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Open AccessArticle

Recovery of Filtered Graphene Oxide Residue Using Elastic Gel Packed in a Column by Cross Flow

Department of Applied Chemistry, Saga University, Saga 840-8502, Japan
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Author to whom correspondence should be addressed.
Processes 2018, 6(5), 43; https://doi.org/10.3390/pr6050043
Received: 28 March 2018 / Revised: 20 April 2018 / Accepted: 23 April 2018 / Published: 25 April 2018
(This article belongs to the Special Issue Membrane Materials, Performance and Processes)
To recover the filtered residues on a gel layer in a column, the method using the elasticity of the gel layer and flowing water in a cross-flow manner is proposed. Polymerized spherical gel (40 μm) was packed in a column to a set height of 0.7 cm. The suspensions of graphene oxide at various sizes and shapes were injected on the top of the gel layer and then water was flowed at a flow rate of 1000 mL·h−1 until 0.10 MPa. By releasing the applied pressure, the elastic gel layer rose up, and the filtered graphene oxide also rose above the layer. This rise of the gel layer is due to the difference of pressure between the gel layer, including the filtered graphene oxide, and the open bottom of the column, using the flow of water. The cross flow of water through the column carried away the larger-sized filtered graphene oxide floating above the gel layer. The elasticity of the gel layer and cross flow through the column has the potential to recover the filtered particles. View Full-Text
Keywords: graphene oxide; elastic gel; cross flow; recovery; separation graphene oxide; elastic gel; cross flow; recovery; separation
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MDPI and ACS Style

Takaoka, Y.; Miyoshi, M.; Sakaguchi, K.; Morisada, S.; Ohto, K.; Kawakita, H. Recovery of Filtered Graphene Oxide Residue Using Elastic Gel Packed in a Column by Cross Flow. Processes 2018, 6, 43.

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