Demulsification performance and mechanism of oil droplets by electrocoagulation: Role of surfactant
文献类型：期刊论文
| 作者 | Wang, Liang ; Zhang, Ben; Zhao, Bin; Yang, Saiguo; Wu, Kun; Sun, Jingqiu; Hu, Chengzhi
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| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
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| 出版日期 | 2022-08 |
| 卷号 | 118期号:0页码:171-180 |
| 关键词 | WASTE-WATER ALUMINUM ELECTRODES CURRENT-DENSITY REMOVAL TRANSFORMATION AGGREGATION BEHAVIOR LAYERS |
| ISSN号 | 1001-0742 |
| 英文摘要 | Surfactants are widely used to improve the solubility of oil in water in petrochemical, making it more difficult to remove oil-water emulsions during the water treatment process. Electrocoagulation (EC) is an appropriate method for treating oily wastewater and destabilizing emulsions. However, the demulsification mechanism of oil-water droplets emulsified by surfactants with different charges have not been investigated systematically. The demulsification performance of electrocoagulation on emulsions wastewater containing cationic, non-ionic, and anionic surfactants was studied. The results showed that the removal rate of total organic carbon (TOC) in oily wastewater with anionic surfactant by EC reached 92.98% +/- 0.40% at a current density of 1 mA/cm(2), while that of the non-ionic surfactant was 84.88% +/- 0.63%. The characterization of flocs showed that EC has the highest coagulation and demulsification of oil droplets with a negative charge on the surface (-70.50 +/- 10.25 mV), which indicated that the charge neutralization of oil droplets was beneficial for the destabilization of the formed oily flocs. However, when the zeta potential of the oil droplets reached 75.50 +/- 1.25 my, the TOC removal efficiency was only 11.80% +/- 1.43%. The TOC removal could achieve 33.23% +/- 3.21% when the current density improved from 1 mA/cm(2) to 10 mA/cm(2). The enhanced removal was due to the sweep coagulation rather than charge neutralization. This study provides a fundamental basis for the electrochemical treatment of oily wastewater. (C) 2022 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47684]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 通讯作者 | Sun, Jingqiu |
| 作者单位 | 1.Tiangong Univ, Sch Environm Sci & Engn, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 3.Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Peoples R China 4.Suzhou Univ Sci & Technol, Jiangsu Collaborat Innovat Ctr Technol & Mat Wate, Suzhou 215009, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Liang,Zhang, Ben,Zhao, Bin,et al. Demulsification performance and mechanism of oil droplets by electrocoagulation: Role of surfactant[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2022,118(0):171-180. |
| APA | Wang, Liang.,Zhang, Ben.,Zhao, Bin.,Yang, Saiguo.,Wu, Kun.,...&Hu, Chengzhi.(2022).Demulsification performance and mechanism of oil droplets by electrocoagulation: Role of surfactant.JOURNAL OF ENVIRONMENTAL SCIENCES,118(0),171-180. |
| MLA | Wang, Liang,et al."Demulsification performance and mechanism of oil droplets by electrocoagulation: Role of surfactant".JOURNAL OF ENVIRONMENTAL SCIENCES 118.0(2022):171-180. |
入库方式： OAI收割
来源：生态环境研究中心
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