/urn:nbn:hr:149:656218

Metadata
TitleUtjecaj pH vrijednosti na mehanizam uklanjanja farmaceutika RO/NF membranama
Title (english)Effect of pH on removal mechanism of pharmaceuticals with RO/NF membranes
AuthorAnita Puškarić
MentorKrešimir Košutić (mentor)
Committee memberKrešimir Košutić (predsjednik povjerenstva)
Committee memberDavor Dolar (član povjerenstva)
Committee memberDanijela Ašperger (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2016-07-14, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Mechanical, Thermal and Separation Processes
Abstract
U ovom radu ispitivan je utjecaj pH otopine (pH = 4, 7 i 10) na mehanizam membranskog uklanjanja odabranih farmaceutika: prazikvantela, enrofloksacina i sulfadiazina. Istraživanje je provedeno s komercijalnim reverzno osmotskim i nanofiltracijskim (RO/NF) membranama: XLE, UTC-70HA, BW30, NF, NF90 i NF270. Zadržavanje farmaceutika analizirano je na osnovu njihove veličine molekula, naboja i hidrofilnosti u odnosu na karakteristike membrana. S povećanjem pH vrijednost otopine, povećava se negativni naboj površine membrane, a pri pH vrijednostima ispod pKa komponente se adsorbiraju i raspodjeljuju kroz membranu. Pri pH iznad pKa, adsorpcija komponenata je minimalna zbog povećane topljivosti pa utjecaj elektrostatskog odbijanja postaje značajan. Zaključno, na učinkovitost uklanjanja farmaceutika prvenstveno utječe mehanizam isključenja po veličini, ali je potrebno uzeti u obzir i utjecaj međudjelovanja farmaceutika i membrana.
Abstract (english)
In this work the effect of pH (pH = 4, 7, 10) on the rejection mechanism of selected pharmaceuticals (praziquantel, enrofloxacin, sulfadiazine) was studied. Several commercial RO/NF (XLE, UTC-70HA, BW30, NF, NF90, NF270) membranes were studied at different pH values. Their retention and flux were explained by the size exclusion, charge and the hydrophilic/hydrophobic characteristics of selected components and membranes. Increasing pH, resulted in an increased negative surface charge, at the pH below the pKa selected components adsorbed and partitioned through the membrane. At the pH above the pKa, adsorption of components was minimal due to an increased solubility and the significant role of electrostatic repulsion. The effectiveness of removing pharmaceuticals from model water with RO/NF membranes was influenced by size exclusion mechanism and the interaction between pharmaceuticals and membranes. Dominant rejection mechanism of the examined pharmaceuticals was the size exclusion.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:656218
Study programmeTitle: Applied Chemistry - Graduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Environmental chemistry and green technologies
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra primijenjene kemije (magistar/magistra primijenjene kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2017-07-06 08:36:18