Formation of Bromate and Chlorate during Ozonation and Electrolysis in Seawater for Ballast Water Treatment

Youmi Jung; Eunkyung Hong; Yeojoon Yoon; Minhwan Kwon; Joon Wun Kang

doi:10.1080/01919512.2014.956862

Formation of Bromate and Chlorate during Ozonation and Electrolysis in Seawater for Ballast Water Treatment

Youmi Jung, Eunkyung Hong, Yeojoon Yoon, Minhwan Kwon, Joon Wun Kang

Division of Environmental Engineering

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

Many effective technologies have been developed and approved for ballast water treatment, and the effectiveness of a process should be evaluated considering its environmental friendliness. The aim of this study was to evaluate the formation and formation mechanisms of bromate (BrO₃⁻) and chlorate (ClO₃⁻) in seawater during ozonation, electrolysis, and a combined (ozonation/electrolysis) process. In seawater ozonation, BrO₃⁻ was generated exceeding a 5 mg/L ozone dose despite the high Br⁻ (65 mg/L). The formation of BrO₃⁻ and ClO₃⁻ by electrolysis depended on the electrode materials where two types of electrodes (IrO₂/Ti and Pt/Ti) were used. The combined (ozonation/electrolysis) process generated much higher levels of BrO₃⁻ and ClO₃⁻ than either individual process. In ozonation or electrolysis, mixed oxidant including HOCl/OCl⁻ and HOBr/OBr⁻ is the main parameter for inactivation, which is called total residual oxidant, TRO. In this study, a predictive model for BrO₃⁻ and ClO₃⁻ was suggested in terms of TRO formation. This predictive model can recommend allowable TRO (generated by ozonation or electrolysis) for practical applications in seawater treatment.

Original language	English
Pages (from-to)	515-525
Number of pages	11
Journal	Ozone: Science and Engineering
Volume	36
Issue number	6
DOIs	https://doi.org/10.1080/01919512.2014.956862
Publication status	Published - 2014 Nov 15

Bibliographical note

Funding Information:
This work is supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (2013R1A2A2A05006466) and Korea Ministry of Education (MOE) as “BK21 PLUS Project.”

Publisher Copyright:
© 2014, Copyright © 2014 International Ozone Association.

All Science Journal Classification (ASJC) codes

Environmental Engineering
Environmental Chemistry

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10.1080/01919512.2014.956862

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title = "Formation of Bromate and Chlorate during Ozonation and Electrolysis in Seawater for Ballast Water Treatment",

abstract = "Many effective technologies have been developed and approved for ballast water treatment, and the effectiveness of a process should be evaluated considering its environmental friendliness. The aim of this study was to evaluate the formation and formation mechanisms of bromate (BrO3−) and chlorate (ClO3−) in seawater during ozonation, electrolysis, and a combined (ozonation/electrolysis) process. In seawater ozonation, BrO3− was generated exceeding a 5 mg/L ozone dose despite the high Br− (65 mg/L). The formation of BrO3− and ClO3− by electrolysis depended on the electrode materials where two types of electrodes (IrO2/Ti and Pt/Ti) were used. The combined (ozonation/electrolysis) process generated much higher levels of BrO3− and ClO3− than either individual process. In ozonation or electrolysis, mixed oxidant including HOCl/OCl− and HOBr/OBr− is the main parameter for inactivation, which is called total residual oxidant, TRO. In this study, a predictive model for BrO3− and ClO3− was suggested in terms of TRO formation. This predictive model can recommend allowable TRO (generated by ozonation or electrolysis) for practical applications in seawater treatment.",

author = "Youmi Jung and Eunkyung Hong and Yeojoon Yoon and Minhwan Kwon and Kang, {Joon Wun}",

note = "Funding Information: This work is supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (2013R1A2A2A05006466) and Korea Ministry of Education (MOE) as “BK21 PLUS Project.” Publisher Copyright: {\textcopyright} 2014, Copyright {\textcopyright} 2014 International Ozone Association.",

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Formation of Bromate and Chlorate during Ozonation and Electrolysis in Seawater for Ballast Water Treatment

Abstract

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