GUO Zihan 1, WANG Yongqing 1, HU Xuebing 1, BAI Huaqi 1, XU Zeyue 2
(1. University Key Laboratory of Inorganic Membrane in Jiangxi Province, Jingdezhen Ceramic Institute, Jingdezhen 333001, Jiangxi, China; 2. Jiangsu Province Ceramics Research Institute Co., Ltd., Yixing 214221, Jiangsu, China)
Abstract: Nowadays, membrane separation technology has been attracted wide attention as a novel method for oily wastewater treatment. At this stage, how to further improve the membrane separation performance, especially the oil-water separation performance, has become a key technical bottleneck that needs to be solved. In our present work, graphene oxide was prepared by using a modified Hummers method. The graphene oxide was used to modify alumina ceramic membrane by using vacuum filtration. Through heat treatment of the modified membrane at different temperatures, combined with UV spectrophotometer, SEM and other characterization techniques, the influence of heat treatment temperature on oil-water separation performance of the modified ceramic membrane was studied. It was demonstrated that within a certain temperature range, as the heat treatment temperature was gradually increased, the hydrophilic properties of the graphene oxide modified ceramic membrane were varied. Accordingly, the oil-water separation performance of the modified membrane was gradually improved. When the heat treatment temperature was 300 °C, the water flux of the modified membrane was 19.48% and the oil rejection rate was as high as 90.96%.
Key words: graphene oxide; modified; ceramic membrane; oil/water separation; heat treatment