Uklanjanje starenih i nestarenih čestica mikroplastike primjenom ferata(VI) iz vode

master's thesis

• Title (english): Removal of microplastic particles using ferrate (VI) from water
• Author: Ivana Runjak
• Mentor: Marin Kovačić (mentor)
• Committee member: Zvonimir Katančić (predsjednik povjerenstva)
• Committee member: Ana Vrsalović Presečki (član povjerenstva)
• Committee member: Vladimir Dananić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2023-09-25, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Plastika se najčešće odlikuje visokom stabilnosti, trajnosti i niskom cijenom proizvodnje. Postala je sveprisutna u okolišu kao posljedica masovne proizvodnje i lošeg gospodarenja otpadom. Mikroplastika nastaje kroz fizičku, kemijsku i biološku degradaciju većih komada plastike u okolišu. Mikroplastiku karakterizira velika kemijska stabilnost u okolišu, mogućnost daljnje fragmentacije u nanoplastiku i sposobnost adsorpcije drugih onečišćivala, kao i potencijal za bioakumulaciju. Otpadne vode sadrže mikroplastiku i nepoznate količine nanoplastike koje ne mogu biti u potpunosti uklonjene. Studije efikasnosti uklanjanja mikroplastike u početnoj su fazi zbog nedostatka standardnih protokola kvantifikacije mikroplastike u okolišnim matricama. Ferat je već dugo poznat kao svestran i multifunkcionalni reagens u obradi voda s mogućnošću pročišćavanja različitih vrsta zagađivača, ali nedostaci poput niske stabilnosti ograničavaju njegovu široku primjenu. U ovom radu provedeno je modelno starenje mikroplastike, te je ispitana mogućnost uklanjanja PET mikroplastike procesom koagulacije feratima iz vodene otopine u blago kiselom pH. Uzorci su karakterizirani FTIR spektrofotometrom, a masa istaložene mikroplastike određena je mjerenjem sadržaja organskog ugljika u filtratima uzoraka. Ferat se pokazao donekle primjenjivim za uklanjanje mikroplastike, međutim potrebno je ispitati učinkovitost uklanjanja u širem rasponu pH te kvantificirati udio nanoplastike.

Abstract (english)

Plastics are often characterized by high stability, durability and low production cost. It has become ubiquitous in the environment as a result of mass production and poor waste management. Microplastics form through the physical, chemical and biological degradation of larger plastic pieces in the environment. Microplastics are highly stable in the environment, have a high potential towards further fragmentation to nanoplastics and are able to adsorb other contaminants, as well as they have a potential for bioaccumulation. Wastewater contains microplastics and unknown amounts of nanoplastics that are difficult to remove entirely. Studies on the efficiency of microplastic removal are in the initial phase due to the lack of standard protocols for the quantification of microplastics in environmental matrices. Ferrate has been known for long as a versatile and multifunctional reagent in water treatment with the ability to purify various types of pollutants, but disadvantages such as low stability limited its wide application. Herein the environmental aging of microplastics, the methods of detection and microplastics removal, and the removal of UV-aged and non-aged PET microplastics particles by the process of ferrate coagulation from an aqueous solution in a low acidic pH. The samples were characterized by FTIR spectrophotometry, the mass of precipitated microplastic was measured by determining the organic carbon content.

• Keywords: ferat; mikroplastika; uklanjanje; koagulacija; oksidacija
• Keywords (english): ferrate; microplastics; removal; coagulation; oxidation
• Language: croatian
• URN:NBN: urn:nbn:hr:149:770317
• Project: Number: IP-2020-02-6033; Title: Mikroplastika u vodi; sudbina, ponašanje i uklanjanje; Title: Microplastics in water; fate and behavior and removal; Acronym: ReMiCRO; Leader: Ana Lončarić Božić; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• 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: 2025-01-06
• Created on: 2023-11-21 12:57:33