Scale Design of Dual-Layer Polyphenylsulfone/Sulfonated Polyphenylsulfone Hollow Fiber Membranes for Nanofiltration.

This study focuses on the synthesis and characterization of dual-layer sulfonated polyphenylenesulfone (SPPSu) nanocomposite hollow fiber nanofiltration membranes incorporating titanium dioxide (TiO) nanoparticles through the phase inversion technique. Advanced tools and methods were employed to systematically evaluate the properties and performance of the newly developed membranes. The investigation primarily centered on the impact of TiO addition in the SPPSu inner layer on pure water permeability and salt rejection.

Synthesis and DNA-binding studies of two ruthenium(II) complexes of an intercalating ligand.

Two new ruthenium(II) complexes [Ru(bpy)(2)(HBT)](2+) (1) and [Ru(phen)(2)(HBT)](2+) (2) (bpy=2,2'-bipyridine; phen=1,10-phenanthroline; HBT=11H, 13H-4, 5,9,10,12,14-hexaaza-benzo [b] triphenylene) have been synthesized and characterized by elemental analysis, mass spectra, (1)H NMR and cyclic voltammetry. The DNA binding property of the two complexes has been investigated employing absorption spectroscopy, fluorescence spectroscopy and viscosity measurements. Both complexes 1 and 2 have been found to prefer intercalative binding to DNA.

Toxic metal ion separation by cellulose acetate/sulfonated poly(ether imide) blend membranes: effect of polymer composition and additive.

Toxic heavy metal ion removal from industrial effluents are gaining increased visibility owing to environmental concern and saving precious materials. In this work, an attempt has been made to remove the valuable metal ions using modified ultrafiltration (UF) blend membranes based on cellulose acetate (CA) and sulfonated poly(ether imide) (SPEI) were prepared in the presence and absence of additive, poly(ethylene glycol) 600 (PEG600) in various compositions. Prepared membranes were characterized in terms of pure water flux (PWF), water content and membrane hydraulic resistance.