Surface-engineered graphene-based multi-level filter materials for one-step separation of complex oil-in-water emulsions

被引:3
|
作者
Han, Longxiang [1 ]
Bi, Hengchang [2 ,3 ]
Huang, Haizhou [1 ]
Ye, Mao [1 ]
Sun, Jiawei [4 ]
Sun, Litao [1 ]
机构
[1] Southeast Univ, Minist Educ, SEU FEI NanoPico Ctr, Key Lab MEMS, Nanjing 210096, Peoples R China
[2] East China Normal Univ, Sch Commun & Elect Engn, Shanghai Key Lab Multidimens Informat Proc, 500 Dongchuan Rd, Shanghai 200241, Peoples R China
[3] Chongqing Inst East China Normal Univ, Chongqing Key Lab Precis Opt, Chongqing 401120, Peoples R China
[4] Suzhou Univ Sci & Technol, Coll Elect & Informat Engn, Suzhou 215009, Peoples R China
基金
美国国家科学基金会;
关键词
One-step separation; Multi-level structure; Functionalized graphene; Surfactant; Oil-in-water emulsion; OIL/WATER SEPARATION; HIGHLY EFFICIENT; SPONGE; MEMBRANE; DEMULSIFICATION; ADSORPTION; COMPOSITE; CLEANUP;
D O I
10.1016/j.seppur.2024.126616
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Global daily oil consumption reaches nearly 100 million barrels, a figure which consequently leads to the generation of substantial volumes of oily wastewater during the processes of oil production and transportation. Existing advanced materials exhibit remarkable properties for emulsions stabilized by specific surfactants. However, these materials face limitations in practical application due to the intricate composition of surfactants present in real -world oily wastewater. In this paper, we aim to tackle this issue by presenting a solution that involves the utilization of surface -engineered graphene-based multi -level filter materials (GMFMs). These specially prepared GMFMs incorporate positively charged, negatively charged, and uncharged graphene sheets, which synergistically combine to form a porous structure with unique wettability. This innovative design allows the filter material to exhibit exceptional separation capabilities for complex emulsions. The surface -engineered GMFMs exhibited exceptional efficiency in the separation of mixed surfactant -stabilized emulsions and industrial wastewater. Operating at a high throughput of approximately 5000 L m- 2 h-1, these GMFMs achieved an impressive oil removal efficiency of 99.8 % or higher after just one-step separation. The combined efficiency, reusability, and broad applicability of GMFMs facilitate efficient separation of oil -in -water emulsions on a large scale, promising a sustainable solution to the pressing issue of oily wastewater treatment.
引用
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页数:11
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