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Rejections of salts at different pH values. Membrane used: PVDF (Nanostone PV200) with OmpF layer (-PAA-PAH-OmpF-PSS) and without OmpF layer (-PAA-PAH-PSS). Membrane used: PVDF (Nanostone PV200) with a layer-by-layer functionalization. Some error bars are inside the symbols or are negligible.
