Degradation of 2,6-dichloro-1,4-benzoquinone by advanced oxidation with UV, H2O2, and O3: parameter optimization and model building
| Autor: | Mei Li, Shaohua Sun, Pan Zhangbin, Li Guifang, Wang Yongqiang, Ruibao Jia, Xiaokang Zhu, Li'an Hou |
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| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
Chemistry Health Toxicology and Mutagenesis drinking water halogenated benzoquinone 2 6-dichloro-1 4-benzoquinone Photochemistry Environmental technology. Sanitary engineering Environmental sciences 1 4-Benzoquinone chemistry.chemical_compound Degradation (geology) GE1-350 box–behnken design degradation pathway Model building TD1-1066 Water Science and Technology |
| Zdroj: | Aqua, Vol 70, Iss 8, Pp 1159-1169 (2021) |
| ISSN: | 1605-3974 0003-7214 |
| DOI: | 10.2166/aqua.2021.026 |
| Popis: | Halobenzoquinones are disinfection by-products with cytotoxicity, carcinogenicity, and genotoxicity. In this study, we investigated the removal of the HBQ 2,6-dichloro-1,4-benzoquinone (DCBQ) from water using advanced oxidation processes. The removal of DCBQ from water using UV, H2O2, and O3 advanced oxidation processes individually was not ideal with removal rates of 36.1% with a UV dose of 180 mJ/cm2, 32.0% with 2 mg/L H2O2, and 57.9% with 2 mg/L O3. Next, we investigated using the combined UV/H2O2/O3 advanced oxidation process to treat water containing DCBQ. A Box–Behnken design was used to optimize the parameters of the UV/H2O2/O3 process, which gave the following optimum DCBQ removal conditions: UV dose of 180 mJ/cm2, O3 concentration of 0.51 mg/L, and H2O2 concentration of 1.76 mg/L. The DCBQ removal rate under the optimum conditions was 94.3%. We also found that lower humic acid concentrations promoted DCBQ degradation, while higher humic acid concentrations inhibited DCBQ degradation. HIGHLIGHTS Box–Behnken design (BBD) was used to optimize the parameters of UV/H2O2/O3 process for the degradation of 2,6-dichloro-1,4-benzoquinone (DCBQ). A secondary model was developed to eliminate DCBQ to the maximum extent.; The combined UV/H2O2/O3 process proposed in this study can be used to control the by-products of halogenated benzoquinone disinfection in water plant. |
| Databáze: | OpenAIRE |
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