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Title:Učinkovitost razgradnje bisfenola A po hidrotermičnem procesiranju odpadne vode
Authors:ID Seitl, Maša (Author)
ID Knez Marevci, Maša (Mentor) More about this mentor... New window
ID Kotnik, Petra (Comentor)
Files:.pdf MAG_Seitl_Masa_2018.pdf (2,98 MB)
MD5: C345F84AC215B2E878579F7757F2D6B3
PID: 20.500.12556/dkum/6a51830e-c19c-4726-a4b3-5e18dbc8752b
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Namen magistrskega dela je bil s sub- in superkritično oksidacijo v vodi degradirati bisfenol A (BPA). Poleg koncentracije BPA smo v vzorcih pri optimalnih pogojih preverjali tudi prisotnost oz. zmanjšanje organskih snovi z določanjem kemijske potrebe po kisiku (KPK) in celotnega organskega ogljika (TOC). S spreminjanjem glavnih parametrov pri hidrotermičnem procesiranju vode – temperature, tlaka in pretoka raztopine, smo z začetnimi poskusi v ultra čisti vodi najprej želeli določiti optimalne pogoje za obdelavo vzorcev z dodanim BPA. Najboljše rezultate smo dosegli s superkritično oksidacijo pri T = 500 °C, p = 275 bar in ϕV = 1,5 mL/min, kjer smo dosegli popolno degradacijo bisfenola A. Z izbranimi (optimalnimi) pogoji pri posameznih temperaturah smo nato hidrotermično obdelali še vzorce sintetične odpadne vode v katero smo dodali BPA. Tudi tokrat smo najvišjo, 99,5 %, degradacijo dosegli pri že prej navedenih pogojih. Pri teh pogojih smo dosegli tudi najvišja odstotka znižanja vrednosti KPK in TOC in sicer 62,32 % pri vrednosti KPK ter 18,03 % pri vrednosti TOC. Ugotovili smo, da je BPA zelo odporen na zunanje vplive in da je za njegovo degradacijo v vodi bolj primerna superkritična, kot pa subkritična oksidacija, le-ta pa mora potekati pri zelo ostrih pogojih (visoka temperatura in tlak) ter dolgih zadrževalnih časih v sistemu.
Keywords:bisfenol A, degradacija, hidrotermično procesiranje, subkritična oksidacija, superkritična oksidacija, odpadna voda
Place of publishing:Maribor
Publisher:[M. Seitl]
Year of publishing:2018
PID:20.500.12556/DKUM-71024 New window
UDC:628.16:66.094.3(043.2)
COBISS.SI-ID:21601814 New window
NUK URN:URN:SI:UM:DK:Z8T7RELL
Publication date in DKUM:13.07.2018
Views:1859
Downloads:193
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:02.07.2018

Secondary language

Language:English
Title:Degradation efficiency of bisphenol A by hydrothermal treatment of wastewater
Abstract:The purpose of this master's thesis was to degrade bisphenol A (BPA) in sub- and supercritical water. In addition to BPA concentration, the presence of organic substances or their reduction in samples under optimal conditions was examined by determining the chemical oxygen demand (COD) and total organic carbon (TOC). By changing the main parameters in hydrothermal water processing - the temperature, pressure and solution flow, we sought to determine the optimal conditions for the treatment of BPA spiked samples using initial experiments in ultra-pure water. The best results were attained by supercritical oxidation at T = 500 °C, p = 275 bar and ϕV = 1.5 mL/min, where complete degradation of bisphenol A was achieved. Under the experimentally determined optimal conditions at each temperature, the synthetic BPA spiked water samples were hydrothermally treated. Similarly, the highest, 99.5 % degradation was attained under previously stated conditions. The highest percentage of COD and TOC reduction, 62.32 % and 18.03 % respectively, was also achieved under these conditions. It has been ascertained that BPA is highly resistant to external impacts and that supercritical oxidation is more suitable for its degradation than subcritical oxidation. The process must be carried out under very harsh conditions (high temperature and pressure) and long system retention times.
Keywords:bisphenol A, degradation, hydrothermal treatment, subcritical oxidation, supercritical oxidation, wastewater


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