1,4-dioxane degradation using a pulsed switching peroxi-coagulation process
Widely used in chemical product manufacture, 1,4-dioxane is one of the emerging contaminants, and it poses great risk to human health and the ecosystem. The aim of this study was to degrade 1,4-dioxiane using a pulsed switching peroxi-coagulation (PSPC) process. The electrosynthesis of H2O2 on catho...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2021-06-01
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| Series: | Water Reuse |
| Subjects: | |
| Online Access: | http://jwrd.iwaponline.com/content/11/2/268 |
| _version_ | 1818925259124899840 |
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| author | Yaobin Lu Hualei Shi Jialiang Yao Guangli Liu Haiping Luo Renduo Zhang |
| author_facet | Yaobin Lu Hualei Shi Jialiang Yao Guangli Liu Haiping Luo Renduo Zhang |
| author_sort | Yaobin Lu |
| collection | DOAJ |
| description | Widely used in chemical product manufacture, 1,4-dioxane is one of the emerging contaminants, and it poses great risk to human health and the ecosystem. The aim of this study was to degrade 1,4-dioxiane using a pulsed switching peroxi-coagulation (PSPC) process. The electrosynthesis of H2O2 on cathode and Fe2+ production on iron sacrifice anode were optimized to enhance the 1,4-dioxane degradation. Under current densities of 5 mA/cm2 (H2O2) and 1 mA/cm2 (Fe2+), 95.3 ± 2.2% of 200 mg/L 1,4-dioxane was removed at the end of 120 min operation with the optimal pulsed switching frequency of 1.43 Hz and pH of 5.0. The low residual H2O2 and Fe2+ concentrations were attributed to the high pulsed switching frequency in the PSPC process, resulting in effectively inhibiting the side reaction during the ·OH production and improving the 1,4-dioxane removal with low energy consumption. At 120 min, the minimum energy consumption in the PSPC process was less than 20% of that in the conventional electro-Fenton process (7.8 ± 0.1 vs. 47.0 ± 0.6 kWh/kg). The PSPC should be a promising alternative for enhancing 1,4-dioxane removal in the real wastewater treatment. HIGHLIGHTS
1,4-dioxiane was efficiently removed in the PSPC process.;
Residual H2O2 and Fe2+ were minimized by optimizing pulsed switching circuits.;
The energy consumption in the PSPC reduced to 20% of that in the EF.; |
| first_indexed | 2024-12-20T02:38:23Z |
| format | Article |
| id | doaj.art-9e215aab11d34ecb84bd174adb1f0935 |
| institution | Directory Open Access Journal |
| issn | 2709-6092 2709-6106 |
| language | English |
| last_indexed | 2024-12-20T02:38:23Z |
| publishDate | 2021-06-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Reuse |
| spelling | doaj.art-9e215aab11d34ecb84bd174adb1f09352022-12-21T19:56:23ZengIWA PublishingWater Reuse2709-60922709-61062021-06-0111226827810.2166/wrd.2021.0920921,4-dioxane degradation using a pulsed switching peroxi-coagulation processYaobin Lu0Hualei Shi1Jialiang Yao2Guangli Liu3Haiping Luo4Renduo Zhang5 Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China The Affiliated High School of South China Normal University, Guangzhou 510630, China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China Widely used in chemical product manufacture, 1,4-dioxane is one of the emerging contaminants, and it poses great risk to human health and the ecosystem. The aim of this study was to degrade 1,4-dioxiane using a pulsed switching peroxi-coagulation (PSPC) process. The electrosynthesis of H2O2 on cathode and Fe2+ production on iron sacrifice anode were optimized to enhance the 1,4-dioxane degradation. Under current densities of 5 mA/cm2 (H2O2) and 1 mA/cm2 (Fe2+), 95.3 ± 2.2% of 200 mg/L 1,4-dioxane was removed at the end of 120 min operation with the optimal pulsed switching frequency of 1.43 Hz and pH of 5.0. The low residual H2O2 and Fe2+ concentrations were attributed to the high pulsed switching frequency in the PSPC process, resulting in effectively inhibiting the side reaction during the ·OH production and improving the 1,4-dioxane removal with low energy consumption. At 120 min, the minimum energy consumption in the PSPC process was less than 20% of that in the conventional electro-Fenton process (7.8 ± 0.1 vs. 47.0 ± 0.6 kWh/kg). The PSPC should be a promising alternative for enhancing 1,4-dioxane removal in the real wastewater treatment. HIGHLIGHTS 1,4-dioxiane was efficiently removed in the PSPC process.; Residual H2O2 and Fe2+ were minimized by optimizing pulsed switching circuits.; The energy consumption in the PSPC reduced to 20% of that in the EF.;http://jwrd.iwaponline.com/content/11/2/2681,4-dioxane degradationelectro-fentonpulsed switching circuitsacrifice iron anode |
| spellingShingle | Yaobin Lu Hualei Shi Jialiang Yao Guangli Liu Haiping Luo Renduo Zhang 1,4-dioxane degradation using a pulsed switching peroxi-coagulation process Water Reuse 1,4-dioxane degradation electro-fenton pulsed switching circuit sacrifice iron anode |
| title | 1,4-dioxane degradation using a pulsed switching peroxi-coagulation process |
| title_full | 1,4-dioxane degradation using a pulsed switching peroxi-coagulation process |
| title_fullStr | 1,4-dioxane degradation using a pulsed switching peroxi-coagulation process |
| title_full_unstemmed | 1,4-dioxane degradation using a pulsed switching peroxi-coagulation process |
| title_short | 1,4-dioxane degradation using a pulsed switching peroxi-coagulation process |
| title_sort | 1 4 dioxane degradation using a pulsed switching peroxi coagulation process |
| topic | 1,4-dioxane degradation electro-fenton pulsed switching circuit sacrifice iron anode |
| url | http://jwrd.iwaponline.com/content/11/2/268 |
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