Degradation of organic pollutants by a Co_3O_4 -graphite composite electrode in an electro-Fenton-like system
文献类型：CNKI期刊论文
| 作者 | LIU Shuan; GU Yan; WANG ShuLian; ZHANG Yu ; FANG YanFen; JOHNSON David M; HUANG YingPing
|
| 发表日期 | 2013-07-05 |
| 出处 | Chinese Science Bulletin
 |
| 关键词 | Co3O4-graphite electrode, electro-Fenton-like system, electro-generation of hydroxyl radicals, electro-catalytic degradation of POPs |
| 英文摘要 | A novel composite electrode was constructed by pressing together Co3O4 and graphite and it was used as the cathode in an electro-Fenton-like (EFL) system. The poor electron transport characteristic of Co3O4 was overcome by incorporating graphite. In situ electro-catalytic generation of hydroxyl radicals (·OH) occurred at high current efficiencies from pH 2-10, extending the traditional Fenton reaction pH range. Cyclic voltammetry and AC impedance spectrometry were used to characterize the composite electrode. The ability of the EFL system to degrade organic compounds was investigated using sulforhodamine B (SRB) and 2,4-dichlorophenol (2,4-DCP) as probes. Decoloration of SRB (1.0×10-5 mol/L) was complete (100%) in 150 min and SRB was effectively degraded from pH 2-10. The decomposition of SRB was studied using Fourier transform infrared spectroscopy (FT-IR) and total organic carbon (TOC) analysis and results indicated that the final degradation products were carbon dioxide, carboxylic acids and amines. The EFL system also decomposed 2,4-DCP and the degradation was 98.6% in 240 min. Electro-catalytic degradation of SRB occurs by a ·OH mechanism. After 5 times reused, the degradation rate of SRB did not significantly slow down. The electrode shows excellent potential for use in advanced oxidation processes (AOPs) used to treat persistent organic pollutants (POPs) in wastewater. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | supported by the National Natural Science Foundation of China (21177072, 21207079) ; the Educational Commission for Distinguished Group of Hubei Province, China (T200703) ; the Natural Science Foundation for Innovation Group of Hubei Province, China(2009CDA020) |
| 卷 | v.58期:19页:76-82 |
| 语种 | 英文; |
| 分类号 | X5;O643.32 |
| ISSN号 | 1001-6538 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/190832]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.EngineeringResearchCenterofEco-environmentinThreeGorgesReservoirRegion,MinistryofEducation,ChinaThreeGorgesUniversity 2.InstituteofOceanology,ChineseAcademyofSciences 3.SchoolofNaturalScience&Mathematics,FerrumCollege |
| 推荐引用方式 GB/T 7714 | LIU Shuan,GU Yan,WANG ShuLian,et al. Degradation of organic pollutants by a Co_3O_4 -graphite composite electrode in an electro-Fenton-like system. 2013. |
入库方式： OAI收割
来源：海洋研究所
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