The rate of breakthrough oil-water separation difficulties was increased by 5 orders of magnitude

China Coatings Online reporter September 4 from Changsha University of Technology was informed that the university professor Jia Chuankun, Chongqing University Professor Sun Lidong, the Chinese Academy of Sciences Institute of Metals researcher Han Zhan co-led, jointly with the Singapore Science and Technology Bureau Institute of Chemistry and Engineering, etc. developed a penetration anode oxidation method, breaking through the traditional oil-water separation technology bottleneck.
The penetration anode oxidation method developed by
enables full coverage of ultra-hydro-water coatings within the three-dimensional microchannels of porous titanium (aperture 10 microns to 100 microns, thickness of 1 mm to 5 mm), increasing the penetration rate of water droplets in porous titanium by 5 orders of magnitude. Oil and water emulsion is filtered by microchannel to obtain a high purity water phase, its total organic carbon content is as low as 25 ppm below, oil and water separation efficiency of more than 99.9%

. The findings were published recently in the journal iScience, a sub-journal of Cell Press.
oil and water separation is a kind of green technology which separates oil and water mixture to realize waste oil recovery and sewage purification and discharge, and is widely used in food and beverage wastewater treatment, domestic sewage treatment, petrochemical industry and other fields. The porous titanium has a micron-grade 3D channel network, which has good chemical stability, resistance to acid and alkali corrosion and antioxidant, and is an ideal filtration material. However, porous titanium does not have ultra-immersive, oil and water emulsion has no separation effect; Due to its microchannel size, it is difficult to use traditional methods for ultra-immersion correction.
this end, the international research team developed the osmotic anode oxidation method, in the porous titanium three-dimensional microchannel preparation and regulation of ultra-hydrotherm nanotube coating, and finally achieve efficient separation of oil and water emulsion. According to the introduction, the results of this study break through the bottleneck of traditional oil and water separation technology, and have a wide range of applications. Hunan an enterprise has funded the team to carry out product development, the current small test prototype has been successfully developed, can achieve for catering, food processing and other industries oily sewage efficient separation.
。