Fizikalno-kemijske interakcije farmaceutskih onečišćivala i TiO2 u vodenom mediju

master's thesis

• Title (english): Physico-chemical interactions of pharmaceutical pollutants and TiO2 in aqueous media
• Author: Matea Gavran
• Mentor: Marin Kovačić (mentor)
• Committee member: Marin Kovačić (predsjednik povjerenstva)
• Committee member: Zvonimir Katančić (član povjerenstva)
• Committee member: Marijana Kraljić Roković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2020-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Proizvodnje i konzumacija farmaceutiha te njihovi nedovoljno istraženi i nepoznati učinci na ekosustav izazivaju najviše pozornosti među znanstvenicima. Primjena fotokatalize u obradi organskih mikroonečišćivala u otpadnim vodama zanimljiva je alternativa konvencionalnim postupcima, a nužan proces u heterogenoj fotokatalizi je adsorpcija onečišćivala na površini fotokatalizatora. U ovome radu ispitana je adsorpcija dvaju potencijalnih mikroonečišćivala, amoksicilina (AMX-a) te diklofenaka (DCF) na titanijev dioksid (TiO2), jedan od najznačajnijih fotokalizatora. Empirijsko ispitivanje fizikalno-kemijskih interakcija vodenih otopina navedenih mikroonečišćivala obuhvaćalo je pH vrijednosti 4, 7 i 10 te masene koncentracije TiO2 kao adsorbensa od 0,4 g L^-1, 0,8 g L^-1 te 1,2 g L^-1 pri temperaturama od 15°C, 25 °C te 35 °C. Korišteni su linearizirani oblici Langmuirove i Freundlichove izoterme za opisivanje adsorpcijske ravnoteže. Empirijski rezultati općenito ukazuju na termodinamički nepovoljnu adsorpciju u ispitivanim sustavima te kako su interakcije fizikalnog karaktera.

Abstract (english)

The production and consumption of pharmaceuticals and their insufficiently researched and unknown effects on the ecosystem attract attention among scientists. The application of photocatalysis in the treatment of organic micro-pollutants in wastewaters is an interesting alternative to conventional processes. A necessary step in heterogeneous photocatalysis is the adsorption of contaminants on the surface of the photocatalyst. In this work, the adsorption of two potential micropollutants, amoxicillin (AMX) and diclofenac (DCF) on titanium dioxide (TiO2), one of the most important photocatalysts, was investigated. The empirical study of physicochemical interactions of aqueous solutions of these micro-pollutants included pH values of 4, 7 and 10 and a mass concentration of TiO2 as an adsorbent of 0.4 g L^-1, 0.8 g L^-1 and 1.2 g L^-1 at temperatures of 15 ° C, 25 ° C and 35 ° C. Linearized forms of the Langmuir and Freundlich isotherms were used to fit the adsorption equilibrium. Empirical results generally indicate thermodynamically unfavorable adsorption in the examined systems and physical character of the adsorption interactions.

• Keywords: adsorpcija; fotokatalizator; mikroonečišćivala; titanijev dioksid
• Keywords (english): adsorption; photocatalyst; micropollutants; titanium dioxide
• Language: croatian
• URN:NBN: urn:nbn:hr:149:111038
• Project: Number: IP-2018-01-1982; Title: Nano-katalizatori aktivirani Sunčevim zračenjem u tehnologijama zaštite okoliša; Title: Nano-sized solar-active catalysts for environmental technologies; Acronym: NaSCEnT; Leader: Hrvoje Kušić; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• Study programme: Title: Environmental Engineering - Graduate study; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka ekoinženjerstva (magistar/magistra inženjer/inženjerka ekoinženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2022-03-02 14:08:48