prikaz prve stranice dokumenta Ravnoteža adsorpcije kobaltovih iona na humusu Potgrond H (T=308 K)
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undergraduate thesis
Ravnoteža adsorpcije kobaltovih iona na humusu Potgrond H (T=308 K)
završni rad
2019. urn:nbn:hr:167:712225
Sesar, Mario
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

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Sesar, M. (2019). Ravnoteža adsorpcije kobaltovih iona na humusu Potgrond H (T=308 K) : završni rad (Undergraduate thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:712225

Sesar, Mario. "Ravnoteža adsorpcije kobaltovih iona na humusu Potgrond H (T=308 K) : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, 2019. https://urn.nsk.hr/urn:nbn:hr:167:712225

Sesar, Mario. "Ravnoteža adsorpcije kobaltovih iona na humusu Potgrond H (T=308 K) : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, 2019. https://urn.nsk.hr/urn:nbn:hr:167:712225

Sesar, M. (2019). 'Ravnoteža adsorpcije kobaltovih iona na humusu Potgrond H (T=308 K) : završni rad', Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, accessed 19 April 2024, https://urn.nsk.hr/urn:nbn:hr:167:712225

Sesar M. Ravnoteža adsorpcije kobaltovih iona na humusu Potgrond H (T=308 K) : završni rad [Undergraduate thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2019 [cited 2024 April 19] Available at: https://urn.nsk.hr/urn:nbn:hr:167:712225

M. Sesar, "Ravnoteža adsorpcije kobaltovih iona na humusu Potgrond H (T=308 K) : završni rad", Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, Split, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:167:712225

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Metadata
TitleRavnoteža adsorpcije kobaltovih iona na humusu Potgrond H (T=308 K) : završni rad
Title (english)The equilibrium of cobalt ions adsorption on humus Potgrond H (T=308 K) : bachelor thesis
AuthorMario Sesar
MentorMario Nikola Mužek (mentor)
MBZ: 308280
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 country2019-09-30, 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 (4,284 mmol dm -3 , 8,161 mmol dm -3 , 11,223 mmol dm -3 , 20,406 mmol dm -3 te 30,610 mmol dm -3 ) na prosijanom humusu u šaržnom reaktoru pri odabranim ravnotežnim uvjetima: temperatura od 308 K, brzina okretaja od 200 okr min -1 , trajanje od 48 h te veličini čestica < 500 μm. Na temelju dobivenih rezultata može se zaključiti kako se maksimalna količina adsorbiranih kobaltovih iona na humusu (q e ) postiže pri početnoj koncentraciji kobaltovog(II) nitrata heksahidrata od 30,610 mmol dm -3 te iznosi q e = 0,367 mmol g -1 , dok je najviša učinkovitost adsorpcije postignuta kod početne koncentracije otopine od 4,284 mmol dm -3 te iznosi 19,056 %. Daljnjim porastom početne koncentracije kobaltovih iona u otopini učinkovitost adsorpcije kobaltovih iona na humusu opada. Uzimajući u obzir izračunate vrijednosti za koeficijent korelacije R 2 , kao i slaganje modela odabranih izotermi s eksperimentalno dobivenim podatcima može se zaključiti kako se adsorpcija kobaltovih iona na humusu može opisati Langmuirovim adsorpcijskim modelom (R 2 = 0,961).
Abstract (english)
The adsorption of cobalt ions from cobalt(II) nitrate hexahydrate solutions of different initial concentrations (4.284 mmol dm -3 , 8.161 mmol dm -3 , 11.223 mmol dm -3 , 20.406 mmol dm -3 , and 30.610 mmol dm -3 ) was studied on sieved humus in a batch reactor under selected equilibrium conditions: temperature of 308 K, a stirring speed of 200 rpm, duration of 48 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 (q e ) is reached at an initial concentration of cobalt(II) nitrate hexahydrate of 30.610 mmol dm -3 with the value of q e = 0.367 mmol g -1 , while the highest adsorption efficiency was achieved at an initial solution concentration of 4.284 mmol dm -3 and was 19.056 %. Further increase in the initial concentration of cobalt ions in solution, decreases adsorption efficiency of cobalt ions on humus. Considering the calculated values for the correlation coefficient R 2 , as well as the fitting of the models of selected isotherms with the experimentally obtained data, it can be concluded that the adsorption of cobalt ions on humus can be described by the Langmuir adsorption model (R 2 = 0.961).
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:712225
ProjectNumber: 1316
Title: Biljke kao izvor bioaktivnih sumporovih spojeva te njihoav sposobnost hiperakumulacije metala
Acronym: BioSMe
Leader: Ivica Blažević
Jurisdiction: Croatia
Funder: HRZZ
Study programmeTitle: Chemical Technology; specializations in: Chemical Engineering, Environmental Protection
Course: Chemical Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Embargo expiration date: 2021-10-01
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Public noteKljučne riječi doradio knjižničar/ Key words are revised by the librarian
Created on2020-01-27 09:50:07