Napredni oksidacijski procesi temeljeni na Fentonu u uklanjanju postojanih organskih onečišćivala

undergraduate thesis

• Title (english): Fenton-based processes for removal of persistent organic pollutants
• Author: Valentina Paradinović
• Mentor: Šime Ukić (mentor)
• Committee member: Šime Ukić (predsjednik povjerenstva)
• Committee member: Matija Cvetnić (član povjerenstva)
• Committee member: Dragana Vuk (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: NATURAL SCIENCES; Chemistry

Abstract

Postojana organska onečišćivala predstavljaju značajan okolišni problem jer se zbog svoje postojanosti u okolišu zadržavaju dugo, a imaju naglašen potencijal štetnog djelovanja na organizme. Fentonov proces, koji uključuje generiranje veoma reaktivnih hidroksilnih radikala korištenjem vodikovog peroksida i željeza, pokazao se učinkovitim u razgradnji postojanih organskih onečišćivala. U ovom radu dane su osnove Fentonova procesa te njegovih glavnih modifikacija: foto-Fentonova procesa i Fentonu sličnih procesa. Opisani su njihovi mehanizmi i uvjeti u kojima najpovoljnije djeluju. Optimalni uvjeti za Fentonov proces uključuju niske
pH vrijednosti (oko 3) dok Fentonu slični procesi dobro djeluju i u neutralnim uvjetima.
Foto-Fentonov proces je dodatno poboljšan prisutnošću UV svjetlosti koja ubrzava generiranje radikala. Navedeni su različiti primjeri primjene ovih naprednih oksidacijskih procesa u obradi onečišćenih voda. Istaknuto je kako se pozitivno djelovanje Fentonovih procesa ne očituje samo u smanjenju koncentracije organskih onečišćivala, nego i u poboljšavaju biorazgradivost tako tretiranih voda.

Abstract (english)

Persistent organic pollutants pose a significant environmental problem, as they remain in the environment for a long time due to their persistence and have a high hazard potential.
The Fenton process, which uses hydrogen peroxide and iron to generate highly reactive hydroxyl radicals, has proven to be effective in the degradation of persistent organic pollutants. This thesis presents the fundamentals of the Fenton process and its commonly used variants: the photo-Fenton process and Fenton-like processes. Their mechanisms and the conditions under which they are most efficient are described. Optimal conditions for the Fenton process are low pH values (around 3), while Fenton-like processes also work well under neutral conditions. The photo-Fenton process is enhanced by the presence of UV light, which increases the rate of radical formation. Several examples of the treatments of contaminated water by these advanced oxidation processes are given in this thesis. It has been pointed out that the positive effects of Fenton-based processes are not only in reducing the concentration of organic pollutants, but also in improving the biodegradability of such treated waters.

• Keywords: postojana organska onečišćivala; obrada voda; napredni procesi oksidacije; Fenton
• Keywords (english): persistent organic pollutants; water treatment; advanced oxidation processes; Fenton
• Language: croatian
• URN:NBN: urn:nbn:hr:149:947142
• Project: Number: IP-2022-10-2822; Title: Okolišni aspekti SARS-CoV-2 antivirotika; Title: Environmental Aspects of SARS-CoV-2 Antiviral Substances; Acronym: EnA-SARS; Leader: Šime Ukić; Jurisdiction: Croatia; Funder: Hrvatska zaklada za znanost; Funding stream: Research Projects
• 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 23:34:51