KMS Chongqing Institute of Green and Intelligent Technology, CAS
| A Trickle Bed Electrochemical Reactor for Generation of Hydrogen Peroxide and Degradation of an Azo Dye in Water | |
Lei, Yangming1,2; Liu, Hong1  ; Jiang, Chengchun3; Shen, Zhemin2; Wang, Wenhua2
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| 2015 | |
| 摘要 | A trickle bed electrochemical reactor was used to generate hydrogen peroxide in dilute electrolyte and then degrade an azo dye, i.e. reactive brilliant red X-3B in water by electro-Fenton process. The trickle bed reactor was composed of carbon black-polytetrafluoroethylene coated graphite chips. During the preparation of coated graphite chips, coating times and surfactant dosage were optimized to improve electro-generation of H2O2. In addition, the optimal electrolysis conditions for H2O2 electro-generation were obtained as follows, cell voltage of 4.5 V, air flow rate of 0.1 m(3)/h, electrolyte flow rate of 15 mL/min, and initial pH of 3. Under the given conditions, H2O2 concentration, production rate and current efficiency were 5.01 mmol/L, 134 mu mol/(h.cm(2)) and 63.7%, respectively, after 1 h of electrolysis. With addition of 0.1 mmol/L Fe2+, 123 mg/L X-3B was completely removed from water after 30 min of electro-Fenton treatment, whereas total organic carbon dropped slowly from 17.8 mg/L to 2.28 mg/L (87% mineralization) after 3 h. The trickle bed reactor was sufficient to treat low-strength wastewater or be used in tandem with other treatment units. |
| 关键词 | Trickle bed reactor Hydrogen peroxide Electro-Fenton Reactive brilliant red X-3B Wastewater treatment |
| 发表期刊 | JOURNAL OF ADVANCED OXIDATION TECHNOLOGIES
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| ISSN | 1203-8407 |
| 卷号 | 18期号:1页码:47-56 |
| 通讯作者 | Liu, H (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China. |
| 收录类别 | SCI |
| WOS记录号 | WOS:000352266400006 |
| 语种 | 英语 |
