Razgradnja benzil butil ftalata pod utjecajem elektromagnetskog zračenja

master's thesis

• Title (english): Degradation of benzyl butyl phthalate by electromagnetic radiation
• Author: Hana Duhaček
• Mentor: Šime Ukić (mentor)
• Committee member: Šime Ukić (predsjednik povjerenstva)
• Committee member: Dajana Kučić Grgić (član povjerenstva)
• Committee member: Matija Cvetnić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2022-02-24, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

Zadatak ovog rada bio je ispitati optimalne uvjete za provedbu eksperimenata razgradnje otopine benzil butil ftalata u vodi korištenjem nekoliko vrsta elektromagnetskog zračenja: UV zračenje, mikrovalno zračenje i ultrazvučno zračenje. Stupanj razgradnje odabranog ftalata djelovanjem pojedinog elektromagnetskog zračenja određen je pomoću analize tekućinskom kromatografijom visoke djelotvornosti (engl. high performance liquid chromatography, HPLC). Benzil butil ftalat (BBP) predstavlja sintetski proizveden ester ftalata. U samom procesu proizvodnje plastičnog proizvoda koji sadrži BBP, on se nanosi kao vanjski plastifikator i ima tendenciju migrirati s te površine pri čemu postaje onečišćujuća tvar u okolišu. Zbog toga dolazi do dugotrajne prisutnost BBP-a u svim dijelovima okoliša (voda, tlo, zrak, sediment, mulj i sl.), pa je posebno važno uočiti i znati njegove učinke na ljudsko zdravlje i ekosustav. Prema porastu učinkovitosti razgradnje BBP-a kao najbolje rješenje pokazalo se mikrovalno zračenje, zatim ultrazvučno i naposlijetku ultraljubičasto. Najbolji rezultati razgradnje BBP-a su postignuti djelovanjem mikrovalnog zračenja. Uz oksidans Na2S2O8 u kiselom području pH-vrijednosti (pH=4) i maksimalne koncentracije oksidansa, a uz oksidans H2O2 bila je dovoljna i minimalna koncentracija oksidansa za značajni rezultat. S ekonomskog gledišta i s gledišta zaštite okoliša prihvatljivije je primijeniti razgradnju BBP-a uz oksidans H2O2.

Abstract (english)

The aim of this work was to examine the optimal conditions for conducting experiments on the decomposition of a solution of benzyl butyl phthalate in water using several types of electromagnetic radiation: UV radiation, microwave radiation and ultrasonic radiation. The range of decomposition of the selected phthalate by the impact of individual electromagnetic radiation was determined by high performance liquid chromatography, HPLC. Benzyl butyl phthalate (BBP) is a synthetically produced phthalate ester. In the process of producing a plastic product containing BBP, it is applied as an external plasticizer and tends to migrate from that surface, becoming an environmental pollutant. This leads to the long-term presence of BBP in all parts of the environment (water, soil, air, sediment, silt, etc.), so it is especially important to recognize and know its effects on human health and the ecosystem. According to the increase in the efficiency of BBP decomposition, microwave radiation is proved to be the best solution, followed by ultrasonic radiation and finally UV radiation. The best results of BBP degradation were achieved by the microwave radiation. With Na2S2O8 oxidant in conditions of acidic pH values (pH=4) and maximum oxidant concentrations, while with H2O2 oxidant, the minimum oxidant concentration was sufficient for a significant result. From an economic point of view and from an environmental point of view, it is more acceptable to apply the decomposition of BBP with the H2O2 as an oxidant.

• Keywords: ftalati; benzil butil ftalat; UV zračenje; mikrovalno zračenje; ultrazvučno zračenje
• Keywords (english): phthalates; benzyl butyl phthalate; UV radiation; microwave radiation; ultrasonic radiation
• Language: croatian
• URN:NBN: urn:nbn:hr:149:835062
• Project: Number: IP-2019-04-9661; Title: Primjena naprednih tehnologija obrade voda za uklanjanje mikroplastike; Title: Advanced Water Treatment Technologies for Microplastics Removal; Acronym: AdWaTMiR; Leader: Tomislav Bolanča; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• 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: Access restricted to students and staff of home institution
• Created on: 2023-02-26 11:13:07