prikaz prve stranice dokumenta Ravnoteža adsorpcije kobaltovih iona na humusu (T=318K)
Embargo period 2025-11-03
master's thesis
Ravnoteža adsorpcije kobaltovih iona na humusu (T=318K)
diplomski rad
2022. urn:nbn:hr:167:380762
Sesar, Mario
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

Cite this document

Sesar, M. (2022). Ravnoteža adsorpcije kobaltovih iona na humusu (T=318K) : diplomski rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:380762

Sesar, Mario. "Ravnoteža adsorpcije kobaltovih iona na humusu (T=318K) : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:167:380762

Sesar, Mario. "Ravnoteža adsorpcije kobaltovih iona na humusu (T=318K) : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:167:380762

Sesar, M. (2022). 'Ravnoteža adsorpcije kobaltovih iona na humusu (T=318K) : diplomski rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, accessed 26 December 2024, https://urn.nsk.hr/urn:nbn:hr:167:380762

Sesar M. Ravnoteža adsorpcije kobaltovih iona na humusu (T=318K) : diplomski rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2022 [cited 2024 December 26] Available at: https://urn.nsk.hr/urn:nbn:hr:167:380762

M. Sesar, "Ravnoteža adsorpcije kobaltovih iona na humusu (T=318K) : diplomski rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Split, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:167:380762

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Metadata
TitleRavnoteža adsorpcije kobaltovih iona na humusu (T=318K) : diplomski rad
Title (english)Equilibrium adsorption of cobalt ions on humus (T=318K) : diploma thesis
AuthorMario Sesar
MentorMario Nikola Mužek (mentor)
Committee memberFranko Burčul (predsjednik povjerenstva)
Committee memberJelena Jakić (član povjerenstva)
Committee memberMario Nikola Mužek (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
(Division of Engineering and Chemistry)
Split
Defense date and country2022-11-30, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
: Ispitana je adsorpcija kobaltovih iona iz otopina kobaltovog(II) nitrata heksahidrata, različitih početnih koncentracija (4,692 mmol dm-3, 8,365 mmol dm-3, 11,427 mmol dm-3, 24,896 mmol dm-3 te 36,325 mmol dm-3) na prosijanom humusu u šaržnom reaktoru pri odabranim eksperimentalnim uvjetima: temperatura od 318 K, brzina okretaja od 200 okr min-1, trajanje od 96 h te veličini čestica < 500 μm. Na temelju dobivenih rezultata može se zaključiti kako se maksimalna količina adsorbiranih kobaltovih iona na humusu (qe) postiže pri početnoj koncentraciji kobaltovog(II) nitrata heksahidrata od 36,325 mmol dm-3 te iznosi qe = 0,490 mmol g-1, dok je najviša učinkovitost adsorpcije postignuta kod najniže odabrane početne koncentracije otopine od 4,692 mmol dm-3 te iznosi 8,699%. Daljnjim porastom početne koncentracije kobaltovih iona u otopini učinkovitost adsorpcije kobaltovih iona na humusu opada. Uzimajući u obzir kvalitetu slaganja adsorpcijskih modela s podatcima dobivenim eksperimentalno, kao i usporedbom izračunatih vrijednosti maksimuma kapaciteta adsorpcije kobaltovih iona s onima eksperimentalno dobivenim te statističkih parametara (RMSE i χ2), može se zaključiti da najbolje slaganje s eksperimentalnim podatcima pokazuju Freundlichova i Redlich-Petersonova izoterma.
Abstract (english)
The adsorption of cobalt ions from cobalt (II) nitrate hexahydrate solutions of different initial concentrations (4.692 mmol dm-3, 8.365 mmol dm-3, 11.427 mmol dm-3, 24.896 mmol dm-3, and 36.325 mmol dm-3) was studied on sieved humus in a batch reactor under selected experimental conditions: temperature of 318 K, a stirring speed of 200 rpm, duration of 96 h, and particle size < 500 μm. Based on the results obtained, it can be concluded that the maximum amount of cobalt ions adsorbed on humus (qe) is reached at an initial concentration of cobalt (II) nitrate hexahydrate of 36.325 mmol dm-3 with the value of qe = 0.490 mmol g-1, while the highest adsorption efficiency was achieved at an initial solution concentration of 4.692 mmol dm-3 and was 8.699%. Further increase in the initial concentration of cobalt ions in solution, decreases adsorption efficiency of cobalt ions on humus. By estimating the fitting of adsorption models with experimental data, by comparing calculated maximum adsorption capacity values with experimentally obtained, and comparing statistical parameter values of RMSE and χ2, it can be concluded that the best agreement with the experimental data is shown by the Freundlich and Redlich-Peterson isotherm.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:380762
Study programmeTitle: Chemical Technology; specializations in: Materials, Environmental Protection, Mediteranean Cultures, Materials and Environmental protection
Course: Materials
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsEmbargoed access
Embargo expiration date: 2025-11-03
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Created on2023-11-03 09:45:38