TY - JOUR
T1 - A kinetic study of ozone decay and bromine formation in saltwater ozonation
T2 - Effect of O3dose, salinity, pH, and temperature
AU - Jung, Youmi
AU - Hong, Eunkyung
AU - Kwon, Minhwan
AU - Kang, Joon Wun
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017
Y1 - 2017
N2 - Saltwater ozonation is used to remove invasive or pathogenic organisms from ballast water and water in the aquaculture industry. Ozone chemistry in saltwater is considerably different to that in freshwater. In saltwater, ozone rapidly decomposes to produce bromine, which is a main disinfectant in saltwater ozonation. It is very difficult to separate ozone and bromine in saltwater ozonation. In this study, we developed a model for prediction of residual ozone and bromine concentrations, and applied this model to calculate Ct value (Concentration of disinfectant × Contact time) for disinfection. The contributions of ozone-Ct and bromine-Ct to organism removal were studied using the zooplankton, Artemia salina. Interestingly, the removal efficiency of saltwater ozonation for A. salina (47%) was the same as the sum of the removal efficiencies for bromine (32%) and ozone (14%) used on their own. This indicates that both bromine and trace ozone kill A. salina during saltwater ozonation. The prediction model for residual ozone and bromine formation was verified in different ozone dose, water salinity, pH, and temperature, which affect ozone decomposition and bromine formation.
AB - Saltwater ozonation is used to remove invasive or pathogenic organisms from ballast water and water in the aquaculture industry. Ozone chemistry in saltwater is considerably different to that in freshwater. In saltwater, ozone rapidly decomposes to produce bromine, which is a main disinfectant in saltwater ozonation. It is very difficult to separate ozone and bromine in saltwater ozonation. In this study, we developed a model for prediction of residual ozone and bromine concentrations, and applied this model to calculate Ct value (Concentration of disinfectant × Contact time) for disinfection. The contributions of ozone-Ct and bromine-Ct to organism removal were studied using the zooplankton, Artemia salina. Interestingly, the removal efficiency of saltwater ozonation for A. salina (47%) was the same as the sum of the removal efficiencies for bromine (32%) and ozone (14%) used on their own. This indicates that both bromine and trace ozone kill A. salina during saltwater ozonation. The prediction model for residual ozone and bromine formation was verified in different ozone dose, water salinity, pH, and temperature, which affect ozone decomposition and bromine formation.
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U2 - 10.1016/j.cej.2016.11.113
DO - 10.1016/j.cej.2016.11.113
M3 - Article
AN - SCOPUS:85028244527
VL - 312
SP - 30
EP - 38
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
ER -