Iono-molecular Separation with Composite Membranes V. Nitro-phenol separation on n-alkyl alcohols supported liquid membranes

Ion Spiridon Din, Anca Maria Cimbru, Hussam Nadum Abdalraheem Al Ani, Ion Marius Nafliu, Szidonia Katalin Tanczos, Gheorghe Nechifor
2018 Revista de Chimie  
In this work are ongoing recent related studies on the separation of nitrophenols by composite membranes using this time an HFCLM membrane based on n-lower alkyl alcohols (C6, C8 si C10) on a well-characterized tubular polypropylene support . The results of nitrophenol separation, at a concentration of 5 mg / L in the source phase of pH 4.8, indicate the following optimal parameters of hydrodynamic regime, solvent and pH: source phase flow of 4.0 L / min, receiver phase rate 0.3 L / min;
more » ... ol, membrane solvent; the pH of the receiving phase that ensures maximum separation efficiency between 10 and 11; pH that ensures selective separation of m- and p-nitrophenols from m-nitrophenol between 8 and 10.The efficiency of nitrophenol separation through polypropylene capillary polymeric n-alcohol composite membranes reaches more than 90% at established working conditions, but operation below pH 12 will be considered in order not to cause membrane instability on the support.
doi:10.37358/rc.18.5.6266 fatcat:ksb2hej5lbdvnk26227h2kmfta