Poly(vinyl alcohol)(PVA)/cellulose acetate(CA) composite membranes were
preparedfor metal ions removal from water.
The top layer was modified by polyethylene glycol and glycerin,then irradiated with
32[J/cm2] photo dose to improve adequate selecti
vity for metal ions separation.
The flux of water increased with increasingoperating pressure, and the maximum
value of flux was 200[L/m2.h] at 4[bar] for the membrane(PVA68/PEG17/G15), but this
membrane tear after applying pressure above 4[bar], while composite and CA membranes
served for long time at pressures higher than (4[bar]).
The rejection of ions decreased as the feed water pressure increased. The maximum
percent retention of ions was found to be 97% for Pb+2, 96% for Cu+2, and 95% for Co+2at
pressure of 2[bar] in composite membrane.
