Utjecaj izvora zračenja za fotorazgradnju organskih onečišćivala

undergraduate thesis

• Title (english): Influence of radiation sources for the photodegradation of organic pollutants
• Author: Ivor Grković
• Mentor: Vanja Kosar (mentor)
• Committee member: Vanja Kosar (predsjednik povjerenstva)
• Committee member: Domagoj Vrsaljko (član povjerenstva)
• Committee member: Filip Car (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2024-09-19, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Onečišćenje okoliša odnosi se na unošenje stranih tvari, poznatih kao zagađivači, u okoliš u krutom, tekućem ili plinovitom obliku, bilo izravno ili neizravno. Ti zagađivači mogu postojati u koncentracijama koje predstavljaju rizik za ljudsko zdravlje i dobrobit drugih živih organizama. Osim toga, onečišćenje može dovesti do propadanja materijalnih dobara i pada kvalitete okoliša, utječući tijekom vremena na zrak, vodu, tlo i kulturnu baštinu. Fotokataliza ili fotokatalitička oksidacija predstavlja naprednu oksidacijsku tehniku koja se koristi za razgradnju i eliminaciju različitih zagađivača prisutnih u zraku i vodi. Ovaj proces koristi poluvodič kao katalizator, kisik kao oksidacijsko sredstvo i svjetlosno zračenje - ultraljubičaste zrake ili prirodno svjetlo - kao izvor energije koji aktivira katalizator. Na učinkovitost fotokatalitičke reakcije uvelike utječu valna duljina svjetlosne energije (fotona) i svojstva katalizatora. Tipično, poluvodiči se biraju kao katalizatori zbog svojih elektroničkih struktura osjetljivih na svjetlost, karakteriziranih i valentnom (VB) i vodljivom vrpcom (CB).
Cilj završnog rada je prikazati utjecaj izvora zračenja za fotorazgradnju organskih onečišćivala.

Abstract (english)

Environmental pollution refers to the introduction of foreign substances, known as pollutants, into the environment in solid, liquid or gaseous form, either directly or indirectly. These pollutants can exist in concentrations that pose a risk to human health and the well-being of other living organisms. In addition, pollution can lead to the deterioration of material goods and a decline in the quality of the environment, affecting over time air, water, soil and cultural heritage. Photocatalysis or photocatalytic oxidation is an advanced oxidation technique used to break down and eliminate various pollutants present in air and water. This process uses a semiconductor as a catalyst, oxygen as an oxidizing agent, and light radiation—ultraviolet rays or natural light—as the energy source that activates the catalyst. The efficiency of the photocatalytic reaction is greatly influenced by the wavelength of light energy (photons) and the properties of the catalyst. Typically, semiconductors are chosen as catalysts because of their light-sensitive electronic structures characterized by both valence (VB) and conduction bands (CB).
The goal of the final paper is to show the influence of radiation sources for the photodegradation of organic pollutants.

• Keywords: organska onečišćavala; zračenje; fotokataliza
• Keywords (english): organic pollutants; radiation; photocatalysis
• Language: croatian
• URN:NBN: urn:nbn:hr:149:730157
• Study programme: Title: Applied Chemistry - Undergraduate 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: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-11-16 22:30:59