Mineraloške i geokemijske karakteristike špiljskog sedimenta Đulinog ponora

master's thesis

• Title (english): Mineralogical and geochemical properties of cave sediment from Đulin ponor
• Author: Ana Ercegovac
• Mentor: Hana Fajković (mentor)
• Mentor: Dalibor Paar (komentor)
• Committee member: Hana Fajković (predsjednik povjerenstva)
• Committee member: Dalibor Paar (član povjerenstva)
• Committee member: Kristina Pikelj (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2023-02-20, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Geology and Paleontology

Abstract

Speleološki objekti značajni su u istraživanjima okoliša jer predstavljaju zamke za sedimente te je zato u Đulinom ponoru uzorkovano 9 uzoraka sedimenta i 14 uzoraka plastike kako bi se istražio antropogeni utjecaj. Uzorci su analizirani sljedećim metodama: fazna analiza, FTIR – ATR spektroskopija, kalcimetrija, voltametrija i izdvajanje mikroplastike iz sedimenata SPT-om. U svim uzorcima sedimenta determinirane su mineralne faze kalcit i kvarc, a u nekim uzorcima još su determinirani feldspati, dolomit i ankerit. U reprezentativnom uzorku su determinirani minerali glina klorit, illit i kaolinit. Kalcimetrijom je određivan udio karbonatna za 10 uzoraka i rezultati ukazuju da se u prosjeku radi o sedimentima s visokim udjelom karbonata, a raspon je 25 % - 75 %. U svim uzorcima sedimenta pronađena je mikroplastika, a najveći je broj čestica mikroplastike u uzorku ĐULA SPT 2 s 341 česticom mikroplastike na 1 gram sedimenta. Od 14 uzoraka plastike determiniranih FTIR – ATR spektroskopijom, najzastupljeniji polimer je polistiren. Prema rezultatima voltametrije potencijalno toksični metal koji ima najveći afinitet adsorpcije na plastiku je cink.

Abstract (english)

Speleological objects are important in environmental research because they represent traps for sediments, which is why 9 sediment samples and 14 plastic samples were collected in Đulin ponor in order to investigate anthropogenic influence. The samples were analyzed by the following methods: phase analysis, FTIR – ATR spectroscopy, calcimetry, voltammetry and separation of microplastics from sediments by SPT. The mineral phases calcite and quartz were determined in all sediment samples, and feldspar, dolomite and ankerite were also co-determined in some samples. The clay minerals chlorite, illite and kaolinite were determined in representative sample. Calcimetry was used to determine the percentage of carbonate for 10 samples, and the results indicate that, on average, these are sediments with a high percentage of carbonate, and the range is 25% - 75%. Microplastics were found in all sediment samples, and the largest number of microplastic particles was in the ĐULA SPT 2 sample with 341 microplastic particles per 1 gram of sediment. Of the 14 plastic samples determined by FTIR - ATR spectroscopy, the most represented polymer is polystyrene. According to the voltammetry results, the potentially toxic metal that has the highest adsorption affinity on plastic is zinc.

• Keywords: Đulin ponor; klastični špiljski sedimenti; mikroplastika; potencijalno toksični metali; fazna analiza; geokemijske metode (kalcimetrija; voltametrija; FTIR)
• Keywords (english): Đulin ponor; clastic cave sediments; microplastics; trace metals; phase analysis; geochemical methodes (calcimetry; voltametry; FTIR)
• Language: croatian
• URN:NBN: urn:nbn:hr:217:572448
• Study programme: Title: Graduate university study of Environmental Geology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra geologije (magistar/magistra geologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2025-02-20
• Created on: 2023-06-21 08:56:39