Fotokatalitička razgradnja mikroonečišćivala u površinskim vodama u pilot reaktoru primjenom sunčevog zračenja

master's thesis

• Title (english): The photocatalytic degradation of micropollutants in surface water using pilot reactor and solar radiation
• Author: Mihaela Mrazović
• Mentor: Ivana Grčić (mentor)
• Committee member: Sanja Kovač (predsjednik povjerenstva)
• Committee member: Ivana Grčić (član povjerenstva)
• Committee member: Jelena Loborec (član povjerenstva)
• Committee member: Hrvoje Meaški (član povjerenstva)
• Granter: University of Zagreb; Faculty of Geotechnical Engineering; Varaždin
• Defense date and country: 2023-07-21, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract

Fotokatalitička razgradnja mikroonečišćivala u površinskim vodama je inovativna
metoda koja se primjenjuje uz korištenje sunčevog zračenja u pilot reaktoru. Ovaj
postupak se koristi za uklanjanje mikroonečišćivala, kao što su lijekovi, kozmetički
proizvodi, pesticidi i drugi štetni spojevi koji se mogu naći u vodama. U pilot reaktoru,
katalizatori se koriste za poticanje fotokemijskih reakcija koje dovode do razgradnje
mikroonečišćivala. Sunčeva svjetlost se koristi kao izvor energije za aktiviranje
katalizatora, što rezultira proizvodnjom radikala koji razgrađuju mikroonečišćivala u
manje štetne tvari. Ovaj postupak može biti ekološki prihvatljiv, jer se oslanja na
obnovljiv izvor energije i može smanjiti potrebu za upotrebom kemijskih spojeva za
obradu voda. Međutim, uspješnost fotokatalitičke razgradnje mikroonečišćivala ovisi o
mnogim faktorima, kao što su vrsta katalizatora, intenzitet sunčevog zračenja, pH
vrijednost vode, prisustvo drugih spojeva u vodi i trajanje postupka. Stoga, optimizacija
uvjeta reakcije i istraživanje učinkovitosti postupka su važni aspekti istraživanja u ovom
području. U ovom radu, prisutnost PFOS-a (perfluorooktansulfonska kiselina) utvrđena
je na dvije različite lokacije površinskih voda (4 ppb) te je istraživana fotokatalitička
razgradnja PFOS-a (C0=1 ppm) u pilot reaktoru s različitim fotokatalizatorima pod
prirodnim sunčevim zračenjem. Trenutno istraživanje pokazuje da je upotreba titan
dioksida na mreži od staklenih vlakana najperspektivnija metoda za razgradnju PFOS-a.
Međutim, kako bi se ova metoda primijenila u stvarnim uvjetima, potrebna su daljnja
istraživanja koja će se fokusirati na niže koncentracije PFOS-a kako bi se procijenila
njena učinkovitost i primjenjivost.

Abstract (english)

Photocatalytic degradation of micropollutants in surface waters in a pilot reactor using
solar irradiation is an innovative method used for the removal of micropollutants such as
drugs, cosmetics, pesticides, and other harmful compounds that may be found in waters.
In the pilot reactor, catalysts are used to promote photocatalytic reactions that lead to the
degradation of micropollutants. Sunlight is used as a source of energy to activate the
photocatalysts, resulting in the production of reactive oxygen species that degrade
micropollutants into less harmful substances. This process can be environmentally
friendly as it relies on a renewable energy source and can reduce the need for chemical
compounds for water treatment. However, the success of the photocatalytic degradation
of micropollutants depends on many factors, such as the type of catalyst, the intensity of
solar radiation, the pH value of the water, the presence of other compounds in the water,
and the duration of the process. Therefore, optimizing the reaction conditions and
investigating the efficiency of the process are important aspects of research in this field.
In this work, the presence of PFOS (Perfluorooctanesulfonic acid) was determined in two
different locations of surface water (4 ppb) and the photocatalytic degradation of PFOS
(C0=1 ppm) was investigated in a pilot reactor with different photocatalysts under natural
solar radiation. Current research indicates that the use of titanium dioxide on a glass fiber
mesh is the most promising method for PFOS degradation. However, in order to apply
this method in real-world conditions, further research focusing on lower concentrations
of PFOS is needed to assess its effectiveness and applicability.

• Keywords: površinske vode; mikroonečišćivala; fotokataliza; PFOS.
• Keywords (english): surface waters; micropollutants; photocatalysis; PFOS.
• Language: croatian
• URN:NBN: urn:nbn:hr:130:108018
• Study programme: Title: Geoenvironmental Engineering; specializations in: Geoenvironmental Engineering, Environmental Management, Water Management; Course: Environmental Management; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka inženjerstva okoliša (sveučilišni/a magistar/magistra inženjer/inženjerka inženjerstva okoliša)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to authenticated users
• Created on: 2024-02-13 10:09:04