Razvoj i validacija mehanističkih modela razgradnje prioritetnih onečišćivala UV-C/S2O82- procesom

master's thesis

• Title (english): Development and validation of mechanistic models for degradation of priority pollutants by UV-C/S2O82- processes
• Author: Silvia Morović
• 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: 2018-09-26, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract

Razvoj farmaceutske i agroindustrije, odnosno svakodnevno korištenje različitih farmaceutika i pesticida dovodi do onečišćenja površinskih i podzemnih voda čime se javljaju negativne posljedice za vodeni ekosustav i ljudsko zdravlje. Okvirnom direktivom o vodama donesena je strategija protiv onečišćenja voda koja sadrži listu prioritetnih tvari koje predstavljaju znatan rizik za vodeni okoliš. Konvencionalne metode obrade voda neučinkovite su za uklanjanje prioritetnih tvari, stoga se kao alternativno rješenje nameću napredni oksidacijski procesi (NOP) čija glavna prednost proizlazi iz činjenice da su to razgradni i relativno jeftini procesi vrlo visoke učinkovitosti kojima je cilj mineralizacija organskih tvari do CO2, H2O ili razgradnja do jednostavnijih, relativno bezopasnih, anorganskih produkata. Kroz brojna istraživanja NOP su uglavnom pokazali visoku učinkovitost uklanjanja onečišćujućih tvari u vodama, uslijed čega sve više raste interes za njihovom primjenom. Svrha ovog rada je izrada poluempirijskog matematičko - mehanističkog modela (MM) za opis kemizma procesa razgradnje pojedinih farmaceutika (deksametazon, diklofenak, oksitetraciklin, eritromicin, azitromicin i karbamazepin) i pesticida (alaklor, klorfenvinfos, izoproturon i diuron) u vodi kako bi se maksimizirala učinkovitost pročišćavanja otpadnih voda i koji se potom može koristiti za studije procjene rizika. Za razgradnju odabranih prioritetnih tvari korišten je UV-C/S2O82− fotooksidacijski proces. Prilikom provođenja eksperimenata praćeni su pH, koncentracija oksidansa, stupanj mineralizacije i konverzija. Utvrđeno je kako je koncentracija oksidansa bitan parametar te se UV-C/S2O82− fotooksidacijski proces može odvijati u širokom rasponu pH bez znatnog utjecaja na kinetiku mineralizacije. Razvijeni mehanistički modeli dobro opisuju konverzije pesticida i farmaceutika, mineralizaciju te potrošnju oksidansa uz srednje kvadratno odstupanje MM od eksperimentalnih podataka <1,5.

Abstract (english)

With the development of the pharmaceutical industry and the agribusiness came the excessive use of pharmaceutics and pesticides, which led to the polution of surface and underground waters with negative consequences to the ecosystem and public health. The Water Framework Directive, adopted in 2013. in the European Union, contains a list of priority substances that pose threats to the aquatic enviroment as well as a strategy on how to contain them. Conventional methods of water treatment have proven inadequate for effective removal of priority substances, therefore as an alternative, advanced oxidation procesess (NOP) have emerged. NOP are low cost processes and their main advantage lies in their capability to provide complete degradation/mineralization of majority of organics in water to CO2 and H2O or degradation to less hazardous or inorganic products. After numerous research, NOP has shown to be a highly succsessful aquatic pollutant removal tool and as a result the interest for it's application increases. The purpose of this paper is the creation of a semi-empiric mathematical-mechanistic model (MM) which will be used to describe the degradation of certain pharmaceutics (dexamethasone, diclofenac, oxytetracycline, erythromycin, azithromycin and carbamazepine) and pesticides (alachlor, chlorfenvinphos, diuron and isoproturon) in water and maximizing the efficiency of purification of wastewater in hope of using it's results in risk assessments. For the degradation of priority substances the UV-C/S2O82− photo-oxidation process has been used. During the experiment the following parameters have been monitored: pH changes, oxidant consumption, mineralization and conversion. Prediction of process responses were successfully achieved by MM and predicted data have deviated from the experimental data <1,5.

• Keywords: prioritetne tvari; nova onečišćivala; farmaceutici; pesticidi; napredni oksidacijski procesi; sulfatni radikal; mehanističko modeliranje
• Keywords (english): priority substances; emerging contaminants; pharmaceuticals; pesticides; advanced oxidation processes; sulphate radical; mechanistic modeling
• Language: croatian
• URN:NBN: urn:nbn:hr:149:798777
• 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: 2020-10-27 12:05:39