Ispitivanje fotokatalitičke razgradnje amoksicilina pomoću Fe2O3/TiO2 imobiliziranog na staklenoj podlozi

master's thesis

• Title (english): Investigation of photocatalytic removal of amoxicillin by Fe2O3/TiO2 immobilized on glass support
• Author: Ana-Marija Pitner
• Mentor: Hrvoje Kušić (mentor)
• Committee member: Hrvoje Kušić (predsjednik povjerenstva)
• Committee member: Marijana Kraljić Roković (član povjerenstva)
• Committee member: Dajana Kučić Grgić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2023-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences

Abstract

Prisutnost farmaceutika u vodenom okolišu negativno utječe na ekosustav te je potrebno pronaći efikasan način uklanjanja istih. Fotokatalitička razgradnja onečišćivala na poluvodičima je napredna oksidacijska tehnologija koja omogućuje potpunu mineralizaciju tvari. Uz prisutnost energije u obliku vidljive svjetlosti, fotokatalizator u vodenoj otopini generira radikalne vrste koje ulaze u procese oksidacije onečišćenja. U ovom radu ispitano je uklanjanje amoksicilina kao onečišćenja iz vodene otopine. Amoksicilin je farmaceutik koji se zbog prekomijernog korištenja akumulirao u okolišu i teško se uklanja. Fotokatalizator korišten za ispitivanje uklanjanja amoksicilina je kompozit Fe2O3 i TiO2 imobiliziran na stakleni nosač. Pripravljeni su fotokatalizatori različitog masenog udjela Fe2O3 (1%-20%), provedena je karakterizacija strukture fotokatalizatora XRD metodom, a zatim je ispitan utjecaj omjera njihovih masa na proces razgradnje amoksicilina. Kao najefikasniji, pokazao se 5% - Fe2O3/TiO2 koji nakon 3 900 minuta postiže 99% razgradnju amoksicilina. Kako bi se smanjilo vrijeme trajanja reakcije, isti eksperiment proveden je uz dodatak oksidansa peroksodisulfata. Za određivanje utjecaja razgradnih produkata na okoliš, proveden je test toksičnosti na bakteriji Vibrio fischeri.

Abstract (english)

The presence of pharmaceuticals in the aquatic environment negatively affects the ecosystem and it is necessary to find an efficient way to remove them. Photocatalytic degradation of pollutants on semiconductors is an advanced oxidation technology that enables complete mineralization of substances. Visible light can activate the photocatalyst in water solution and non-selective radicals are formed that are starting reaction of oxidation of amoxicillin. The photocatalyst used is a composite of Fe2O3 and TiO2 immobilized on a glass plate. Photocatalysts consist of a different mass fraction of Fe2O3 (1%-20%). Characterization of photocatalyst structures was carried out using the XRD method. Also, the influence of their mass ratio on the process of amoxicillin degradation was examined.
5% - Fe2O3/TiO2 is proved to be the most effective one. After 3900 minutes of reaction,
it converts 99% of amoxicilin. For reducing the duration of the reaction, the same experiment was carried out with the addition of peroxodisulfate as an oxidant. To determine the impact of degradation products on the environment, a toxicity test was tested on Vibrio fischeri.

• Keywords: obrada voda; farmaceutici; amoksicilin; fotokataliza; Fe2O3/TiO2
• Keywords (english): water treatment; pharmaceuticals; amoxicillin; photocatalysis; Fe2O3/TiO2
• Language: croatian
• URN:NBN: urn:nbn:hr:149:993189
• Project: Number: KK.01.1.1.04.0001; Title: Pročišćavanje vode i dobivanje energije korištenjem novih kompozitnih materijala uz Sunčevo zračenje; Acronym: PVDEKM; Leader: Hrvoje Kušić; Jurisdiction: eu; Funder: EC; Funding stream: KF
• Study programme: Title: 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 resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-11-24 11:40:09