Fotokatalitička razgradnja 17β-estradiola u vodi solar/TiO2–FeZSM5/H2O2 procesom

undergraduate thesis

• Title (english): Photocatalytic degradation of 17β-estradiol in water by solar/TiO2-FeZSM5/H2O2 process
• Author: Barbara Kalebić
• Mentor: Hrvoje Kušić (mentor)
• Committee member: Hrvoje Kušić (predsjednik povjerenstva)
• Committee member: Ana Lončarić Božić (član povjerenstva)
• Committee member: Šime Ukić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2016-09-23, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract

Danas je uporaba farmaceutskih proizvoda sve raširenija. Kako se farmaceutici djelomično razgrađuju u ljudskom i životinjskom organizmu, njihova koncentracija u okolišu raste i tako predstavljaju opasnost po okoliš, ali i ljude. Estrogen 17β-estradiol (E2) spoj je koji utječe na promjenu endokrinog sustava živih organizama i time je nepoželjan u okolišu. Iz tog razloga Europska Unija svrstala ga je na listu spojeva s potencijalno štetnim djelovanjem koji trebaju biti praćeni u okolišu. Trenutne tehnologije obrade otpadne vode nisu u mogućnosti učinkovito uklanjati farmacetuska mikroonečišćivala, odnosno najnovije prioritetne tvari stoga je potrebno razviti nove metode obrade. Moguća alternativa ili nadopuna konvencionalnim metodama obrade su napredni oksidacijski procesi na čijem se razvoju danas sve više radi. Tako se u ovom radu procijenila moguća fotokatalitička razgradnja E2 u vodi solar/TiO2-FeZSM5/H2O2 procesom. Ispitivan je utjecaj odabranih procesnih parametara: početnog pH, koncentracije vodikovog peroksida i koncentracije katalizatora (zeolita ZSM5 tipa s izmijenjenim željezovim ionima, FeZSM5) na razgradnju E2. Prilikom određivanja optimalnih vrijednosti parametara procesa pri kojima će razgradnja biti najveća korišten je Box-Behnkenov faktorski plan eksperimenta s tri procesna parametra. Eksperimentom je pokazano da svi ispitivani procesni parametri utječu na brzinu razgradnje, no najznačajniji utjecaj ima udio FeZSM5 u istraživanom procesu. Određeni optimalni uvjeti su: optimalni udio FeZSM5 u katalizatoru je 33,36%, pH vrijednost 5,5 te [H2O2] = 50 mM pri kojima se postiže maksimalna brzina razgradnje 17β-estradiola.

Abstract (english)

Today people use more and more pharmaceutical products. Given that pharmaceuticals are partially dissolved in organisms of humans and animals, there concentration in the environment rises and poses a threat to it, but also for people. The compound estrogen 17β-estradiol (E2) causes changes in the endocrine systems of living organisms and is therefore undesirable to be found in the environment. Hence, the European Union listed the compound as potentially harmful and that it should be monitored din the environment. Current technologies for waste water treatment aren’t fully able to successfully remove pharmaceutical micro pollutants, or in other words the latest priority compounds, therefore new methods are needed. A possible alternative or supplement for conventional treatment methods are oxidation process on which more research is being conducted today. This article assesses the possibility of using photocatalytic degradation on E2 in water with a solar/TiO2-FeZSM5/H2O2 process. The effects of the proposed process were tested on these parameters: initial pH value, concentration of hydrogen peroxide and concentration of catalysts (zeolite ZSM5 type with interchangeable iron ions FeZSM5); to assess the degradation of E2. To determine the optimal values of parameters in the process by which the level of degradation will be at its highest, the Box-Behnken experiment design with process parameters. Experiments have shown that all examined process parameters affect the degradation kinetics but the amount of FeZSM5 proved to be the determining factor in the experimental process. The optimal conditions are as follows: the optimal amount of FeZSM5 in the catalyst is 33,36%, the pH value of the solution at 5,5 and [H2O2] = 50 mM. The aforementioned conditions achieve the highest degradation rate of 17β-estradiol.

• Keywords: farmaceutici; 17β-estradiol; napredni oksidacijski procesi; fotokataliza; statističko planiranje eksperimenta
• Keywords (english): pharmaceuticals; 17β-estradiol; advanced oxidation processes; photocatalysis; statistical experimental design
• Language: croatian
• URN:NBN: urn:nbn:hr:149:853608
• 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: 2018-02-16 13:18:18