Courtesy of:  Ozone: Science & Engineering  The Journal of the International Ozone Association

Authors: Keisuke Ikehata, Ling Wang-Staley, Xiaoyan Qu & Yuan Li

ABSTRACT:

Ozonation and four types of advanced oxidation processes, including O₃/H₂O₂, O₃/UV, O₃/H₂O₂/UV, and UV/H₂O₂, were evaluated for the treatment of contaminated groundwater at a Superfund site in Simpsonville, South Carolina using bench-scale, batch ozone and UV apparatuses. Although the contaminants of concern were 1,4-dioxane, 1,1-dichloroethene, and trichloroethene, several other chlorinated organics as well as tetrahydrofuran were found in the groundwater samples. The O₃/H₂O₂ treatment with O₃ and H₂O₂ doses of 6 and 1.5 mg/L, respectively, and the UV/H₂O₂ treatment with UV and H₂O₂ doses of 1,000 mJ/cm and 20 mg/L, respectively, were sufficient to degrade 200 µg/L of 1,4-dioxane, 110 µg/L of 1,1-dichloroethene, and 10 µg/L of trichloroethene below their performance standards of 10, 7, and 4 µg/L, respectively. Due to a high bromide concentration (0.35 mg/L) in the groundwater sample, bromate formation was found to be significant in ozone-based treatment, including O₃/H₂O₂.

Link to Full Paper below:

https://www.tandfonline.com/doi/abs/10.1080/01919512.2016.1198686

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