Self-Driven One-Step Oil Removal from Oil Spill on Water via Selective-Wettability Steel Mesh

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• 作者：Jinlong Song ; Shuai Huang ; Yao Lu ; Xiangwei Bu ; Joseph E. Mates ; Aritra Ghosh ; Ranjan Ganguly ; Claire J. Carmalt ; Ivan P. Parkin ; Wenji Xu ; Constantine M. Megaridis
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：November 26, 2014
• 年：2014
• 卷：6
• 期：22
• 页码：19858-19865
• 全文大小：455K
• ISSN：1944-8252

文摘

Marine oil spills seriously endanger sea ecosystems and coastal environments, resulting in a loss of energy resources. Environmental and economic demands emphasize the need for new methods of effectively separating oil鈥搘ater mixtures, while collecting oil content at the same time. A new surface-tension-driven, gravity-assisted, one-step, oil鈥搘ater separation method is presented for sustained filtration and collection of oil from a floating spill. A benchtop prototype oil collection device uses selective-wettability (superhydrophobic and superoleophilic) stainless steel mesh that attracts the floating oil, simultaneously separating it from water and collecting it in a container, requiring no preseparation pumping or pouring. The collection efficiencies for oils with wide ranging kinematic viscosities (0.32鈥?0.4 cSt at 40 掳C) are above 94%, including motor oil and heavy mineral oil. The prototype device showed high stability and functionality over repeated use, and can be easily scaled for efficient cleanup of large oil spills on seawater. In addition, a brief consolidation of separation requirements for oil鈥搘ater mixtures of various oil densities is presented to demonstrate the versatility of the material system developed herein.

Keywords:

oil/water separation; oil spill cleanup; self-driven separation; wettability; stainless steel mesh