diplomsko delo visokošolskega strokovnega študijskega programa I. stopnje
Maja Poljšak (Author), Danijela Doberšek (Mentor), Marjana Simonič (Co-mentor), Darko Goričanec (Co-mentor)

Abstract

V diplomskem delu je predstavljena študija o težkih kovinah, njihovih lastnostih, vplivu na okolje. Predstavljeni so predvsem načini odstranjevanja težkih kovin iz kontaminiranih zemljin. Med vsemi načini odstranjevanja je podrobneje predstavljeno pranje tal s šibkimi kislinami, ki lahko poteka po ex situ in in situ metodi. Kisline vplivajo na težke kovine tako, da jim povečajo mobilnost ter učinkovitost spiranja kovin s tal. Izveden je bil poizkus odstranjevanja cinka in kadmija s klorovodikovo kislino, pri katerem smo rezultate primerjali z rezultati odstranjevanja s citronsko kislino iz strokovnih člankov. Ugotovili smo, da je pranje tal s šibko kislino bolj učinkovita, saj je učinek ekstrakcije večji in manjša je možnost sekundarnega onesnaženja. Naredila sem tudi analizo raziskav o onesnaženosti tal s težkimi kovinami v Sloveniji med leti 2004 in 2008, katera je pokazala da Slovenija v večini ni onesnažena s težkimi kovinami, prisotne so le na lokacijah, kjer se je nekoč izvajala rudniško-topilniška dejavnost.

Keywords

kontaminirana zemljina;težke kovine;remediacija zemlje;kisline;šibke kisline;diplomske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher: [M. Poljšak]
UDC: 666.123.4(043.2)
COBISS: 35974403 Link will open in a new window
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Downloads: 65
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Other data

Secondary language: English
Secondary title: Removal of heavy metals from contaminated soils with weak acids
Secondary abstract: The thesis presents a study on heavy metals, their properties, impact on the enviroment. In particular are presented methods for removing heavy metals from contaminated soils. Among all removing methods, washing the soil with weak acids, which can be done by the ex situ or in situ method, is presented in more details. Acids affect heavy metals by increasing their mobility and the efficiency of leaching metals from the ground. We performed an experiment, where we remove zinc and cadmium with hydrochloric acid, in which the results were compared to results of removal with citric acid from scientific researches. We found that washing the soil with citric acid is more efficient, because the extraction effect is greater and the possibility of secondary contamination is lower than removal with hydrochloric acid. I also did an analysis of research on soil contamination with heavy metals in Slovenia between 2004 in 2008, which showed that Slovenia is mostly not contaminated with heavy metals, they are only present at locations, where mining and artillery activity was once performed.
Secondary keywords: soil contaminations;heavy metals;soil remediation;acids;weak acids;
Type (COBISS): Bachelor thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages: VIII, 44 f.
ID: 12073267
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