Modification of Silica Gel with 1,10-Phenanthroline for Cd(II) and Pb(II) Adsorption
AbstractSilica gel was modified via silylation using 3-chloropropyltrimethylsilane and functionalization using 1,10-phenanthroline. FTIR, DSC and quantitative SEM-EDX data were obtained to confirm functionalization. The uptakes of cadmium (II) and lead (II) by the phenanthroline-modified silica (Phen-Si) were determined using equilibrium and dynamic methods. For the equilibrium method, percent adsorbed for 5 to 200 ppm metal ion solutions ranged from 0 % to 93.2 % (for Cd) and from 81.6 % to 95.2 % (for Pb) The maximum uptake of Phen-Si is 91.89 mg Pb/g silica and 93.06 mg Cd/g silica for the equilibrium method while for the dynamic method, maximum uptake was 25.65 ± 6.52 mg Pb/g silica and 17.68 ± 2.33 mg Cd/g silica.
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