Praćenje izabranih ksenobiotika tijekom procesa obrade otpadnih voda

master's thesis

• Title (english): Monitoring of selected xenobiotics during the wastewater treatment process
• Author: Dora Lastovčić
• Mentor: Danijela Ašperger (mentor)
• Committee member: Danijela Ašperger (predsjednik povjerenstva)
• Committee member: Šime Ukić (član povjerenstva)
• Committee member: Dragana Vuk (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2024-09-09, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

Ispuštanje obrađenih otpadnih voda u prirodne prihvatne vode završni je proces postrojenja za obradu otpadnih voda. Dokazano je da većina postojećih postrojenja za pročišćavanje otpadnih voda nisu dovoljno učinkovita u tretiranju brojnih ksenobiotika u otpadnoj vodi što u konačnici dovodi do njihovog ispuštanja u vodeni okoliš. Prema tome nužno je praćenje učinkovitosti uklanjanja ksenobiotika te razvoj novih i poboljšavanje postojećih procesa obrade otpadnih voda. Cilj ovog rada je praćenje uklanjanja pojedinačnih ksenobiotika naprednim oksidacijskim procesom fotolize uz dodatak H2O2 i detekcija/identifikacija njihovih eventualno nastalih razgradnih/transformacijskih produkata. Ispitivanje je provedeno pri tri različite pH-vrijednosti (pH = 4, 7 i 10) i tri koncentracije H2O2 (20, 50 i 100 mM). Uklanjanje otopina ksenobiotika koncentracije 10 mg/L provodilo se u Suntest CPS+ uređaju za simuliranje Sunčeve svjetlosti (UV-Vis) u trajanju od 300 min. Za praćenje uklanjanja i identifikaciju novih produkata koristile su se HPLC-DAD i LC-MS/MS instrumentalne analitičke metode. Ukupno je detektirano i identificirano šesnaest (16) novih produkata insekticida neonikotinoida, od kojih su po dosadašnjoj literaturi poznata samo tri (3) produkta acetamiprida. Ostali dobiveni produkti do sada nisu poznati prema literaturnom pregledu te su u ovom radu predložene strukturne formule četrnaest (14) od šesnaest (16) detektiranih novonastalih produkata acetamiprida, klotianidina i tiakloprida.

Abstract (english)

The discharge of treated wastewater into natural receiving waters is the final process in wastewater treatment plants. It has been proven that most existing wastewater treatment plants are not effective enough in treating numerous xenobiotics in wastewater, which ultimately leads to their release into the aquatic environment. Therefore, it is essential to monitor the effectiveness of xenobiotic removal and to develop new methods and improve existing wastewater treatment processes. The aim of this study is to monitor the removal of individual xenobiotics using an advanced oxidation process, photolysis with the addition of H2O2, and to detect/identify any degradation/transformation products that may form. The investigation was conducted at three different pH-values (pH = 4, 7, and 10) and three H2O2 concentrations (20, 50, and 100 mM). The removal of xenobiotic solutions at a concentration of 10 mg/L was carried out in a Suntest CPS+ device for simulating sunlight (UV-Vis) over a duration of 300 minutes. HPLC-DAD and LC-MS/MS instrumental analytical methods were used to monitor the removal and to identify new products. A total of sixteen (16) new products of neonicotinoid insecticides were detected and identified, of which only three (3) acetamiprid products are known in the current literature. The other resulting products have not been previously recognized according to the literature review, and in this paper, structural formulas for fourteen (14) out of sixteen (16) detected newly produced products of acetamiprid, clothianidin, and thiacloprid are proposed.

• Keywords: ksenobiotici; insekticidi; otpadne vode; HPLC-DAD; LC-MS/MS
• Keywords (english): xenobiotics; insecticides; wastewater; HPLC-DAD; LC-MS/MS
• Language: croatian
• URN:NBN: urn:nbn:hr:149:811430
• Project: Number: MYP-G6087; Title: Oporaba vode i membranski separacijski procesi za pouzdanu i održivu opskrbu vodom; Title: Water Reuse and Membrane Separation Processes for a Reliable and Sustainable Water Supply; Acronym: WaRMem; Leader: Davor Dolar; Jurisdiction: Belgium; Funder: Organizacija Sjevernoatlantskog sporazuma; Funding stream: Science for Peace and Security
• Study programme: Title: Applied Chemistry - Graduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry; Course: Environmental chemistry and green technologies; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra primijenjene kemije (sveučilišni/a magistar/magistra primijenjene kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2025-09-01
• Created on: 2024-09-24 11:18:32