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Characterization of microplastics from Bačvice beach and teh estuary of the river Neretva : diploma thesis
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This Croatian diploma thesis characterized microplastic waste found in sediment from Bacvice beach and the Neretva estuary using Raman spectroscopy. Researchers identified the polymer composition of collected particles and discussed local contamination sources.
U ovom radu provedena je karakterizacija i identifikacija mikroplastičnog otpada nađenog u sedimentu gradske plaže Bačvice u Splitu i na ušću Neretve. Uzorkovanje i separaciju uzoraka proveo je Institut za oceanografiju i ribarstvo u Splitu. Uzorci su dostavljeni na adresu Kemijsko - tehnološkog fakulteta u Splitu gdje je provedena daljnja analiza. Karakterizacija mikroplastike izvršena je nad 228 ispitaka s lokacije Bačvice u Splitu i 32 ispitka s Neretve. Ispitci su vizualnom analizom svrstani u kategorije prema obliku, definirane DeFishGear protokolom: filamenti, filmovi, fragmenti, granule, peleti i pjene, nakon čega im je određena boja i prozirnost. Masa pojedinačnih ispitaka određena je pomoću analitičke vage, a površina i maksimalna dimenzija određene su upotrebom Digimizer programa za obradu slika. Identifikacija vrste mikroplastike provedena je FTIR spektroskopijom i diferencijalnom pretražnom kalorimetrijom. Identificirano je ukupno 40 ispitaka s lokacije Bačvice i 32 s lokacije Neretva. Ostali su bili premalih dimenzija i mase za analizu ovim tehnikama. Najzastupljenija kategorija su fragmenti. Ispitci su većinom neprozirni, bijele boje, a većina ih prema veličini pripada mikroplastici (čestice promjera < 5 mm). Najzastupljenija vrsta polimernog materijala u ukupnom uzorku je polipropilen, nakon kojeg slijede polietilen (visoke i niske gustoće) i polistiren. Dobiveni rezultati ukazuju na postojanje mikroplastičnog otpada u sedimentu hrvatskih plaža, koji većim dijelom vjerojatno potječe od nepropisno odbačene jednokratne ambalaže.
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Karakterizacija mikroplastike iz sedimenta plaže Bačvice i ušća Neretve
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This thesis characterized and identified microplastic waste in sediment samples from Bacvice beach in Split, Croatia and from the Neretva River estuary. Raman spectroscopy was used to identify polymer types among the 228 plastic particles analyzed.
Detection and characterisation of microplastics in lake sediments: A study in the Zagreb region
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Researchers analyzed the presence, types, and quantities of microplastics in sediments from four lakes in the Zagreb region of Croatia using density separation and micro-Raman spectroscopy, finding that polystyrene, polyethylene, and polyethylene terephthalate were the predominant polymer types.
Detection and characterisation of microplastics in lake sediments: A study in the Zagreb region
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Researchers analyzed microplastics in sediment samples from four lakes in the Zagreb region of Croatia using density separation with zinc chloride and micro-Raman spectroscopy with a mapping function to quantify and characterize particles. They found microplastics in all lake sediments at concentrations between 113,000 and 764,000 particles per kg of sediment, with polystyrene, polyethylene, polyethylene terephthalate, polypropylene, and nylon as predominant polymers and the majority of particles in the 5 to 10 micrometer size range.
The Raman Spectroscopy Approach to Different Freshwater Microplastics and Quantitative Characterization of Polyethylene Aged in the Environment
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Researchers used Raman spectroscopy to identify and characterize microplastics from multiple freshwater sites feeding the Baltic Sea, finding polypropylene, polyethylene, polycarbonate, and polystyrene as the most common polymer types. The study also demonstrated that Raman spectra can provide quantitative information on the crystallinity and density of aged polyethylene, enabling assessment of environmental weathering.
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