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master's thesis
Uklanjanje fosfata iz otpadne vode biosorpcijom na biougljen od heljdinih ljuskica funkcionaliziran s H2SO4 i FeCl3
Osijek: Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY, 2024. urn:nbn:hr:109:703305
Zovko, Maja
Josip Juraj Strossmayer University of Osijek
FACULTY OF FOOD TECHNOLOGY
Department of Process Engineering
Sub-department of Bioprocess Engineering

Institutional repository: Repository of the Faculty of Food Technology Osijek

Cite this document

Zovko, M. (2024). Uklanjanje fosfata iz otpadne vode biosorpcijom na biougljen od heljdinih ljuskica funkcionaliziran s H2SO4 i FeCl3 (Master's thesis). Osijek: Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY. Retrieved from https://urn.nsk.hr/urn:nbn:hr:109:703305

Zovko, Maja. "Uklanjanje fosfata iz otpadne vode biosorpcijom na biougljen od heljdinih ljuskica funkcionaliziran s H2SO4 i FeCl3." Master's thesis, Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY, 2024. https://urn.nsk.hr/urn:nbn:hr:109:703305

Zovko, Maja. "Uklanjanje fosfata iz otpadne vode biosorpcijom na biougljen od heljdinih ljuskica funkcionaliziran s H2SO4 i FeCl3." Master's thesis, Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY, 2024. https://urn.nsk.hr/urn:nbn:hr:109:703305

Zovko, M. (2024). 'Uklanjanje fosfata iz otpadne vode biosorpcijom na biougljen od heljdinih ljuskica funkcionaliziran s H2SO4 i FeCl3', Master's thesis, Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY, accessed 26 November 2024, https://urn.nsk.hr/urn:nbn:hr:109:703305

Zovko M. Uklanjanje fosfata iz otpadne vode biosorpcijom na biougljen od heljdinih ljuskica funkcionaliziran s H2SO4 i FeCl3 [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY; 2024 [cited 2024 November 26] Available at: https://urn.nsk.hr/urn:nbn:hr:109:703305

M. Zovko, "Uklanjanje fosfata iz otpadne vode biosorpcijom na biougljen od heljdinih ljuskica funkcionaliziran s H2SO4 i FeCl3", Master's thesis, Josip Juraj Strossmayer University of Osijek, FACULTY OF FOOD TECHNOLOGY, Osijek, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:109:703305

Metadata
TitleUklanjanje fosfata iz otpadne vode biosorpcijom na biougljen od heljdinih ljuskica funkcionaliziran s H2SO4 i FeCl3
Title (english)Phosphate Removal from Wastewater by Biosorption on Buckwheat Hull Biochar Functionalized with H2SO4 and FeCl3
AuthorMaja Zovko
MentorNatalija Velić (mentor)
Committee memberMarija Stjepanović (predsjednik povjerenstva)
Committee memberNatalija Velić (član povjerenstva)
Committee memberIvana Tomac (član povjerenstva)
Committee memberPetra Matić (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
FACULTY OF FOOD TECHNOLOGY
(Department of Process Engineering)
(Sub-department of Bioprocess Engineering)
Osijek
Defense date and country2024-09-25, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Biotechnology
Abstract
Cilj rada bio je istražiti mogućnost uklanjanje fosfata iz modelnih otopina i sintetske otpadne vode korištenjem biougljena od heljdinih ljuskica funkcionaliziranog s H2SO4 i FeCl3. U tu svrhu provedena je karakterizacija biosorbensa koja je uključivala određivanje točke nultog naboja (pHpzc), FT-IR analizu funkcijskih skupina i analizu specifične površine (BET). Nadalje, provedeni su šaržni eksperimenti u kojima je ispitana učinkovitost biosorpcije u ovisnosti o koncentraciji biosorbensa (1 - 10 g dm⁻³), vremena kontakta (15 - 360 minuta), početne koncentracije fosfata (1 - 300 mg dm⁻³) i pH (2 - 10). Povećanjem koncentracije biosorbensa povećao se postotak uklanjanja fosfata, dok se povećanjem početne koncentracije fosfata smanjivao postotak uklanjanja. Najveći postotak uklanjanja fosfata postignut je pri pH = 2. Uklanjanje je bilo učinkovitije u modelnim otopinama fosfata u odnosu na sintetsku otpadnu vodu. Eksperimentalni podatci dobiveni provođenjem šaržnih biosorpcijskih eksperimenata analizirani su primjenom ravnotežnih adsorpcijskih modela (Freundlich i Langmuir) te kinetičkih modela pseudo-prvog reda, pseudo-drugog reda i Elovicheva modela. Freundlichov ravnotežni model bolje opisuje proces biosorpcije fosfata na funkcionalizirani biougljen od heljdinih ljuskica u usporedbi s Langmuirovim modelom, dok Elovichev model najbolje opisuje kinetiku biosorpcije. Desorpcija fosfata s površine zasićenog biosorbensa provedena je primjenom različitih otapala, pri čemu je učinkovitost bila izrazito mala (0,13 do 6,06 %).
Abstract (english)
The aim of this study was to investigate the potential for phosphate removal from model solutions and synthetic wastewater using biochar derived from buckwheat hulls, functionalized with H₂SO₄ and FeCl₃. To this end, biochar characterization was performed, including determination of the point of zero charge (pHpzc), FT-IR analysis of functional groups, and specific surface area analysis (BET). Furthermore, batch experiments were conducted to assess biosorption efficiency depending on biosorbent concentration (1 - 10 g dm⁻³), contact time (15 - 360 minutes), initial phosphate concentration (1 - 300 mg dm⁻³), and pH (2 - 10). Increasing the biosorbent concentration enhanced the phosphate removal percentage, whereas increasing the initial phosphate concentration resulted in a decrease in removal efficiency. The highest phosphate removal efficiency was achieved at pH = 2. Phosphate removal was more effective in model phosphate solutions compared to synthetic wastewater. Experimental data from the batch biosorption experiments were analyzed using equilibrium adsorption models (Freundlich and Langmuir) and kinetic models, including the pseudo-first-order, pseudo-second-order, and Elovich models. The Freundlich equilibrium model provided a better fit for the phosphate biosorption process on functionalized buckwheat hulls biochar compared to the Langmuir model, while the Elovich model best desc ribed the biosorption kinetics. Desorption of phosphate from the saturated biosorbent surface was attempted using different solvents, but the desorption efficiency was very low (0.13 to 6.06%).
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:109:703305
Study programmeTitle: Food Engineering
Study programme type: university
Study level: graduate
Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka prehrambenog inženjerstva (sveučilišni/a magistar/magistra inženjer/inženjerka prehrambenog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) icon
Created on2024-09-27 07:43:29