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.
In this study we used electro spinning technology to obtain
nonwoven webs of Nano fibers of poly vinyl alcohol and Nano
particles of silver . we dissolve the polymer poly vinyl alcohol in
it's solvent (water) to form a polymeric solution that we c
harged it
by positive charge and ejected it to leaving it on a collector that
we charged it by negative charge and used a high voltage. and
we mixed the polymer poly vinyl alcohol with silver nitrate with
different concentrations and electro spinning the mixture to obtain
Nano fibers and Nano particles of silver then we applied heat
treatment for the whole samples at 155°c for 5 minutes for tow
aims the first one is to make crosslinking between series of PVA
and the second is for the stability of silver nanoparticles , finally
we analyze samples on Scanning Electron Microscopy SEM .
