3D inner-outer asymmetric sponge for enormous-volume emulsion wastewater treatment based on a new“demulsification-transport”mechanism  

作　　者：Ruixiang Qu Shuaiheng Zhao Na Liu Xiangyu Li Huajun Zhai Ya'nan Liu Yen Wei Lin Feng 

机构地区：[1]Department of Chemistry,Tsinghua University,Beijing,100084,China [2]Intelligent Perception Research Institute,Zhejiang Lab,Hangzhou,310005,China

出　　处：《Green Energy & Environment》2023年第5期1398-1408,共11页绿色能源与环境（英文版）

基　　金：The authors are grateful for financial support from the National Natural Science Foundation of China(52173111,21788102).

摘　　要：Although oily wastewater treatment realized by superwetting materials has attracted heightened attention in recent years,how to treat enormous-volume emulsion wastewater is still a tough problem,which is ascribed to the emulsion accumulation.Herein,to address this problem,a material is presented by subtly integrating chemical demulsification and 3D inner-outer asymmetric wettability to a sponge substrate,and thus wettability gradient-driven oil directional transport for achieving unprecedented enormous-volume emulsion wastewater treatment is realized based on a“demulsification-transport”mechanism.The maximum treatment volume realized by the sponge is as large as 3 L(2.08×10^(4) L per cubic meter of the sponge)in one cycle,which is about 100 times of the reported materials.Besides,owing to the large pore size of the sponge,9000 L m^(2)h^(-1)(LMH)separation flux and 99.5%separation efficiency are realized simultaneously,which overcomes the trade-off dilemma.Such a 3D inner-outer asymmetric sponge displaying unprecedented advantage in the treatment volume can promote the development of the oily wastewater treatment field,as well as expand the application prospects of superwetting materials,especially in continuous water treatment.

关 键 词：Enormous-volume emulsion treatment Inner-outer asymmetric wettability Demulsification-transport mechanism High separation efficiency 

分 类 号：X703[环境科学与工程—环境工程]