Adsorption and regeneration of expanded graphite modified by CTAB-KBr/H3PO4 for marine oil pollution

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	Adsorption and regeneration of expanded graphite modified by CTAB-KBr/H3PO4 for marine oil pollution
	Yao, Ruihua; Jiao, Wentao; Xu, Congbin; Jiao, Chunlei; Lin, Aijun
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/311016/40451]
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	Yao, Ruihua,Jiao, Wentao,Xu, Congbin,et al. Adsorption and regeneration of expanded graphite modified by CTAB-KBr/H3PO4 for marine oil pollution[J]. ENVIRONMENTAL POLLUTION,2018,233:194-200.
APA	Yao, Ruihua,Jiao, Wentao,Xu, Congbin,Jiao, Chunlei,&Lin, Aijun.(2018).Adsorption and regeneration of expanded graphite modified by CTAB-KBr/H3PO4 for marine oil pollution.ENVIRONMENTAL POLLUTION,233,194-200.
MLA	Yao, Ruihua,et al."Adsorption and regeneration of expanded graphite modified by CTAB-KBr/H3PO4 for marine oil pollution".ENVIRONMENTAL POLLUTION 233(2018):194-200.