Title Utjecaj naprednih oksidacijskih procesa na ekotoksičnost Title (english) The influence of advanced oxidation processes on ecotoxicity Author Annetta Peršić Mentor Danijela Ašperger (mentor)Committee member Danijela Ašperger (predsjednik povjerenstva)Committee member Davor Dolar (član povjerenstva)Committee member Kristina Tolić Čop (član povjerenstva)Granter University of Zagreb Defense date and country 2024-09-30, Croatia Scientific / art field, NATURAL SCIENCES Abstract Praćenje ekotoksičnosti tijekom naprednih oksidacijskih procesa u obradi vode igra ključnu ulogu za očuvanje okoliša te u osiguravanju kvalitete vode za potrošnju. Napredni oksidacijski procesi, poput ozonizacije, UV/zračenja ili naprednih oksidacijskih postupaka s kisikom ili vodikovim peroksidom, sve su češće korišteni radi uklanjanja organskih onečišćenja iz vode. Međutim, ti procesi mogu generirati nusprodukte koji su toksični i mogu predstavljati potencijalnu prijetnju zdravlju ljudi. Stoga je praćenje ekotoksičnosti ključno kako bi se identificirali potencijalno štetni spojevi koji se formiraju tijekom ovih procesa. Cilj ovoga rada bio je ispitati ekotoksičnost prije i nakon uklanjanja izabranih ksenobiotika iz vode primjenomnaprednog oksidacijskog procesa fotolize uz dodatak vodikovog peroksida kao tehnologije u obradi voda. Izabrani ksenobiotici nalaze se u skupini anthelmintika (albendazol, febantel i mebendazol), te u skupini pesticida (acetamiprid, kloianidin i tiakloprid). Ispitivanja su se provodila pri pH-vrijednosti 4 i tri različite koncentracije vodikovog peroksida (20, 50 i 100 mM). Fotoliza otopina ksenobiotika koncentracije 10 mg L^-1 provodila se u Suntest CPS+ uređaju za simuliranje Sunčeve svjetlosti (UV/VIS), a pojedina se otopina fotolizirala u tri različita vremena (60, 180 i 300 min). Ekotoksičnost je ispitivana prema standardnoj metodi ISO 11348 – 3:2007 primjenom luminiscentne bakterije Vibrio fischeri. Rezultati ukazuju na sljedeći poredak ekotoksičnosti standardnih otopina ispitivanih ksenobiotika: acetamiprid>febantel>tiakloprid>klotianidin>albendazol>mebendazol. Smjese razgradnih produkata albendazola, febantela i mebendazola nisu pokazali znakove ekotoksičnosti. Oksidacijski proces UV/H2O2 pri ispitivanim koncentracijama pokazao se učinkovitim u razgradnji ovih anthelmintika bez ekotoksičnih nusprodukata. Acetamiprid, klotianidin i tiakloprid daju ekotoksične razgradne produkte, no u konačnici su se pri najvišoj koncentraciji oksidansa i najduljem vremenu izlaganja iste uklonile. Najekotoksičnije smjese produkata pokazao je klotianidin, potom acetamiprid te tiakloprid.
Abstract (english) Ecotoxicity monitoring during advanced oxidation processes in water treatment plays a key role in protecting the environment and in ensuring the quality of water for consumption. Advanced oxidation processes, such as ozonation, UV/irradiation, or advanced oxidation processes with oxygen or hydrogen peroxide, have increasingly been used to remove organic contaminants from water. However, these processes can generate byproducts that are toxic and can pose a potential threat to human health. Therefore, toxicity monitoring is essential to identify potentially harmful compounds that are formed during these processes. The aim of this study was to investigate the ecotoxicity before and after the removal of selected xenobiotics from water using an advanced oxidation process, photolysis with the addition of hydrogen peroxide, as a water treatment technology. The selected xenobiotics belong to the group of anthelmintics (albendazole, febantel, and mebendazole) and the group of pesticides (acetamiprid, clothianidin, and thiacloprid). The experiments were conducted at a pH value of 4 and with three different concentrations of hydrogen peroxide (20, 50, and 100 mM). The photolysis of xenobiotic solutions at a concentration of
10 mg L^-1 was carried out in the Suntest CPS+ device for simulating sunlight (UV-VIS), with each solution being photolyzed for three different durations (60, 180, and 300 min). The ecotoxicity was assessed according to the standard method ISO 11348 – 3:2007 using the luminescent bacteria Vibrio fischeri. Results indicate the following order of ecotoxicity of the tested xenobiotic standard solutions: acetamiprid>febantel>thiacloprid>clothianidin>albendazole>mebendazole. The degradation product mixtures of albendazole, febantel, and mebendazole showed no signs of ecotoxicity. The UV/ H2O2 oxidation process at the tested concentrations proved effective in degrading these anthelmintics without producing ecotoxic by-products. Acetamiprid, clothianidin, and thiacloprid produce ecotoxic degradation products, but these were ultimately removed at the highest oxidant concentration and longest exposure time. The most ecotoxic mixtures of degradation products were shown by clothianidin, followed by acetamiprid and thiacloprid.
Keywords
ksenobiotici
ekotoksičnost
Vibrio fischeri
napredni oksidacijski procesi
vodikov peroksid
obrada vode
Keywords (english)
xenobiotics
ecotoxicity
Vibrio fischeri
advanced oxidation processes
hydrogen peroxide
water treatment
Language croatian URN:NBN urn:nbn:hr:149:116968 Project Number: MYP-G6087 Study programme Title: Applied Chemistry - Graduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry Type of resource Text File origin Born digital Access conditions Embargoed access Terms of use Created on 2024-11-07 13:08:15
