Assessment of the colour removal capability of low-pressure dynamically formed membranes:

AbstractExperimental work undertaken to explore the aptness of low-pressure dynamically formed membranes (DFMs) for colour removal from dyewastes is reported. Hydrous zirconium oxide-polyacrylic acid (Zr-PAA) membranes have been dynamically formed on a composite, ceramic-metal mesh microfiltration (MF) membrane at pressures and cross-flow velocities below 1.5 MPa and 3 m/s respectively. Resulting membranes were assessed on feed steams containing inorganic salts and commercial direct, acid and basic dyes. Membrane performance, expressed as permeate flux and solute rejection, was quantified under various feedwater conditions of salt and dye concentration, dye type and feed temperature.