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Chemical pretreatment of formaldehyde wastewater by selected Advanced Oxidation Processes (AOPs)

Chemical pretreatment of formaldehyde wastewater by selected Advanced Oxidation Processes (AOPs)
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189.67 kB
Author:
Paweł Kowalik
Date:
13 August 2013
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Abstract: Chemical oxidation processes: Fenton process and catalytic ozonation with Mn2+ ions were investigated for eff ectiveness of formaldehyde (FA) oxidation. Th e infl uence of operational variables — O3, H2O2, Mn2+ and Fe2+ concentrations and reaction time were investigated. Researches were carried out on aqueous solution of FA, which concentration was 500 mg/l. Fenton  process was investigated at pH 3 and catalytic ozonation at pH 7, 10 and 12. Results revealed that Fenton process was much more eff ective in FA degradation than catalytic ozonation with Mn2+ as a catalyst. Th e optimal H2O2/Fe2+ dosage for a Fenton process was 2000/1000 mg/l. COD and FA concentrations were reduced 59,6% and 79,5%. In case of catalytic ozonation with Mn2+ the eff ectiveness was much less and it was the biggest at pH 12 and Mn2+ dosage 25 mg/l where COD and FA concentration were reduced 14% and 38%. Th erefore, Fenton process can be promising technology for FA wastewater pretreatment.

Area: Natural Science

BibTeX:

@article{Kowalik2011,
  author = {Paweł Kowalik},
  title = {Chemical pretreatment of formaldehyde wastewater by selected Advanced Oxidation Processes (AOPs)},
  journal = {Challenges of Modern Technology},
  year = {2011},
  volume = {2},
  number = {4},
  pages = {42--48},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/66-chemical-pretreatment-of-formaldehyde-wastewater-by-selected-advanced-oxidation-processes-aops}
}
 
 

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