Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11003306 | Separation and Purification Technology | 2019 | 27 Pages |
Abstract
In this work, the interlamellar spacing of graphene-based membranes is expanded by grafting poly (ethylene imine) (PEI) on GO sheets. The novel graphene-based membranes present ultrahigh permeability without sacrificing the rejection for the filtration of dye wastewater. The original GO membrane (GOM) only has a pure water permeation flux (PWP) value of 27.0â¯L·mâ2·hâ1â¯barâ1. However, the novel graphene-based membranes prepared with the modified GO by PEI-600 and PEI-10000 (recorded as PGOM-600 and PGOM-10000) markedly increase to 208.1 and 450.2â¯L·mâ2·hâ1·barâ1 respectively. In the separation of dye wastewater, GOM, PGOM-600 and PGOM-10000 exhibit much higher rejections for direct red and methyl blue. However, the modified graphene-based membranes (PGOM-600 and PGOM-10000) present more than 7-20 times higher permeation flux than that of original GOM without sacrificing dye rejection. Thus, this work provides graphene-based membranes with ultrahigh permeation flux for dye removal from wastewater.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Jia-Jie Lu, Yi-Hang Gu, Yan Chen, Xi Yan, Ya-Jun Guo, Wan-Zhong Lang,