Smart Janus membrane for on-demand separation of oil, bacteria, dye, and metal ions from complex wastewater

Hu，Jietao1; Gui，Lishuang1; Zhu，Mingning2; Liu，Kuiliang3; Chen，Ya1; Wang，Xiaopan1; Lin，Jing1

2022-05-18

10.1016/j.ces.2022.117586

CHEMICAL ENGINEERING SCIENCE   影响因子和分区

0009-2509

1873-4405

Oil spills and oily wastewater discharged from industries and households have resulted in environmental and economic concerns. Therefore, emerging Janus membranes with anisotropic wettability have attracted significant attention as next-generation oil/water separation membranes owing to their specific, on-demand separation ability. However, the one-step separation of complex wastewater has not yet been achieved. Herein, a pH-responsive siloxane modified polystyrene microsphere/zinc oxide/carbon nanotube/polyvinylidene fluoride (S/PS/ZnO/CNTs/PVDF) membrane was rationally designed with Janus surfaces for providing hydrophilicity/underwater lipophobicity and lipophilicity/underoil hydrophobicity functionality. This study demonstrates that the underlying mechanism of on-demand separation of water-in-oil and oil-in-water emulsion is related to wettability, adhesive forces, and intrusion pressure. The proposed Janus membrane can achieve one-step separation of complex wastewater comprising oil, bacteria, organic dye, and metal ions. The effective removal of dyes is due to synergistic effects of electrostatic adsorption and photodegradation. This facile strategy for fabricating smart Janus separation membranes has application potential in on-demand oil/water separation and practical complex wastewater separation.

Bacteria Complex wastewater Dye Janus membrane Oil/water separations

SCI ; EI

英语

通讯

National Natural Science Foundation of China[22078077,21676060] ; Natural Science Foundation of Guangdong Province, China[2021A1515010078] ; Key Research Projects of Guangzhou Univer-sity[YK2020014] ; Scientific and Technological Plan of Guangdong Province, China[2019B090905007]

Engineering

Engineering, Chemical

WOS:000779511100004

PERGAMON-ELSEVIER SCIENCE LTD

20221211816625

Adhesives ; Bacteria ; Emulsions ; Membranes ; Metal ions ; Metals ; Oil spills ; Separation ; Wetting

Water Pollution Sources:453.1 ; Metallurgy:531.1 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Materials Science:951

CHEMISTRY

2-s2.0-85126533474

Scopus

1.School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou,510006,China
2.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
3.Key Laboratory for Water Quality and Conservation of the Pearl River Delta,Ministry of Education,Guangzhou,510006,China

Hu，Jietao,Gui，Lishuang,Zhu，Mingning,et al. Smart Janus membrane for on-demand separation of oil, bacteria, dye, and metal ions from complex wastewater[J]. CHEMICAL ENGINEERING SCIENCE,2022,253.

Hu，Jietao.,Gui，Lishuang.,Zhu，Mingning.,Liu，Kuiliang.,Chen，Ya.,...&Lin，Jing.(2022).Smart Janus membrane for on-demand separation of oil, bacteria, dye, and metal ions from complex wastewater.CHEMICAL ENGINEERING SCIENCE,253.

Hu，Jietao,et al."Smart Janus membrane for on-demand separation of oil, bacteria, dye, and metal ions from complex wastewater".CHEMICAL ENGINEERING SCIENCE 253(2022).