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Abstract
PU and Cpsf Blend UF Membranes. II. Pore Statistics, MWCO and Application Studies
Duraikkannu Shanthana Lakshmi*, Latha C. S and Mohan D
The performance of membranes for a specific application can be determined with the help of structural properties such as Molecular Weight Cutoff (MWCO), morphology and pore statistics. Heavy metal ions from aqueous streams can be separated with the help of ultrafiltration membranes. MWCOs and pore statistics of Polyurethane (PU) and Carboxylated Polysulfone (Cpsf) blend ultrafiltration in the presence and absence of the various composition of the additive poly (ethylene glycol) 600 were studied with the help of dextran of different molecular weights ranging from 19 kDa to 150 kDa. The derived pore size, porosity and number of pores have a remarkable relationship with the MWCO, morphology and the flux performance of the membranes. Certain toxic divalent heavy metal ions such as copper, cadmium, nickel and zinc were subjected to rejection by the blend membranes by complexing them a polymeric ligand, Poly (Ethyleneimine) (PEI). The effect of the polymer blend compositions and additive concentrations on the rejection and permeate flux of metal ions are discussed.
Published Date: 2024-08-12; Received Date: 2020-04-30