Enhanced chlorine dioxide decay in the presence of metal oxides in drinking water distribution systems
|dc.contributor.author||Von Gunten, U.|
|dc.identifier.citation||Liu, C. and Von Gunten, U. and Croué, J. 2013. Enhanced chlorine dioxide decay in the presence of metal oxides: Relevance to drinking water distribution systems, in Proceedings of the Water Quality Technology Conference and Exposition, Nov 3–7 2013. Long Beach, California: American Water Works Association.|
The present study focused on enhanced chlorine dioxide (ClO2) decay in the presence of metal oxides formed in drinking water distribution systems due to metal pipe corrosion phenomena. Chlorine dioxide decays via three pathways: 1) catalytic disproportionation which produces equal molar amounts of chlorite and chlorate, 2) the decay to chlorite and oxygen and 3) oxidation of metals to a higher oxidation state. Cupric oxide (CuO) and nickel oxide (NiO) showed significantly stronger ability to catalyze the ClO2 disproportionation than goethite (a-FeOOH). CuO and NiO also enhanced ClO2 decay to produce chlorite and oxygen. Chlorine dioxide can oxidize cuprous oxide (Cu2O) to CuO, with the release of chlorite. The interaction between metal oxides and chlorine dioxide will raise an issue on how to maintain oxidant residual in drinking water distribution systems.
|dc.title||Enhanced chlorine dioxide decay in the presence of metal oxides in drinking water distribution systems|
|dcterms.source.title||2013 Water Quality Technology Conference and Exposition, WQTC 2013|
|dcterms.source.series||2013 Water Quality Technology Conference and Exposition, WQTC 2013|
|curtin.department||Curtin Water Quality Research Centre|
|curtin.accessStatus||Fulltext not available|
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