Uklanjanje diklofenaka imobiliziranim nano-TiO2 pod simuliranim Sunčevim zračenjem

undergraduate thesis

• Title (english): Removal of diclofenac by immobilized nano-TiO2 under simulated solar irradiation
• Author: Lora Hariri
• Mentor: Ana Lončarić Božić (mentor)
• Committee member: Ana Lončarić Božić (predsjednik povjerenstva)
• Committee member: Hrvoje Kušić (član povjerenstva)
• Committee member: Šime Ukić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2017-09-18, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract

Onečišćenje vode predstavlja jedno od najvećih prijetnji zdravlju ljudi te njegovo rješavanje veliki izazov. Opće je poznato kako su brojne bolesti prouzročene vodom neadekvatne kvalitete. Stoga su znatni napori usmjereni identificiranju i rješavanju uzroka tog problema. Sve veća prijetnja su mikroonečišćivala u vodi, koja se ne uspijevaju u znatnoj mjeri ukloniti u konvencionalnim postrojenjima za obradu otpadnih voda. Među njima poznato je kako farmaceutik diklofenak (DCF) ima negativan učinak a detektiran je u brojnim vodama. Napredni oksidacijski procesi (engl. Advanced Oxidation Processes, AOPs) su potencijalno rješenje problema, zahvaljujući neselektivnoj, izuzetno reaktivnoj prirodi hidroksilnih radikala na kojima se temelje. Jedan od perspektivnih AOP-a je fotokataliza, a jedan od najkorištenijih fotokatalizatora općenito je Aeroxide (Degussa) P25 TiO2. U ovome radu istražen je utjecaj matrice, sastavljene od anorganskih soli i soli huminskih kiselina, na učinkovitost razgradnje DCF-a u solar/TiO2 P25/H2O2 procesu. Ustanovljeno je kako matrica nema značajniji utjecaj na uklanjanje DCF-a i ukupnog organskog ugljika te procesu odgovaraju istovjetni uvjeti kao i bez matrice (pH 4 te [H2O2] = 5 mM). Međutim u daljnjim istraživanjima potrebno je razlučiti potencijalnu adsorpciju DCF-a na koloide huminskih kiselina pri niskim pH i provesti istraživanje konverzije DCF-a u procesu.

Abstract (english)

Water pollution is a significant threat to the health of people and a large technological challenge. It is very well known that many illnesses are caused by poor water quality. Significant efforts are invested in order to identify and solve the cause of pollution issues. A growing threat are micropollutants in water. Micropollutants aren't adequately removed in current wastewater treatment technologies. A common micropollutant is diclofenac, a widely used pharmaceutical which has a negative impact on the environment. Advanced oxidation processes (AOPs) are a potential solution for the issue of micropollutant contaminantion, thanks to the unselective, highly reactive nature of the hydroxyl radical on which they are based upon. Photocatalysis is a promising AOP for future applications. A common photocatalyst is Aeroxide (Degussa) P25. The aim of this work was to study the influence of the water matrix, composed of inorganic salts and salts of humic acids, on diclofenac degradation in the solar/TiO2 P25/H2O2 process. The water matrix didn't adversely impact the removal of DCF. Optimal conditions remained the same as in the case of sole DCF degradation. Optimal conditions for DCF removal are pH 4 and [H2O2] = 5 mM. Further studies should elucidate the impact of potential DCF adsorption on colloidal humic acid clusters and investigate DCF conversion.

• Keywords: fotokataliza; diklofenak; Aeroxide P25; utjecaj matrice
• Keywords (english): photocatalysis; diclofenac; Aeroxide P25; matrix influence
• Language: croatian
• URN:NBN: urn:nbn:hr:149:630814
• Study programme: Title: Environmental Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka ekoinženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka ekoinženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-03-12 11:29:19