期刊
ACS Sustainable Chemistry & Engineering
标题
Magnet-Responsive Silica Microrods as Solid Stabilizer and Adsorbent for Simultaneous Removal of Coexisting Contaminants in Water
作者
Dafan Chen, Yiming Li, Mutai Bao, Yajie Hou, Jiafeng Jin, Zichao Yin, Zhining Wang
摘要
Because of the differences in physicochemical properties, it is of a great challenge to achieve efficient and simultaneous removal of various pollutants from water only based on one material. In this study, magnetic silica microrods (R-Fe3O4@SiO2) were successfully fabricated and used for the removal of coexisting pollutants (oil, heavy metals, soluble organic dyes) in water. R-Fe3O4@SiO2 could act as an effective solid stabilizer to disperse oil contaminants into droplets, due to its high adsorption energy at the oil–water interface. The encapsulated oil by R-Fe3O4@SiO2 could be effectively separated from water by applying a magnetic field. Simultaneously, R-Fe3O4@SiO2 could adsorb soluble cationic dyes and heavy metals through electrostatic interactions. The maximal removal capacity of R-Fe3O4@SiO2 for various pollutants in water was compared with that of some of the previously reported materials, and they showed a satisfied result. Additionally, the removal capacity of R-Fe3O4@SiO2particles for multiple coexisting contaminants in water was evaluated. It is worthy to note that R-Fe3O4@SiO2 still showed a great removal capacity for multiple coexisting pollutants even after five runs of a sorption–desorption cycle. These results revealed that this technically simple R-Fe3O4@SiO2 material is a feasible material for the removal of various coexisting pollutants in water, and thus it holds great prospects as a candidate for the one-step water purification in practical applications.
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