Opterećenje rijeke Save plastikom

master's thesis

• Title (english): Plastic loading of the Sava river
• Author: Valentina Čačić
• Mentor: Hana Fajković (mentor)
• Mentor: Ivana Buj (mentor)
• Committee member: Hana Fajković (predsjednik povjerenstva)
• Committee member: Ivana Buj (član povjerenstva)
• Committee member: Neven Bočić (član povjerenstva)
• Committee member: Kristina Pikelj (član povjerenstva)
• Committee member: Zoran Marčić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2022-01-31, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Mikroplastika predstavlja jedan od glavnih izvora zagađenja okoliša u svim
ekosustavima pa tako i vodenim na globalnoj razini. U ovom radu proučavana je
mikroplastika iz stupca vode, sedimenta i riba rijeke Save na tri točke. Ukupno je
uzorkovano 6 uzoraka iz stupca vode, 12 uzoraka sedimenta i 6 riba. U svim uzorcima je
prvo uklonjena organska tvar, a u uzorcima sedimenta i stupca vode je uklonjena i
karbonatna komponenta. Nakon toga, metodom separacije na temelju gustoće, koja je za
potrebe ovog rada rađena otopinom natrijevog polivolframata (SPT-om) gustoće 1,65 g/cm3
izdvojena je mikroplastika te su uzorci podvrgnuti vizualnom pregledu pod lupom.
Identifikacija mikroplastike je rađena na FTIR-u (Fourier-transform infrared spectroscopy)
te su identificirane 2 vrste mikroplastike: polipropilen (PP) i najlon. Dominantna boja
izdvojenih čestica je crna, ali su pronađene i čestice drugih boja poput plave i crvene boje, a
većina čestica je vlaknastog oblika. U uzorcima sedimenta broj čestica mikroplastike se
povećava nizvodno od točke 1 prema točki 3 te je na točki 3 najveći. U uzorcima dobivenim
iz suspenzije vode broj čestica se smanjuje nizvodno od točke 1 prema točki 3 dok je u
uzorcima riba najmanja količina mikroplastičnih čestica zabilježena u točki 2, a najveća u
točki 3

Abstract (english)

Microplastic represents one of the main sources of environmental pollution in all
ecosystems, including aquatic ones at global level. This research studied microplastic from
water column, sediment and fish of Sava River from three locations. Six (6) water columns,
twelve (12) sediment and six (6) fish samples were examined in total. First, organic matter
was removed from all samples, then the carbonate component was removed from sediment
and water column samples. Subsequently, using density separation method, which was
performed for the purposes of this research using the solution of sodium polyhydrate (SPT)
with a density of 1.65 g/cm3, microplastic was separated, and all the samples were subjected
to visual inspection under a magnifying glass. Identification was performed on FTIR
(Fourier-transform infrared spectroscopy) and two types of microplastic were identified:
polypropylene (PP) and naylon. The dominant color of the isolated particles was black, but
particles of other colors such as blue and red were also present, most of the particles fibrous
in shape. In sediment samples, the number of microplastic particles increases downstream
from point 1 to point 3 and is highest at point 3. In samples obtained from the suspension of
water, the number of particles decreases downstream from point 1 to point 3, while in fish
samples the smallest amount of microplastic particles was found at point 2 and the largest at
point 3.

• Keywords: mikroplastika; rijeka Sava; SPT; FTIR; klen
• Keywords (english): microplastic; River Sava; SPT; FTIR; chub
• Language: croatian
• URN:NBN: urn:nbn:hr:217:290118
• Study programme: Title: Enviromental Sciences; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra struke znanosti o okolišu (magistar/magistra struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-02-07 14:12:39