prikaz prve stranice dokumenta Uklanjanje arsena(V) iz vode procesom filtracije uronjivim mikrofiltracijskim membranama uz prethodnu adsorpciju
Access restricted to students and staff of home institution
doctoral thesis
Uklanjanje arsena(V) iz vode procesom filtracije uronjivim mikrofiltracijskim membranama uz prethodnu adsorpciju
Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology, 2013. urn:nbn:hr:159:454326
Ćurko, Josip
University of Zagreb
Faculty of Food Technology and Biotechnology

Institutional repository: Repository of the Faculty of Food Technology and Biotechnology

Cite this document

Ćurko, J. (2013). Uklanjanje arsena(V) iz vode procesom filtracije uronjivim mikrofiltracijskim membranama uz prethodnu adsorpciju (Doctoral thesis). Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:159:454326

Ćurko, Josip. "Uklanjanje arsena(V) iz vode procesom filtracije uronjivim mikrofiltracijskim membranama uz prethodnu adsorpciju." Doctoral thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2013. https://urn.nsk.hr/urn:nbn:hr:159:454326

Ćurko, Josip. "Uklanjanje arsena(V) iz vode procesom filtracije uronjivim mikrofiltracijskim membranama uz prethodnu adsorpciju." Doctoral thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2013. https://urn.nsk.hr/urn:nbn:hr:159:454326

Ćurko, J. (2013). 'Uklanjanje arsena(V) iz vode procesom filtracije uronjivim mikrofiltracijskim membranama uz prethodnu adsorpciju', Doctoral thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, accessed 14 May 2024, https://urn.nsk.hr/urn:nbn:hr:159:454326

Ćurko J. Uklanjanje arsena(V) iz vode procesom filtracije uronjivim mikrofiltracijskim membranama uz prethodnu adsorpciju [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology; 2013 [cited 2024 May 14] Available at: https://urn.nsk.hr/urn:nbn:hr:159:454326

J. Ćurko, "Uklanjanje arsena(V) iz vode procesom filtracije uronjivim mikrofiltracijskim membranama uz prethodnu adsorpciju", Doctoral thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, 2013. Available at: https://urn.nsk.hr/urn:nbn:hr:159:454326

Metadata
TitleUklanjanje arsena(V) iz vode procesom filtracije uronjivim mikrofiltracijskim membranama uz prethodnu adsorpciju
Title (english)Removal of arsenic(V) from water by filtration through immersed microfiltration membrane with prior adsorption
AuthorJosip Ćurko
MentorIvan Mijatović (mentor)
Committee memberMarin Matošić (predsjednik povjerenstva)
GranterUniversity of Zagreb
Faculty of Food Technology and Biotechnology
Zagreb
Defense date and country2013-03-11, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Food Technology
Universal decimal classification
(UDC)		628 - Public health engineering. Water. Sanitation. Illuminating engineering
Abstract
Cilj ovog rada bio je utvrditi mogućnost primjene uronjivih membrana pri uklanjanju arsena u pripremi vode za piće, putem adsorpcije na istaloženi željezov hidroksid te naknadne filtracije putem uronjenih mikrofiltracijskih membrana. Adsorpcijske karakteristike istaloženog Fe(OH)3 su uspoređene s drugim komercijalnim adsorbensima pomoću adsorpcijskih izotermi, a najveći kapacitet je primijećen kod istaloženog Fe(OH)3. Tijekom filtriranja različitih koncentracija suspenzija istaloženog Fe(OH)3 u demineraliziranoj vodi, određene su vrijednosti kritičnog fluksa pri čemu je najveća vrijednosti od 250 L/m2 h postignuta pri filtraciji suspenzije s koncentracijom dodanog Fe(III) od 0,344 g/L i protoku zraka za miješanje od 16,83 L/min. Tijekom kontinuiranog uklanjanja arsena(V) iz vodovodne vode u koju je dodano 100 μg/L As(V) uz dozu Fe(III) od 5,16 mg/L i filtracije kroz uronjive mikrofiltracijske membrane, koncentracija arsena u permeatu bila je uvijek ispod 10 μg/L. Tijekom kontinuiranog uklanjanja arsena(V) membrane nisu bile relaksirane ili čišćene, a fluks je iznosio 60 L/m2 h. Permeabilnost membrane na kraju pokusa se smanjila za 62%. Ukupnom otporu filtracije najviše je doprinio otpor začepljene membrane od 50% zbog istaloženog kamenca na površini i unutar pora membrane, a otpor kolača pridonio je 15% kada je koncentracija suspendirane tvari u reaktoru iznosila 8,85 g/L. Početna permeabilnost membrana postignuta je nakon pokusa filtracije pranjem u 1% oksalnoj kiselini.
Abstract (english)
The aim of this study was to determine the possibility of using immersed membranes in removing arsenic from spiked tap water, through adsorption on precipitated iron hydroxide and subsequent filtration through immersed microfiltration membranes. Adsorption capacities of precipitated Fe(OH)3 were determined and compared with other adsorbents by calculating the adsorption isotherms, and the highest capacity was observed in precipitated Fe(OH)3. During filtration of precipitated Fe(OH)3 suspensions in demineralized water, critical fluxes were determined for a different suspended matter concentrations and mixing conditions. The highest value of 250 L/m2 h was achieved by filtrating suspension of 0.344 g Fe(III)/L and at airflow rate of 16.83 L/min. During a continuous experiment for 21 days in a reactor with an immersed membrane, tap water was spiked with 100 μg/L of As(V) and treated with 5.16 mg Fe(III)/L and the concentration of As(V) in treated water was always under 10 μg/L. The configuration of the membrane allowed the maintaining of a high permeate flux of 60 L/m2 h. Membrane fouling was mostly caused by the precipitation of scale on the membrane surface and into the membrane pores, which contributed 50% to the total resistance. Cake resistance contribution to total resistance was low and reached 15% at the end of the experiment when suspended matter in the reactor reached 8.85 g/L. The initial permeability of the membrane could be restored by chemical cleaning with oxalic acid.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:159:454326
Promotion2014-07-06
Study programmeTitle: Food Technology
Study programme type: university
Study level: postgraduate
Academic / professional title: doktor/doktorica znanosti (doktor/doktorica znanosti)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
Terms of useLicence In copyright icon
Created on2018-05-17 10:24:40