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undergraduate thesis
Određivanje optimalnog vremena za postizanje prihvatljive koncentracije koloidnog srebra pomoću generatora niskog napona
završni rad
2017. urn:nbn:hr:167:874954
Plavčić, Marija
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

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Plavčić, M. (2017). Određivanje optimalnog vremena za postizanje prihvatljive koncentracije koloidnog srebra pomoću generatora niskog napona : završni rad (Undergraduate thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:874954

Plavčić, Marija. "Određivanje optimalnog vremena za postizanje prihvatljive koncentracije koloidnog srebra pomoću generatora niskog napona : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, 2017. https://urn.nsk.hr/urn:nbn:hr:167:874954

Plavčić, Marija. "Određivanje optimalnog vremena za postizanje prihvatljive koncentracije koloidnog srebra pomoću generatora niskog napona : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, 2017. https://urn.nsk.hr/urn:nbn:hr:167:874954

Plavčić, M. (2017). 'Određivanje optimalnog vremena za postizanje prihvatljive koncentracije koloidnog srebra pomoću generatora niskog napona : završni rad', Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, accessed 03 March 2025, https://urn.nsk.hr/urn:nbn:hr:167:874954

Plavčić M. Određivanje optimalnog vremena za postizanje prihvatljive koncentracije koloidnog srebra pomoću generatora niskog napona : završni rad [Undergraduate thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2017 [cited 2025 March 03] Available at: https://urn.nsk.hr/urn:nbn:hr:167:874954

M. Plavčić, "Određivanje optimalnog vremena za postizanje prihvatljive koncentracije koloidnog srebra pomoću generatora niskog napona : završni rad", Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, Split, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:167:874954

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Metadata
TitleOdređivanje optimalnog vremena za postizanje prihvatljive koncentracije koloidnog srebra pomoću generatora niskog napona : završni rad
Title (english)Assessment of optimal time needed for achieving sufficient concentration of colloidal silver using low voltage generator : bachelor thesis
AuthorMarija Plavčić
MentorPero Dabić (mentor)
Committee memberLadislav Vrsalović (predsjednik povjerenstva)
Committee memberDamir Barbir (član povjerenstva)
Committee memberPero Dabić (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
(Division of Engineering and Chemistry)
Split
Defense date and country2017-12-14, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
U radu su određivani optimalni parametri elektrolitičke sinteze koloidnog srebra prihvatljive koncentracije uz različito vrijeme trajanja procesa, pomoću generatora niskog napona istosmjerne struje, (eng. Low Voltage Direct Current, LVDC). Generator koloidnog srebra ima mogućnost održavanja konstantne jakosti struje te je potrebno odrediti najpovoljniju jakost struje za korištene srebrne elektrode, a da se zadovolji potrebna gustoća struje pri kojoj se može dobiti koloidno srebro koncentracije 20-30 ppm-a u vremenu do dva sata. Pri provođenju sinteze svakih 5 minuta bilježene su vrijednosti TDS-a, specifične električne provodnosti i temperature pomoću digitalnog umjerenog uređaja HANA-EDGE. Propuštanjem laserske zrake kroz ćeliju pratila se pojava Tyndallovog efekta, bilježeno je vrijeme pojave te intenzitet Tyndallovog efekta. Pri upotrebi ultračiste vode nisu dobivene potrebne koncentracije koloidnog srebra za zadano vrijeme, a dodatkom nekoliko ppm-a NaCl tražene koncentracije koloidnog srebra postignute su nakon 45 minuta provedbe procesa.
Abstract (english)
Aim of this thesis was to determine optimal parameters for electrolytical synthesis of colloidal silver with sufficient concentration by varying duration of process, using low voltage direct current (LVDC) generator. Colloidal silver generator has ability of maintaining constant power of the electric current, and it is necessary to determine optimal value of power of the electric current for used silver electrodes, in order to meet the requiered electric current density at which it is possible to produce colloidal silver of 20-30 ppm concentration within two hours. While conducting the synthesis values of TDS, specific electrical conductivity and temperature are recorded every 5 minutes using calibrated digital device HANA-EDGE. Apearance of Tyndall's effect was being tracked by directing laser beam through electrolytic cell, and time of appearance and intensity are being recorded. With use of ultra pure water required concentrations were not gained in the default time, and by adding a few ppm of NaCl required concentrations were accomplished within 45 minutes of process.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:874954
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
Terms of useLicence In copyright icon
Public noteKljučne riječi doradio knjižničar/ Key words are revised by the librarian
Created on2018-03-08 11:39:54