|
|
|
Application of grafted
membranes for sorption of Cd2+, Fe2+
and Zn2+ ions in aqueous solution
S. A. Osemeahon*, Barminas, J. T, Aliyu, B. A
and Nkafamiya, I. I.
Department of Chemistry, Federal University of Technology,
Yola, Nigeria.
*Corresponding author. E-mail:
sundayosemeahon@yahoo.com
Accepted
19 March, 2008 |
|
|
|
|
Sorption of Cd2+,
Fe2+ and Zn2+ by blend membrane of sodium alginate
(Na-Alg) and poly (acrylamide) grafted konkoli gum (KG-g-PAAM) in
aqueous solution was studied. Membrane sorption capacities for Cd2+,
Fe2+ and Zn2+were found to be 97.85, 80.65 and
64.46% respectively. The sorption behavior with respect to contact time,
initial pH, temperature, ionic strength and initial metal ion
concentration were investigated in order to determine the optimum
sorption conditions. Results showed that metal ion uptake by the
membrane decreased with increase in ionic strength and after a
temperature of 40oC while increase in initial metal ion
concentration led to increase in metal ion uptake. Maximum sorption was
found to occur at pH of 6.0, 3.0 and 5.0 for Cd2+, Fe2+
and Zn2+ respectively. The ability of the grafted membrane to
remove some heavy metals from aqueous solution is encouraging and may be
used in bioremediation of wastewaters.
Key words:
Konkoli
gum, blending, sodium alginate, membrane, sorption, metal ions |
|
