Removal of formaldehyde from aqueous solutions via oxygen reduction using a reticulated vitreous carbon cathode cell
Removal of formaldehyde from aqueous solutions via oxygen reduction using a reticulated vitreous carbon cathode cell
The removal of formaldehyde from waste streams to <0.3 ppm has been demonstrated using a cell with a reticulated vitreous carbon cathode; the formaldehyde is oxidized by hydrogen peroxide, formed at the cathode by reduction of oxygen. In most electrolytes studied (e.g. NaOH, NaCl and Na2SO4), the formaldehyde is oxidised only to formic acid. On the other hand, the addition of a low concentration of an iron salt (i.e. 0.5 mm), catalyses the complete oxidation to carbon dioxide. The removal of formaldehyde can be achieved in media of low ionic strength (< 10 mm) although the use of iron salts necessitates the adjustment of pH to 3 to maintain the catalyst in solution.
formaldehyde, 3-dimensional electrodes, reticulated vitreous carbon, flow cell
307-314
Ponce de Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
April 1995
Ponce de Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Ponce de Leon, Carlos and Pletcher, Derek
(1995)
Removal of formaldehyde from aqueous solutions via oxygen reduction using a reticulated vitreous carbon cathode cell.
Journal of Applied Electrochemistry, 25 (4), .
(doi:10.1007/BF00249648).
Abstract
The removal of formaldehyde from waste streams to <0.3 ppm has been demonstrated using a cell with a reticulated vitreous carbon cathode; the formaldehyde is oxidized by hydrogen peroxide, formed at the cathode by reduction of oxygen. In most electrolytes studied (e.g. NaOH, NaCl and Na2SO4), the formaldehyde is oxidised only to formic acid. On the other hand, the addition of a low concentration of an iron salt (i.e. 0.5 mm), catalyses the complete oxidation to carbon dioxide. The removal of formaldehyde can be achieved in media of low ionic strength (< 10 mm) although the use of iron salts necessitates the adjustment of pH to 3 to maintain the catalyst in solution.
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Removal_of_HCHO.pdf
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Submitted date: 11 March 1994
Published date: April 1995
Keywords:
formaldehyde, 3-dimensional electrodes, reticulated vitreous carbon, flow cell
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 54608
URI: http://eprints.soton.ac.uk/id/eprint/54608
PURE UUID: f6cb37b5-e638-45c0-b962-8abf3f87e99a
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Date deposited: 01 Aug 2008
Last modified: 16 Mar 2024 03:43
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