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Removal of heavy metal ions from aqueous solutions with melon (Citrullus vulgaris) seed husks
AbstractThe removal of cadmium, copper and lead ions from aqueous solutions by melon seed husks was examined by equilibrium and dynamic sorption studies at 29°C. The amounts of the metal ions removed from solution depended on the metal ion type, and were enhanced by EDTA modification of the husks. The distribution coefficient, D, of the metal ions between the adsorbent phase and the bulk aquueous phase showed little variation with the equilibrium concentration of the metal ions, except for Pb(II) ions where the value of D doubled with a five-fold change in the equilibrium concentration. The sorption data fitted the Langmuir isotherm equation and maximum metal-ion binding capacities of 23·3 mg/g husk and 11·4 mg/g husk were predicted for Cd(II) ions and Cu(II) ions respectively. Relatively higher proportions of Pb(II) ions were removed from solution by melon husks in the column experiments. Pb(II) ions sorbed on melon husks can be quantitatively recovered by treatment with dilute acid.
Removal of heavy metal ions from aqueous solutions with melon (Citrullus vulgaris) seed husks
AbstractThe removal of cadmium, copper and lead ions from aqueous solutions by melon seed husks was examined by equilibrium and dynamic sorption studies at 29°C. The amounts of the metal ions removed from solution depended on the metal ion type, and were enhanced by EDTA modification of the husks. The distribution coefficient, D, of the metal ions between the adsorbent phase and the bulk aquueous phase showed little variation with the equilibrium concentration of the metal ions, except for Pb(II) ions where the value of D doubled with a five-fold change in the equilibrium concentration. The sorption data fitted the Langmuir isotherm equation and maximum metal-ion binding capacities of 23·3 mg/g husk and 11·4 mg/g husk were predicted for Cd(II) ions and Cu(II) ions respectively. Relatively higher proportions of Pb(II) ions were removed from solution by melon husks in the column experiments. Pb(II) ions sorbed on melon husks can be quantitatively recovered by treatment with dilute acid.
Removal of heavy metal ions from aqueous solutions with melon (Citrullus vulgaris) seed husks
Okieimen, F.E. (author) / Onyenkpa, V.U. (author)
Biological Wastes ; 29 ; 11-16
1988-11-20
6 pages
Article (Journal)
Electronic Resource
English
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