prikaz prve stranice dokumenta Određivanje ravnotežne količine adsorbiranih kobaltovih iona na ljuskama jaja (T=28 oC)
  Download
PDF 2.1 MB
master's thesis
Određivanje ravnotežne količine adsorbiranih kobaltovih iona na ljuskama jaja (T=28 oC)
diplomski rad
2020. urn:nbn:hr:167:217105
Milinović, Magdalena
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

Cite this document

Milinović, M. (2020). Određivanje ravnotežne količine adsorbiranih kobaltovih iona na ljuskama jaja (T=28 oC) : diplomski rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:217105

Milinović, Magdalena. "Određivanje ravnotežne količine adsorbiranih kobaltovih iona na ljuskama jaja (T=28 oC) : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:167:217105

Milinović, Magdalena. "Određivanje ravnotežne količine adsorbiranih kobaltovih iona na ljuskama jaja (T=28 oC) : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:167:217105

Milinović, M. (2020). 'Određivanje ravnotežne količine adsorbiranih kobaltovih iona na ljuskama jaja (T=28 oC) : diplomski rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, accessed 11 December 2024, https://urn.nsk.hr/urn:nbn:hr:167:217105

Milinović M. Određivanje ravnotežne količine adsorbiranih kobaltovih iona na ljuskama jaja (T=28 oC) : diplomski rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2020 [cited 2024 December 11] Available at: https://urn.nsk.hr/urn:nbn:hr:167:217105

M. Milinović, "Određivanje ravnotežne količine adsorbiranih kobaltovih iona na ljuskama jaja (T=28 oC) : diplomski rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Split, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:167:217105

Please login to the repository to save this object to your list.
Metadata
TitleOdređivanje ravnotežne količine adsorbiranih kobaltovih iona na ljuskama jaja (T=28 oC) : diplomski rad
Title (english)Determination of equilibrium amount of cobalt ions adsorbed on egg shells (T=28 0C) : master thesis
AuthorMagdalena Milinović
MentorMario Nikola Mužek (mentor)
Committee memberSandra Svilović (predsjednik povjerenstva)
Committee memberMiće 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 country2020-07-30, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
U ovom je diplomskom radu ispitana adsorpcija kobaltovih iona na ljuskama jaja u ovisnosti o različitim početnim koncentracijama otopina kobaltovih iona (4,488 mmol dm-3, 8,365 mmol dm-3, 11,427 mmol dm-3, 20,814 mmol dm-3 te 31,223 mmol dm-3) pri stalnoj temperaturi od 28°C, brzini miješanja od 200 okr min-1, u trajanju od 96 h. Kao adsorbens korištene su ljuske jaja promjera d < 125 µm dok su koncentracije kobaltovih iona u ravnotežnim otopinama određene spektrofotometrijski. Na temelju dobivenih rezultata može se zaključiti kako količina adsorbiranih kobaltovih iona (qe) poraste s porastom ravnotežne koncentracije kobaltovih iona u otopini (ce) te postiže vrijednost koja predstavlja ravnotežnu količinu adsorbiranih kobaltovih iona na ljuskama jaja u iznosu qe = 0,163 mmol g-1. Učinkovitost adsorpcije kobaltovih iona dostiže svoju maksimalnu vrijednost pri početnoj koncentraciji od 8,365 mmol dm-3 te iznosi 9,758 %, a nakon toga opada s porastom početne koncentracije kobaltovih iona u otopini. Uzimajući u obzir izračunate vrijednosti za koeficijent korelacije R2 može se zaključiti kako se adsorpcija kobalta na ljuskama jaja najbolje može opisati Langmuirovim adsorpcijskim modelom.
Abstract (english)
In this diploma thesis the adsorption of cobalt ions on egg shells was studied depending on the different initial concentrations of cobalt ions solutions (4.488 mmol dm-3, 8.365 mmol dm-3, 11.427 mmol dm-3, 20.814 mmol dm-3, and 31.223 mmol dm-3) at a constant temperature of 28°C, stirring speed of 200 rpm for 96 h. Egg shells with diameter d < 125 m were used as adsorbent while the concentrations of cobalt ions in equilibrium solutions were determined spectrophotometrically. Based on the results obtained, it can be concluded that the amount of adsorbed cobalt ions (qe) increases with the increase of the equilibrium concentration of cobalt ions in solution (ce) reaching value of qe = 0.163 mmol g-1 that represents the equilibrium amount of adsorbed cobalt ions on egg shells. The adsorption efficiency of cobalt ions reaches its maximum value of 9.758 % at initial concentration of 8.365 mmol dm-3 and then decreases with the increase of initial concentration of cobalt ions in solution. Taking into account the calculated values of the correlation coefficient R2, it can be concluded that the adsorption of cobalt on egg shells can best be described by the Langmuir adsorption model.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:217105
ProjectNumber: IP-2016-06-1316
Title: BILJKE KAO IZVOR BIOAKTIVNIH SUMPOROVIH SPOJEVA TE NJIHOVA SPOSOBNOST HIPERAKUMULACIJE METALA
Acronym: BioSMe
Leader: Ivica Blažević
Jurisdiction: Croatia
Funder: HRZZ
Funding stream: IP
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 conditionsOpen access
Embargo expiration date: 2022-07-30
Terms of useLicence In copyright icon
Created on2020-09-01 11:18:24