Due to the increase in oil spill accidents and discharge of oily wastewater, it is urgent to develop functional materials to separate oil from oil/water mixtures. In this work, the kaolin-coated meshes were fabricated by a facile coating method to construct a micro-hierarchical surface and controllable pore size for the separation of various oil/water mixtures. The obtained meshes exhibits super-hydrophilicity, underwater super-oleophobicity with underwater oil contact angle > 150 degrees and outstanding oil/water separation efficiency above 99% and flux up to 190 L m(-2) h(-1) under gravity force. Moreover, the mesh still maintained high stability and good separation efficiency under corrosive condition and recycling. Furthermore, the mesh can also remove water from the water-in-oil emulsion. Results from this study are meaningful for the development of low-cost, and eco-friendly materials with high efficiency and mechanical robustness for oily wastewater treatment and open a new way for high-increment utilization of kaolin mineral.
Agro Food Industry Hi-Tech,2017年28(3):3000-3003 ISSN：1722-6996
[Liu Fen; Zhou Fenfen; Zhang Yaojuan] Hunan Agr Univ, Int Coll, Changsha 410128, Hunan, Peoples R China.
[Zhou Fenfen] Hunan Agr Univ, Int Coll, Changsha 410128, Hunan, Peoples R China.
College English graded teaching;International talent training goal;Multidimensional;Teaching mode
Since the establishment of the project in 2013, with the aim of cultivating international talents, the project team has been focusing on how to improve the quality of language teaching. Combining with the development of Chinese-foreign cooperation in running schools, in view of the difficulties and obstacles in the current language teaching of cultivating international talents, we make a deep research and exploration on college English graded teaching from the two aspects of theory and practice, to clarify the research and practice of college English graded teaching, putting forward a set of effective "2+3+4" multidimensional college English graded teaching mode, which is conducive to accelerating the pace of international talent training and English teaching reform.