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A study of Adsorption of Lead (II) and Chromium (III) ions from Aqueous Solution on local Chaff | ||
| journal of al-qadisiyah for pure science(quarterly) | ||
| Article 1, Volume 12, Issue 3, 2012, Pages 104-114 PDF (0 K) | ||
| Authors | ||
| Abdul- Muhsen Al-Haidari; Saja S. Jabbar Al-Taweel; Laith S. Jassim | ||
| Abstract | ||
| In the present study, Chaff was used as an adsorbent for removing Pb(II) and Cr(III) ions from aqueous solutions. The amounts of adsorbed ions were estimated were carried out by using flame atomic absorption spectrophotometer. The effects of initial metal ions concentration, pH, existing salt and temperature were studies. The adsorption isotherms are of L-curve type according to Giles classification and the experimental data were best fitted to Langmuir and Freundlich isotherm models. The adsorption phenomenon was examined as a function of temperature (25, 40 and 55oC) and various thermodynamic parameters (Ho, So and Go) have been calculated. The thermodynamic parameters of metal ion-chaff systems indicated the adsorption processes is a non-spontaneous. The results indicated that the adsorption extent of metal ions onto chaff increased with increasing the pH of solution and it was decreased with increasing ionic strength of solution. In the present study, Chaff was used as an adsorbent for removing Pb(II) and Cr(III) ions from aqueous solutions. The amounts of adsorbed ions were estimated were carried out by using flame atomic absorption spectrophotometer. The effects of initial metal ions concentration, pH, existing salt and temperature were studies. The adsorption isotherms are of L-curve type according to Giles classification and the experimental data were best fitted to Langmuir and Freundlich isotherm models. The adsorption phenomenon was examined as a function of temperature (25, 40 and 55oC) and various thermodynamic parameters (Ho, So and Go) have been calculated. The thermodynamic parameters of metal ion-chaff systems indicated the adsorption processes is a non-spontaneous. The results indicated that the adsorption extent of metal ions onto chaff increased with increasing the pH of solution and it was decreased with increasing ionic strength of solution. | ||
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