| 초록 |
In this work, a novel concept for the development of a polysulfone (PS)-based fiber as a high-performance acid-tolerant adsorbent for the recovery of platinum group metals (PGMs) in acidic solution was outlined. Polyethylenimine (PEI)-coated PS-Escherichia coli biomass composite fiber (PEI-PSBF) was prepared by spinning biomass-PS blends in water, coated with PEI and cross-linked with glutaraldehyde. The E. coli biomass on the fiber was executed as a functional group donor for binding PEI. PS fiber (PSF), PS-biomass composite fiber (PSBF), and PEI-modified PSF (PEI-PSF) were also prepared and compared with PEI-PSBF. The results of sorption experiments showed negligible sorption capacity of PSF and PEI-PSF. In contrast, the Pt(IV) uptake of PEI-PSBF was 6.6 times higher than that of PSBF. In addition, the maximum pH for preparation of PEI-PSBF was determined at around pH 9 and the reason for this is discussed. |
