PublicationWater Advanced Treatment & Environmental Research Laboratory

Continuous determination of hydrogen peroxide formed in advanced oxidation and electrochemical processes
Year
2012
First author
Tae-Mun Hwang
Co-author
Byung Soo Oh, Yeojoon Yoon, Minhwan Kwon
Corresponding author
Joon-Wun Kang
Journal
Desalination and Water Treatment
Vol
43(1-3)
Page
267-273
Status
[Published in Ozone & AOP Lab]
Abstract
A hydrogen peroxide (H₂O₂) auto-analyzer was developed to continuously detect H₂O₂ present in water, using a flow injection analysis (FIA) technique, during several advanced oxidation processes (AOPs) involving H₂O₂, such as ozone/H₂O₂, UV/H₂O₂, and ozone/UV, and an electrochemical process. The analytical method was based on a fluorometric method, using the reaction of p-hydroxyphenyl acetic acid and H₂O₂ in the presence of peroxidase enzyme. H₂O₂ was analyzed within the high (100–2,000 μg/L) and low (0–500 μg/L) concentration ranges, using both long and short reaction coils, respectively. The standard deviation and detection limit were 0.5 and 1.6 μg/L, respectively, and the coefficient of variation at 1 μg/L was 7.8%. This study also investigated the effects of Na₂S₂O₃ and NH₄Cl, which were used to quench the ozone and hypochlorous acid (HOCl) present in the samples, on the measurement of H₂O₂ during the ozone-based AOPs and electrochemical process.