PVDF membrane with tea powder adhered for efficient separation of emulsified oil

被引:7
作者
Zhang, Junshuang [1 ]
Wu, Yue [1 ]
Xia, Mengsheng [2 ]
Yang, Qijiang [1 ]
Xu, Qinyao [2 ]
Feng, Wenwen [3 ]
机构
[1] Guangzhou Maritime Univ, Sch Marine Engn, 101 Hongshan Third Rd, Guangzhou 510725, Peoples R China
[2] Zhejiang Ocean Univ, Sch Ships & Maritime Transport, 1 Haida South Rd, Zhoushan City 316022, Peoples R China
[3] Guangdong Ind Polytech, Sch Light Chem Technol, 152 Xingang West Rd, Guangzhou City 510300, Peoples R China
关键词
Super Wetting Materials; Tea Powder; PVDF Membrane; Oil-in-water Emulsions; Separation; IN-WATER EMULSIONS; COATED MEMBRANES; PERFORMANCE; POLLUTION;
D O I
10.1007/s11814-023-1541-9
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Conventional oily wastewater treatment can remove slick oil and dispersed oil well, but it is difficult for it to remove emulsified oil. Nonetheless, the development of super wetting materials provides a key role in treating the emulsified oil, but there are some problems, such as expensive raw materials, complicated processes, as well as secondary pollution. In order to treat these problems, a brand-new oil/water separation membrane (TEA/PVDF membrane) was developed by combining the viscosity of sodium alginate (SA) and the filter tea powder (TEA) onto the surface of the polyvinylidene fluoride (PVDF) membrane by a vacuum pump. Furthermore, the underwater oleophobic angle reached 135o. Moreover, the oil-water separation experiments of oil-in-water emulsion utilizing TEA/PVDF membrane demonstrated excellent separation efficiency (99.6%) and good flux (254 L m-2 h-1 bar-1). Notably, upon ten cycles, the oil removal rate was still as high as 99.2%. Moreover, the TEA/PVDF membrane was able to separate oil-in-water emulsions in environments with strong acids, strong bases, and high salt concentrations, with a separation efficiency of over 95.9%. Such a novel oil/water separation membrane is economic, environmentally protective, and simple production process, which exhibits overwhelming potential in practical life for treating oily wastewater.
引用
收藏
页码:2376 / 2383
页数:8
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