diplomsko delo
Sara Sovdat (Author), Gabriela Kalčíková (Mentor)

Abstract

Mikroplastiko predstavljajo plastični delci v velikostih od 1 µm do 1 mm, sestavljajo jo lahko različne vrste polimerov, pojavlja pa se v različnih oblikah in velikostih. Najdemo jo v vodnih ekosistemih, kjer nanjo vplivajo biotski in abiotski dejavniki, zaradi katerih se spremenijo njene lastnosti. Glavni vir mikroplastike v vodnem okolju so čistilne naprave, kamor zahajajo delci mikroplastike predvsem iz kozmetičnih izdelkov in vlakna iz sintetičnih oblačil. Večina današnjih raziskav je potrdila vpliv mikroplastike na vodne organizme, predvsem vodne živali, kot so ribe in vodne bolhe, vpliv na vodne rastline pa ni še dobro raziskan. V tem kontekstu je bil cilj diplomske naloge oceniti, v kolikšni meri prisotnost mikroplastike vpliva na vodno rastlino malo vodno lečo Lemna minor posebej na specifično hitrost rasti rastline, dolžino njenih korenin in vsebnost fotosintetskih pigmentov. Uporabili smo dve obliki polietilenskih mikrokroglic estrahiranih iz kozmetičnih izdelkov; tako imenovano surovo mikroplastiko in starano mikroplastiko, ki je bila predhodno podvržena procesu staranja v površinski vodi. Pri raziskavi smo ugotovili, da prisotnost mikroplastike ne vpliva na specifično hitrost rasti male vodne leče. Po drugi strani pa smo zasledili vpliv mikroplastike na dolžino korenin in vsebnost fotosintetskih pigmentov rastline. Na podlagi rezultatov in ugotovitev lahko potrdimo, da tako surova kor starana mikroplastika do določene mere negativno vplivata na rast in razvoj male vodne leče. S tem smo dokazali, da prisotnost mikroplastike v ekosistemu predstavlja resen problem, ki se mu bomo morali v prihodnosti, v dobrobit nas in ostalih organizmov v celotnem ekosistemu, še bolj posvetiti.

Keywords

mikroplastika;staranje mikroplastike;vodno okolje;biofilm;mala vodna leča;Lemna minor;test strupenosti;diplomska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [S. Sovdat]
UDC: 504.5(043.2)
COBISS: 163752707 Link will open in a new window
Views: 6
Downloads: 0
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Other data

Secondary language: English
Secondary title: The effect of pristine and aged microplastics on aquatic organisms
Secondary abstract: Microplastics are plastic particles ranging in size from 1 µm to 1 mm. They can be composed of different types of polymers and come in a variety of shapes and sizes. Microplastics are found in aquatic ecosystems, where they are affected by biotic and abiotic factors that change their properties. The main source of microplastics in the aquatic environment are wastewater treatment plants, which receive microplastic particles mainly from cosmetics and fibres from synthetic clothing. Most of recent studies have confirmed the impact of microplastics on aquatic organisms, especially aquatic animals such as fish and water fleas, but the impact on aquatic plants has not been well understood yet. In this context, the aim of this diploma thesis was to determine the effects of microplastics on the aquatic plant duckweed Lemna minor, in particular the specific growth rate of the plant, the length of its roots and the content of photosynthetic pigments. We used two types of polyethylene microspheres extracted from cosmetic products; pristine microplastics and aged microplastics which was subjected to an ageing process in surface water. Microplastics did not have negative effects on the specific growth rate of duckweed. On the other hand, microplastics effected root length and concentration of photosynthetic pigments. Therefore, based on results, we confirmed that microplastics can negatively affect duckweed. This demonstrated that the presence of microplastics in ecosystems is a serious problem that we will need to address more in the future, for our own benefit and for the benefit of other organisms in the entire environment.
Secondary keywords: aquatic environment;aging;biofilm;duckweed;microplastics;Onesnaževanje vode;Univerzitetna in visokošolska dela;
Type (COBISS): Bachelor thesis/paper
Study programme: 1000372
Thesis comment: Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, UNI Kemijsko inženirstvo
Pages: 32 str.
ID: 19908966