Primjena ferata (VI) za uklanjanje prioritetnih tvari u vodi

undergraduate thesis

• Title (english): Application of ferrates (VI) for removal of priority substances in water
• Author: Stefani Majdandžić
• Mentor: Ana Lončarić Božić (mentor)
• Committee member: Ana Lončarić Božić (predsjednik povjerenstva)
• Committee member: Hrvoje Kušić (član povjerenstva)
• Committee member: Tomislav Bolanča (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2018-09-10, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract

Onečišćenje voda organskim, anorganskim tvarima ili mikroorganizmima sve je veći problem. Listom prioritetnih tvari u vodama obuhvaćena su neka od tzv. novih onečišćivala u koje se ubrajaju i farmaceutici. Uobičajeni komunalni sustav za obradu otpadnih voda nije adekvatan za uklanjanje takvih komponenata budući da je detektirana njihova prisutnost i nakon procesa obrade. Stoga se u posljednje vrijeme ubrzano radi na istraživanju novih metoda pročišćavanja otpadnih voda. Jedna od metoda je kemijska oksidacija upotrebom novih oksidacijskih sredstava kao što su ferati (VI), odnosno željezo višeg oksidacijskog stanja. Cilj ovog rada je ispitati mogućnost primjene ferata (VI), K2FeO4, za uklanjanje farmaceutika iz otpadnih voda. Istražen je utjecaj pH i masene koncentracije ferata (VI) na učinkovitost uklanjanja karbamazepina iz vode provedbom procesa u šaržnom reaktoru uz korištenje Dizajna eksperimenta. Promjene koncentracije karbamazepina tijekom procesa obrade praćene su visoko djelotvornom tekućinskom kromatografijom. U uzorku karbamazepina sa feratima (VI), pri optimalnim uvjetima, određene su nečistoće zaostale nakon procesa obrade i fizikalno-kemijski pokazatelji: kemijska potrošnja kisika, KPK, ukupni organski ugljik, UOU. U ovom radu postignuto je maksimalno uklanjanje karbamazepina od 32,3 % u ispitivanom području procesnih parametara. Ustanovljeno je da su pH vrijednost i masena koncentracija ferata gotovo jednako utjecajni parametri procesa. Pritom je optimalna vrijednost pH iznosila 5, a koncentracija ferata (VI) 75 mg/L.

Abstract (english)

Water pollution, either organic, anorganic or by microorganisms is a growing problem. Also, the problem is a group of so called emerging pollutants and Priority Substances (that contain some emerging pollutants on the list), which includes pharmaceuticals. Standard waste water treatment plant (WWTP) is not adequate in terms of removal that kind of components from water, since pharmaceuticals have been detected in water even after certain kind of treatment. Hence, lately a lot of effort has been put on an investigation and developing new methods for waste water purification. One important method is chemical oxidation with some novel chemical agents, such as ferrates (VI), i.e. iron in higher oxidation state. The aim of this study was to investigate possibility of application ferrates (VI), K2FeO4, for removal of pharmaceuticals from waste water. Impact od pH value and concentration of ferrates (VI) on removal efficiency of carbamazepine from water was investigated during the proces in batch reactor with Design of Experiments and Response Surface Methodology. Concentration of carbamazepine during the process was monitored by high performance liquid chromatography. Impurities left behind after the process in a sample of carbamazepine with ferrates (VI) at optimal conditions and physico-chemical indicators such as Chemical oxigen demand, COD, and Total organic carbon, TOC, were determined. In this paper, removal rate of carbmazepine around 32,3 % is achieved. It is estimated that the pH value of solution and the concentration of ferrates (VI) have almost even level of importance and influence for the process, while the optimal pH value is 5 and concentration of ferrates (VI) is 75 mg/L.

• Keywords: obrada voda; ferati (VI); farmaceutici; karbamazepin; metoda odzivnih površina
• Keywords (english): water treatment; ferrates (VI); pharmaceuticals; carbamazepine; response surface methodology (RSM)
• Language: croatian
• URN:NBN: urn:nbn:hr:149:875979
• 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: Closed access
• Created on: 2021-06-24 13:12:56