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master's thesis
Antibakterijsko djelovanje nanočestica metalnih oksida na klinoptilolitu
Zagreb: University of Zagreb, Faculty of Science, 2012. urn:nbn:hr:217:704618
Škrtić, Tea
University of Zagreb
Faculty of Science
Department of Biology

Institutional repository: Repository of the Faculty of Science

Cite this document

Škrtić, T. (2012). Antibakterijsko djelovanje nanočestica metalnih oksida na klinoptilolitu (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:704618

Škrtić, Tea. "Antibakterijsko djelovanje nanočestica metalnih oksida na klinoptilolitu." Master's thesis, University of Zagreb, Faculty of Science, 2012. https://urn.nsk.hr/urn:nbn:hr:217:704618

Škrtić, Tea. "Antibakterijsko djelovanje nanočestica metalnih oksida na klinoptilolitu." Master's thesis, University of Zagreb, Faculty of Science, 2012. https://urn.nsk.hr/urn:nbn:hr:217:704618

Škrtić, T. (2012). 'Antibakterijsko djelovanje nanočestica metalnih oksida na klinoptilolitu', Master's thesis, University of Zagreb, Faculty of Science, accessed 11 May 2024, https://urn.nsk.hr/urn:nbn:hr:217:704618

Škrtić T. Antibakterijsko djelovanje nanočestica metalnih oksida na klinoptilolitu [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2012 [cited 2024 May 11] Available at: https://urn.nsk.hr/urn:nbn:hr:217:704618

T. Škrtić, "Antibakterijsko djelovanje nanočestica metalnih oksida na klinoptilolitu", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2012. Available at: https://urn.nsk.hr/urn:nbn:hr:217:704618

Metadata
TitleAntibakterijsko djelovanje nanočestica metalnih oksida na klinoptilolitu
Title (english)Antibacterial activity of metal oxide nanoparticles deposited onto clinoptilolite
AuthorTea Škrtić
MentorJasna Hrenović (mentor)
Committee memberJasna Hrenović (predsjednik povjerenstva)
Committee memberJasna Lajtner (član povjerenstva)
Committee memberBožena Mitić (član povjerenstva)
Committee memberMladen Kerovec (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Biology)
Zagreb
Defense date and country2012-05-23, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Biology
Abstract
Zeoliti su prirodni minerali koji se istražuju u svrhu smanjenja raznih oblika onečišćenja. Sorbiraju ione teških metala iz vodenih otopina, te nastaje produkt koji ima antibakterijsko djelovanje. Ispitan je učinak prirodnog zeolita na bakterije E. coli, te nanočestica Cu2O i ZnO deponiranih na zeolitu na čistu kulturu i na nativne populacije bakterija E. coli. Pokusi su izvođeni u autoklaviranom sekundarnom efluentu iz uređaja za biološko pročišćavanje otpadne vode. Prirodni zeolit nema antibakterijsko djelovanje već imobilizira bakterije na svojoj površini (1,83±1,99 x 107 CFU/g), no nanočestice metalnih oksida imaju dobro antibakterijsko djelovanje na E. coli. Nanočestice Cu2O imaju bolju antibakterijsku aktivnost od nanočestica ZnO. Bolja antibakterijska aktivnost utvrđena je na nativnim populacijama (nakon 1 sata obje vrste nanočestica postižu 100% inhibicije i zadržavaju ju i nakon 24 sata) nego na čistim kulturama bakterija (nakon 24 sata nanočestice Cu2O inhibiraju 87,24% bakterija, a nanočestice ZnO 53,72% bakterija). Zeolit se u svrhu pročišćavanja otpadnih voda može koristiti 5 dana nakon čega značajno gubi antibakterijska svojstva.
Abstract (english)
Zeolites are natural minerals that are widely investigated in the reduction of various forms of pollution. Zeolites sorb heavy metal ions from aqueous solution and form a product that has an antibacterial effect. We examined the effect of natural zeolite in E. coli, and Cu2O and ZnO nanoparticles deposited onto the zeolite in pure culture and in the native populations of the bacteria E. coli. Experiments were performed in autoclaved secondary effluent from the biological wastewater treatment plant. Natural zeolite has no antibacterial activity, but immobilizes bacteria on its surface (1,83±1,99 x 107 CFU/g), whereas metal oxide nanoparticles have good antibacterial activity on E. coli. Cu2O nanoparticles have better antibacterial activity than ZnO nanoparticles. Better antibacterial activity was found in native populations (after 1 hour both types of nanoparticles reached 100% inhibition and retain it also after 24 hours) than on pure cultures of bacteria (after 24 hours of Cu2O nanoparticles inhibited 87.24% of bacteria, and ZnO nanoparticles 53.72% of bacteria). Zeolite in wastewater treatment can be used for 5 days after which it loses antibacterial properties.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:704618
Study programmeTitle: Ecology
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra ekologije i zaštite prirode (magistar/magistra ekologije i zaštite prirode)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
Terms of useLicence In copyright icon
Created on2017-05-02 11:49:01