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Title:Adsorpcija ionov težkih kovin na zeolit : diplomsko delo visokošolskega strokovnega študijskega programa I. stopnje
Authors:Šket, Urban (Author)
Škerget, Mojca (Mentor) More about this mentor... New window
Čolnik, Maja (Mentor) More about this mentor... New window
Files:.pdf VS_Sket_Urban_2019.pdf (2,44 MB)
MD5: 7865C8947865ED8DA4A2A670B7CA7947
 
Language:Slovenian
Work type:Bachelor thesis/paper (mb11)
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Diplomsko delo je rezultat preučevanja adsorpcije težkih ionov Pb2+, Cu2+ in Fe2+ na zeolit. Ker so ti ioni zelo močni onesnaževalci okolja, se pojavlja vprašanje kako zaščititi naravo pred njihovimi škodljivimi vplivi. Ena iz med možnosti je adsorpcija ionov na močen adsorbent, kar je v našem primeru zeolit. Tako je bistveno, da dobro spoznamo zeolit, preučimo njegovo strukturo in lastnosti, ter nato z različnimi kemijskimi analizami določimo, kakšne zmožnosti adsorpcije ima zeolit. Namen diplomske naloge je bil določiti adsorpcijske lastnosti zeolita v raztopini za adsorpcijo ionov težkih kovin ( Cu2+, Fe2+, Pb2+ ), določiti masne koncentracije kovinskih ionov z optično emisijsko spektroskopijo (ICP OES), ter preučiti specifiko samega zeolita (zeta potencial, specifična površina, velikost delcev). Za ugotavljanje adsopcijskih lastnosti zeolita smo spreminjali dva ključna parametra, koncentracijo raztopine težkih ionov, ter pH raztopine. S spreminjanjem teh parametrov smo prišli do ugotovitve, da so najbolj optimalni pogoji za adsorpcijo pri koncentraciji 13 mM in pri pH vrednosti 7. S preiskovanjem vpliva koncentracije težkih ionov na adsorbent smo ugotovili, da uspešnost adsorpcije pri višji koncentraciji upada, izjema je le baker. Pri spreminjanju pH vrednosti, pa se je izkazalo, da pH nima takšen velik vpliv na adsorpcijo kot jo ima koncentracija, saj smo ugotovili, da se adsorpcijska sposobnost malo zmanjša le pri zelo nizki pH vrednosti ( pH = 2,5 ). Ugotavljali smo tudi medsebojni vpliv ionov na učinkovitost adsorpcije ionov na zeolit, pri čemer se je izkazalo, da mešanica ionov v raztopini dobro vpliva na adsorpcijo, saj je bila v našem primeru učinkovitost adsorpcije za vse tri ione nad 99%.
Keywords:adsorpcija, zeolit, ioni težkih kovin, zeta potencial, koncentracija, pH raztopine
Year of publishing:2019
Place of performance:Maribor
Publisher:[U. Šket]
Number of pages:IX, 23 str.
Source:Maribor
UDC:66.081:661.183.6(043.2)
COBISS_ID:22691606 New window
NUK URN:URN:SI:UM:DK:NMGO30OE
Views:367
Downloads:54
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:04.09.2019

Secondary language

Language:English
Title:Adsorption of heavy metal ions on zeolite
Abstract:The diploma thesis is the result of studying the adsorption of heavy metal ions of Pb2+, Cu2+ and Fe2+ on zeolite. Since this ions are very powerful pollutants of the environment, the question arises as how to protect nature from their harmful effects. One of the possibilities is the adsorption of ions on a strong adsorbent, which in our case is zeolite. It is essential to get to know the zeolite well, to study its structure and properties, and then to determine, through various chemical analyzes, what is the zeolite's adsorption capacity. The purpose of this thesis was to determine the adsorption properties of zeolit for adsorption of heavy metal ions (Cu2+, Fe2+, Pb2+) in solution, to determine the mass concentrations of metal ions by optical emission spectroscopy (ICP OES), and to study the specificity of the zeolite itself (zeta potential, specific surface area, particle size). In order to determine the adsorption properties of zeolite, two key parameters, the concentration of the heavy metal ions in solution and the pH of the solution, have been studied. By changing these parameters, the most optimal conditions for adsorption were determined at a concentration of 13 mM and at a pH value of 7. By examining the influence of the concentration of heavy metal ions on the adsorbent, we found that the adsorption efficiency at a higher concentration decreases, with the exception of copper. When changing the pH value, it turned out that pH did not have as much effect on adsorption as the concentration, since we found that the adsorption efficiency decreased only at very low pH (pH = 2.5). We also investigated the interaction of ions on the adsorption efficiency of the zeolite, which showed that the mixture of ions in solution had a good effect on adsorption, since in our case the adsorption efficiency for all three ions was above 99%.
Keywords:Adsorption, zeolite, heavy metal ions, zeta potential, concentration, pH of the aqueous solution


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