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Title:Zniževanje KPK v odpadni vodi s Fentonovim reagentom
Authors:ID Kuster, Bernarda (Author)
ID Simonič, Marjana (Mentor) More about this mentor... New window
ID Novak Pintarič, Zorka (Comentor)
Files:.pdf MAG_Kuster_Bernarda_2017.pdf (1,65 MB)
MD5: 77B0781D274D5D6E0FB7ECFC67435065
PID: 20.500.12556/dkum/383d6ada-855b-4fd2-8ccb-b5c1475dafe3
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Cilj magistrske naloge je bil ugotoviti, ali je z uporabo Fentonovega reagenta mogoče znižati onesnaženost odpadne vode z organskimi spojinami, izraženo s kemijsko potrebo po kisiku (KPK). Fentonov reagent pomeni reakcijo med železovimi ioni Fe2+ in vodikovim peroksidom, pri čemer nastanejo visoko reaktivni hidroksilni radikali, ki razgrajujejo organske spojine. Pripravili smo sintetične vzorce odpadne vode s huminsko kislino in tioureo. V nadaljevanju smo čistili tudi realno kompostno izcedno vodo. Eksperimente smo izvajali pri različnih pogojih Fentonove reakcije, tako da smo spreminjali maso FeSO4 × 7H2O, ki smo ga uporabili kot vir Fe2+, razmerje med reagenti, čas trajanja reakcije in pH-vrednost. Učinek čiščenja smo v glavnem spremljali z merjenjem KPK, absorbance in motnosti. Ugotovili smo, da je bila Fentonova reakcija primerna za čiščenje sintetičnih vzorcev odpadne vode s huminsko kislino in kompostne izcedne vode, medtem ko za sintetične vzorce odpadne vode s tioureo znižanja KPK nismo dosegli. Najbolj učinkovito znižanje KPK je pri obdelavi sintetične odpadne vode s huminsko kislino znašalo 97,40 %, dosegli pa smo ga pri pogojih reakcije: "mFeSO4 × 7H2O " = 0,2 g, "nFeSO4 × 7H2O∶ nH2O2 " = 1 : 3, pH = 3, t = 60 min. Najučinkovitejše znižanje KPK pri obdelavi kompostne izcedne vode je doseglo 64,08 % pri pogojih reakcije: "mFeSO4 × 7H2O " = 0,6 g, "nFeSO4 × 7H2O∶ nH2O2 " = 1 : 5, pH = 4,5, t = 30 min.
Keywords:odpadna voda, huminska kislina, tiourea, kompostna voda, kemijska potreba po kisiku, Fentonov reagent.
Place of publishing:Maribor
Publisher:[B. Kuster]
Year of publishing:2017
PID:20.500.12556/DKUM-67673 New window
UDC:628.179.2(043.2)
COBISS.SI-ID:21028886 New window
NUK URN:URN:SI:UM:DK:P4KDWWRF
Publication date in DKUM:22.11.2017
Views:1906
Downloads:276
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:27.08.2017

Secondary language

Language:English
Title:Decreasing of COD in wastewater with Fenton's reagent
Abstract:The aim of the master thesis was to determine whether the use of Fenton's reagent can reduce pollution of wastewater with organic compounds, expressed as the chemical oxygen demand (COD). Fenton's reagent means the reaction between iron ions Fe2+ and hydrogen peroxide, whereby highly reactive hydroxyl radicals, which decompose organic compounds are formed. We prepared synthetic wastewater samples containing humic acid and thiourea. Hereinafter, we also cleaned a real compost leachate. Experiments were carried out under different conditions of Fenton's reaction by varying the ratio of the reagents, the reaction time, the pH value and the mass of FeSO4 × 7H2O, which was used as a source of Fe2+. The cleaning efficiency was mainly monitored by measuring COD, absorbance and turbidity. We have found that Fenton's reaction was suitable for treatment of synthetic wastewater containing humic acid and for treatment of compost leachate, while in the case of synthetic wastewater containing thiourea COD reduction was not achieved. The maximum reduction of COD for the treatment of wastewater containing humic acid stood at 97.40%, achieved at following conditions: "mFeSO4 × 7H2O " = 0,2 g, "nFeSO4 × 7H2O∶ nH2O2 " = 1 : 3, pH = 3, t = 60 min. The maximum reduction of COD for the treatment of compost leachate has reached 64.08 % at the reaction conditions: "mFeSO4 × 7H2O " = 0,6 g, "nFeSO4 × 7H2O∶ nH2O2 " = 1 : 5, pH = 4,5, t = 30 min.
Keywords:wastewater, humic acid, thiourea, compost leachate, chemical oxygen demand, Fenton's reagent.


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