TY - GEN
T1 - Enhanced chlorine dioxide decay in the presence of metal oxides in drinking water distribution systems
AU - Liu, Chao
AU - von Gunten, Urs
AU - Croue, Jean-Philippe
N1 - KAUST Repository Item: Exported on 2020-12-29
PY - 2013/12/23
Y1 - 2013/12/23
N2 - 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 (α-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. © 2013 American Water Works Association AWWA WQTC Conference Proceedings All Rights Reserved.
AB - 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 (α-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. © 2013 American Water Works Association AWWA WQTC Conference Proceedings All Rights Reserved.
UR - http://hdl.handle.net/10754/666693
UR - https://research.kaust.edu.sa/en/publications/enhanced-chlorine-dioxide-decay-in-the-presence-of-metal-oxides-i
UR - http://www.scopus.com/inward/record.url?scp=84890537867&partnerID=8YFLogxK
M3 - Conference contribution
BT - 2013 Water Quality Technology Conference and Exposition, WQTC 2013
ER -