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Ruixi Bai,Yang Zhang,Zhigang Zhao,Qiuxia Liao,Peng Chen,Panpan Zhao,Wanghuan Guo,Fan Yang,Laichao Li 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.59 No.-
Rapid and highly selective magnetic core–shell adsorbents for Pb2+ removal from simulated wastewater of rare-earth industry were prepared by synthesizing chitosan-coated Fe3O4 (Fe@CS) beads and following chemical-grafting steps for the diglycolamic-acid group (DGA). The adsorbents had a highly selective ability for Pb2+ toward other metal ions, which attributed to the superior infinity between the DGA and Pb2+. The maximum adsorption capacity of Pb2+ was 70.57 mg/g. The R2 of the pseudo-second order kinetics was 0.99857, which indicated the adsorption process was controlled by chemical reactions. Moreover, diglycolamic-acid functionalized Fe@CS (Fe@CS-DGA) beads separated from water within 9 s under magnetic fields.
Panpan Zhao,Fan Yang,Zhigang Zhao,Qiuxiao Liao,Yang Zhang,Peng Chen,Wanghuan Guo,Ruixi Bai 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.54 No.-
For the first time, our group has developed a novel, high-flux strategy for shape-controlled synthesis of rare earth nano-materials (CePO4) using ionic liquid(IL)-driven supported liquid membrane (HVHP, DUPAPORE1) system. The system contains three phases including a supply phase of rare earth ions, a feed phase of phosphates, and ionic liquid-driven supporting liquid membrane phase. The imidazolium IL-driven supported liquid membrane is promising for nano-synthetic reaction of CePO4. The anion types of immersed imidazolium IL have a critical role in the formation rate of CePO4 nano-materials. Moreover, the adding SO4 2 anion or adjustment of pH in supply phase containing Ce(III) ions could control effectively the morphology of the CePO4 nano-materials. The result can be regarded as a good example, the IL:[C4mim][Tf2N] driven support liquid membrane systems can be used to prepare nano-wire and nano-sphere structures of CePO4 with high efficiency and flux. Besides, the IL-driven supported liquid membrane can be cycled many times by using the back flush activation method.