Adsorption and regeneration of expanded graphite modified by CTAB-KBrH3PO4 for marine oil pollution | |
Xu, Congbin; Jiao, Chunlei; Yao, Ruihua; Lin, Aijun; Jiao, Wentao | |
刊名 | ENVIRONMENTAL POLLUTION |
2018-02-01 | |
卷号 | 233页码:194-200 |
关键词 | Modified expanded graphite Marine oil Regeneration Adsorption performance |
ISSN号 | 0269-7491 |
文献子类 | Article |
英文摘要 | The cleaning-up of viscous oil spilled in ocean is a global challenge, especially in Bohai, due to its slow current movement and poor self-purification capacity. Frequent oil-spill accidents not only cause severe and long-term damages to marine ecosystems, but also lead to a great loss of valuable resources. To eliminate the environmental pollution of oil spills, an efficient and environment-friendly oil-recovery approach is necessary. In this study,(1)expanded graphite (EG) modified by CTAB-KBr/H3PO4 was synthesized via composite intercalation agents of CTAB-KBr and natural flake graphite, followed by the activation of phosphoric acid at low temperature. The resultant modified expanded graphite (M-EG) obtained an interconnected and continuous open microstructure with lower polarity surface, more and larger pores, and increased surface hydrophobicity. Due to these characteristics, M-EG exhibited a superior adsorption capacity towards marine oil. The saturated adsorption capacities of M-EG were as large as 7.44 g/g for engine oil, 6.12 g/g for crude oil, 5.34 g/g for diesel oil and 4.10 g/g for gasoline oil in 120min, exceeding the capacity of pristine EG. Furthermore, M-EG maintained good removal efficiency under different adsorption conditions, such as temperature, oil types, and sodium salt concentration. In addition, oils sorbed into M-EG could be recovered either by a simple compression or filtration-drying treatment with a recovery ratio of 58-83%. However, filtration-drying treatment shows better performance in preserving microstructures of M-EG, which ensures the adsorbents can be recycled several times. High removal capability, fast adsorption efficiency, excellent stability and good recycling performance make M-EG an ideal candidate for treating marine oil pollution in practical application. (C) 2017 Elsevier Ltd. All rights reserved. |
内容类型 | 期刊论文 |
源URL | [http://ir.rcees.ac.cn/handle/311016/40708] |
专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
推荐引用方式 GB/T 7714 | Xu, Congbin,Jiao, Chunlei,Yao, Ruihua,et al. Adsorption and regeneration of expanded graphite modified by CTAB-KBrH3PO4 for marine oil pollution[J]. ENVIRONMENTAL POLLUTION,2018,233:194-200. |
APA | Xu, Congbin,Jiao, Chunlei,Yao, Ruihua,Lin, Aijun,&Jiao, Wentao.(2018).Adsorption and regeneration of expanded graphite modified by CTAB-KBrH3PO4 for marine oil pollution.ENVIRONMENTAL POLLUTION,233,194-200. |
MLA | Xu, Congbin,et al."Adsorption and regeneration of expanded graphite modified by CTAB-KBrH3PO4 for marine oil pollution".ENVIRONMENTAL POLLUTION 233(2018):194-200. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论