Research Article
Molecular Sieving Film Prepared by Vacuum Filtration for the Efficient Removal of Tetracycline Antibiotics from Pharmaceutical Wastewater
Figure 4
Photographs of the (a) nylon microporous filter and (b) PEI-modified nylon microporous filter. SEM images of (a1, a2) the surface and cross section of the nylon microporous filter and (b1, b2) the surface and cross section of the PEI-modified nylon microporous filter.