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- W4210643669 abstract "Nanofiltration (NF) is widely used in separation of ions with different sizes and charges. However, thin-film composite NF membrane is hard to reach satisfied selectivity for monovalent/divalent salts separation. Herein, a novel host-guest NF membrane was designed and fabricated with cucurbituril-polyethyleneimine (CB-PEI) complex, which provided a “ring-like” supramolecular channel. The results indicated that CB-PEI/PSf membrane showed attractive separation performance for monovalent/divalent salts separation, purification and desalination of small molecule solutions. The as-prepared CB-PEI/PSf membrane exhibited superior pure water permeability up to 25.6 L·m −2 ·h −1 ·bar −1 , and salt rejections of 97.4%, 90.6%, 41.9% and 12.4% to MgSO 4 , Na 2 SO 4 , MgCl 2 and NaCl, respectively. The monovalent/divalent selectivelies for NaCl/MgSO 4 and NaCl/Na 2 SO 4 reached up to 30.0 and 8.9, respectively. Besides, the CB-PEI/PSf membrane exhibited very high separation factors for medicine/NaCl and dye/NaCl mixtures. Moreover, NF membrane processes were designed and operated for monovalent/divalent mixed salt separation by using CB-PEI/PSf membrane. The NaCl with mass fraction above 98% was successfully recovered after the single-stage membrane separation of NaCl/MgSO 4 mixture and the two-stage membrane separation of NaCl/Na 2 SO 4 mixture. Therefore, this novel host-guest NF membranes and process design provide a valuable basis for the industrial application of monovalent/divalent salts separation. • Host-guest CB-PEI complex with supramolecular channel for monovalent ion transport • CB-PEI/PSf membrane having superior monovalent/divalent salt separation property • CB-PEI/PSf membrane having excellent performance for dye or medicine desalination • The single-/two-stage NF processes for NaCl/MgSO 4 and NaCl/Na 2 SO 4 separation" @default.
- W4210643669 created "2022-02-08" @default.
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- W4210643669 date "2022-04-01" @default.
- W4210643669 modified "2023-10-05" @default.
- W4210643669 title "Host-guest nanofiltration membranes having amino-complexed cucurbituril supramolecular channel for monovalent/divalent salts separation" @default.
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- W4210643669 doi "https://doi.org/10.1016/j.desal.2022.115582" @default.
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