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X-ray diffraction patterns of nanofiltration membranes prepared through a phase inversion method to a nominal wt.% loadings of 0, 0.1, 0.3, 0.5, 0.75, and 1.0 using ZSM-22: (a) C60-ZSM-22/PES and (b) F60-ZSM-22/PES with zeolite as additives.
