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Electrochemical degradation of the Metamitron from model wastewater
Authors: Dušek Libor | Balcar Lukáš | Vojs Marian
Year: 2014
Type of publication: článek ve sborníku
Name of source: Sborník abstrakt a plných textů ICCT 2014
Publisher name: Česká společnost průmyslové chemie
Place: Praha
Page from-to: 27-31
Titles:
Language Name Abstract Keywords
cze Elektrochemická degradace Metamitronu z modelových odpadních vod Práce se zabývá nepřímou elektrochemickou oxidací Metamitronu v prostředí NaCl, kdy je herbicid oxidovám podle pH chlornanem či kyselinou chlornou. Nejvyšší pokles CHSK byl pozorovám při pH 3 (95,5%), zatímco při pH 4 byl pokles pouze cca 92%. Na druhou stranu při tomto pH byl pozorovám vyšší pokles TOC (78,6%), zatímco pži pH 2 byl pouze 64%. Bylo zjištěno, že během nepřímé elektrooxidace Metamitronu vznikají adsorbovatelné organické halogenidy (AOX) a byl studována závislost jejich koncentrace na pH, obsahu NaCl a použité proudové hustotě. Metamitron; nepřímá elektrochemická oxidace; elektrochemie
eng Electrochemical degradation of the Metamitron from model wastewater Metamitron contains a carbonyl function and is susceptible to photolysis in solar light 5, 6. Photodeamination of metamitron was only observed in water and in the presence of oxygen 7. Unfortunately, the oxygen content in groundwater is low and the degradation rate of the herbicide in this case is low.During electrolysis, chlorine/hypochlorite is produced by anodic oxidation of chloride, and it would be converted to chloride as the pollutant has been oxidized. Then the chloride would be anodically oxidized to form chlorine/hypochlorite, which oxidizes the polutant again. The highest COD removal (95,5 %) was observed at pH 3, while COD removal at pH 4 was only about 92%. On the other hand, that the highest TOC removal (78,6 %) was observed at pH 4, while TOC removal at pH 2 was only 64%. Adsorbable organic halogens (AOX) formed during indirect electrochemical oxidation of metamitrone in presence of sodium chloride. AOX values increased with increasing pH environment Metamitron; electrochemistry; indirect oxidation

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