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Paracetamol Mineralization by Advanced Electrochemical Oxidation Processes for Wastewater Treatment

Paracetamol Mineralization by Advanced Electrochemical Oxidation Processes for Wastewater Treatment Environmental Context. Even after passing through water treatment plants, discarded pharmaceuticals have been linked with poisoning aquatic life. A simple and reliable method for treating household wastewater would alleviate this issue. Using the common pain reliever paracetamol as a model, the simple combination of dissolved iron and copper with ultraviolet light is shown to fully decompose (‘mineralize’) this drug into simple inorganic components, which represents an improvement over current treatments with ozone or peroxides, that achieve only partial mineralization. Abstract. Paracetamol solutions at pH 3.0 have been efficiently mineralized by environmentally clean electrochemical methods such as electro-Fenton and photoelectro-Fenton processes using a cell with a Pt anode and an O 2 -diffusion cathode for H 2 O 2 electrogeneration. This species reacts with added Fe 2+ giving hydroxyl radical as main oxidant. Photoelectro-Fenton with Fe 2+ , Cu 2+ , and UVA light as catalysts leads to complete mineralization due to the removal of the final carboxylic acids (oxalic and oxamic). When catalysts are used separately, both acids or part of them remain in solution, giving a partial (> 65%) mineralization. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Environmental Chemistry CSIRO Publishing

Paracetamol Mineralization by Advanced Electrochemical Oxidation Processes for Wastewater Treatment

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References (13)

Publisher
CSIRO Publishing
Copyright
CSIRO
ISSN
1448-2517
eISSN
1449-8979
DOI
10.1071/EN04018
Publisher site
See Article on Publisher Site

Abstract

Environmental Context. Even after passing through water treatment plants, discarded pharmaceuticals have been linked with poisoning aquatic life. A simple and reliable method for treating household wastewater would alleviate this issue. Using the common pain reliever paracetamol as a model, the simple combination of dissolved iron and copper with ultraviolet light is shown to fully decompose (‘mineralize’) this drug into simple inorganic components, which represents an improvement over current treatments with ozone or peroxides, that achieve only partial mineralization. Abstract. Paracetamol solutions at pH 3.0 have been efficiently mineralized by environmentally clean electrochemical methods such as electro-Fenton and photoelectro-Fenton processes using a cell with a Pt anode and an O 2 -diffusion cathode for H 2 O 2 electrogeneration. This species reacts with added Fe 2+ giving hydroxyl radical as main oxidant. Photoelectro-Fenton with Fe 2+ , Cu 2+ , and UVA light as catalysts leads to complete mineralization due to the removal of the final carboxylic acids (oxalic and oxamic). When catalysts are used separately, both acids or part of them remain in solution, giving a partial (> 65%) mineralization.

Journal

Environmental ChemistryCSIRO Publishing

Published: Jun 30, 2004

Keywords: catalysis — drugs — electrochemistry — oxidation — water treatment

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