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Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.16 [2009] >
IJCT Vol.16(5) [September 2009] >
| Title: | Removal of Pb(II) from aqueous solutions by using dioctyl sodium sulphosuccinate-EDTA modified Amberlite XAD-7HP resin |
| Authors: | Tharanitharan, V
Srinivasan, K |
| Keywords: | Lead(II) removal
Dioctyl sodium sulphosuccinate
EDTA
Amberlite XAD-7HP resin
Adsorption isotherms
Kinetics |
| Issue Date: | Sep-2009 |
| Publisher: | CSIR |
| Abstract: | The
removal of Pb(II) from aqueous solutions by using modified Amberlite XAD-7HP
resin has been studied. The resins have been prepared by complete mixing of
Amberlite XAD-7HP resin with anionic surfactant-dioctyl sodium sulphosuccinate
(DOSSS) and EDTA-disodium salt (Chelating agent) in an aqueous solution. SEM
studies revealed the morphological observations of the unloaded adsorbent and
thereby changes in the adsorbed polymeric resins. FTIR studies showed that the
impregnation of the extractant on the Amberlite XAD-7HP resin is achieved
partly through hydrophobic interaction between the alkyl group of the
extractant and aliphatic chain (methyl) of the support and also through polar
or electrostatic forces. The equilibrium adsorption level was determined as a
function of contact time, pH and adsorbent doses. Adsorption isotherms
of Pb(II) on adsorbent were determined and correlated with common isotherm
equations such as Langmuir and Freundlich models. The adsorption kinetics of
Pb(II) on modified XAD-7HP resin could be best described by the
pseudo-second-order model. The lead(II) ions could be successfully recovered from the modified XAD-7HP resin by treatment
with 7% NaCl. The modified XAD-7HP resins thus regenerated could be used again
to remove the heavy metal ions. The adsorbent was also tested for the removal
of Pb(II) from lead battery wastewater. |
| Page(s): | 417-425 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.16(5) [September 2009]
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