Esa. Hegazy et al., Separation and extraction of some heavy and toxic metal ions from their wastes by grafted membranes, J APPL POLY, 81(4), 2001, pp. 849-860
Preparation and characterization of a series of ion-exchange membranes for
the purpose of separation and extraction of some heavy and toxic metal ions
from their wastes were studied. Such ion-exchange membranes were prepared
by gamma -radiation grafting of acrylonitrile (AN) and vinyl acetate (VAc)
in a binary monomer mixture onto low-density polyethylene (LDPE) using the
direct technique of grafting. The reaction conditions at which the grafting
process proceeds successfully were determined. Many modification treatment
s were attempted for the prepared membranes to improve their ion-exchange p
roperties. The possibility of their practical use in waste-water treatment
to remove some heavy and toxic metal ions such as Pb2+, Cd2+, Cu2+, Fe3+, S
r2+ and Li+ were investigated. These grafted membranes showed great promise
for possible use in the field of extraction and removal of some heavy and
toxic metals from their wastes. (C) 2001 John Wiley & Sons, Inc.