Določanje elementne sestave kapnikov iz podzemnih rovov cone Tezno

Kavčič, Nika (author), Kolar, Mitja (mentor)

Kapniki so kristalne tvorbe, ki nastanejo s plastovitim nalaganjem sige na stene v jami. Apnenec oziroma kalcit se izloča iz kapljajoče vode, ko iz nje izhaja CO2. Apnenec je sestavljeni predvsem iz kalcijevega karbonata. Za kvantitativno analizo kapnikov iz podzemnih rovov cone Tezno v Mariboru sem uporabila točkovno analizo s SEM/EDS in optično emisijsko spektrometrijo z uporabo induktivno sklopljene plazme, s katero sem določala prisotnost in delež različnih kovin v vzorcih. Z vrstičnim elektronskim mikroskopom pa sem opravila površinsko analizo kapnikov, s katero sem določala strukturo kapnikov. Vzorca T1 in T2 sta bila odvzeta iz stropa rovov, vzorca Č1 in Č2 sta bil odvzeta iz stropa rovov ob črpališču vode, vzorec T3 pa je bil odvzet iz tal v rovu. V vseh vzorcih prevladuje kalcijev karbonat, poleg pa so prisotne še nekatere druge kovine.

• Language: Slovenian
• Keywords: kapniki, optična emisijska spektrometrija z uporabo induktivno sklopljene plazme (ICP-OES), vrstični elektronski mikroskop (SEM)
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2022
• PID: 20.500.12556/RUL-138837
• COBISS.SI-ID: 120691971
• Publication date in RUL: 22.08.2022

Secondary language

• Language: English
• Title: Determination of the elemental composition of stalactites from underground tunnels of the Tezno zone

Abstract

Stalactites are crystalline formations formed by layered siga on the walls of a cave. Limestone or calcite is excreted from dripping water when CO2 is removed. Limestone is composed mainly of calcium carbonate. For quantitative analysis of stalactites from underground tunnels of the Tezno zone in Maribor, I used SEM/EDS spot analysis and optical emission spectrometry using inductively coupled plasma to determine the presence and proportion of various metals that may be present in the samples. Using a scanning electron microscope, I performed a surface analysis of stalactites to determine the structure of stalactites. Samples T1 and T2 were taken from the tunnel ceiling, samples Č1 and Č2 were taken from the tunnel ceiling at the water pumping station, and sample T3 was taken from the tunnel floor. Calcium carbonate predominates in all samples and also there are some other metals in the samples.

• Keywords: stalactites, optical emission spectrometry using inductively coupled plasma (ICP-OES), scanning electron microscope (SEM)