Toksični učinak poli(vinil-klorida) na mikroalgu Scenedesmus sp.

undergraduate thesis

• Title (english): Toxicity effect of polyvinyl chloride on microalga Scenedesmus sp.
• Author: Leo Bolješić
• Mentor: Dajana Kučić Grgić (mentor)
• Committee member: Dajana Kučić Grgić (predsjednik povjerenstva)
• Committee member: Lidija Furač (član povjerenstva)
• Committee member: Matija Cvetnić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2021-09-06, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Dvadeset i prvo stoljeće je, uz nova tehnološka dostignuća i ubrzani razvoj industrije, donijelo i nove probleme s kojima se zaštita okoliša i industrijska ekologija kao takve moraju nositi. Plastične mase (polimeri) danas su prisutne na svakom koraku, a samo onečišćenje koje nastaje nepravilnim gospodarenjem plastikom i plastičnim otpadom manifestira se od makroskopskih razina (odlaganje u prirodu, narušavanje okolišnog izgleda...) do onih mikroskopskih (akumulacija mikroplastike (MP) u čitavim hranidbenim lancima okolišnih organizama). Kada se spominje MP-e, misli se na čestice <5 mm koje su raznim fizikalnim procesima nastale kao posljedica nepravilnog gospodarenja plastičnim otpadom. Kao takva, MP-a je kroz niz eksperimentalnih rezultata pokazala toksični učinak na okolišne organizme, ali je i dalje sam učinak MP-a u fokusu raznih istraživanja na globalnoj razini. U ovome radu provedena su toksikološka ispitivanja utjecaja MP-PVC-a veličina <300 μm, 300-500 μm i 500-700 μm, i koncentracija 50 mg/L, 250 mg/L, 500 mg/L, 750 mg/L i 1000 mg/L na inhibiciju rasta mikroalge Scenedesmus sp. na temelju promjene logaritamskog broja živih stanica (log CFU). Osim logaritamskog broja živih stanica, pratila se potencijalna promjena morfološkog oblika. Rezultati ispitivanja pokazali su da je inhibicija rasta mikroalge uvelike uvjetovana pokazateljima kao što su veličina i koncentracija čestica MP-PVC-a. Naime, najveću inhibiciju (10,50 %) pokazale su veličine čestica <300 μm i 300-500 μm i koncentracije 750 mg/L i 1000 mg/L. Promjena morfološkog oblika nije uočena.

Abstract (english)

Along with the new technological accomplishments and accelerated development of industry, 21st century also raised certain environmental issues that have to be further tackled by environmental protection and industrial ecology. Plastic masses (polymers) are today present at every turn. However, the pollution caused by improper management of plastics and plastic waste is manifested from macroscopic levels (disposal in nature, environmental disturbance ...) to those microscopic (accumulation of microplastics (MP) in entire food chains of environmental organisms). MPs are considered plastic particles smaller than 5 mm that were formed by various physical processes as a result of improper management of plastic waste. As such, MP has shown a toxic effect on environmental organisms through a series of experimental results. However, the effect of MPs remains the focus of various global studies. In this work, toxicological studies of the effects of MP-PVC, which includes sizes <300 μm; 300-500 μm; 500-700 μm and concentrations 50 mg/L; 250 mg/L; 500 mg/L: 750 mg/L; 1000 mg/L, were performed in order to inhibit the growth of microalgae Scenedesmus sp. based on the change in the logarithmic number of living cells (log CFU). In addition to the logarithmic number of living cells, a potential change in morphological shape was monitored. The test results showed that the inhibition of microalgae growth is largely conditioned by indicators such as the size and concentration of MP-PVC particles. The highest inhibition percentage (10.50%) was shown by particle sizes <300 μm, 300-500 μm and concentrations of 750 mg/L and 1000 mg/L. No change in morphological shape was observed.

• Keywords: mikroplastika; poli(vinil-klorid); Scenedesmus sp.; mikroalga; toksičnost
• Keywords (english): microplastics; poly(vinyl-chloride); Scenedesmus sp.; microalgae; toxicity
• Language: croatian
• URN:NBN: urn:nbn:hr:149:451570
• 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 - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka ekoinženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka ekoinženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-03-23 13:52:08