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Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.12 [2005] >
IJCT Vol.12(2) [March 2005] >
| Title: | Rubber seed shell carbon as sequestrant of heavy metals and organic compounds from aqueous solution |
| Authors: | Okieimen, F E
Okieimen, CO
Ojokoh, F I |
| Keywords: | Activated carbon
rubber seed shells
adsorption capacity
zinc ions
alcohols |
| Issue Date: | Mar-2005 |
| Publisher: | CSIR |
| IPC Code: | B01D21/00; C02F1/42 |
| Abstract: | Powdered
activated carbon was prepared from ammonium chloride activated rubber seed
shell at 500 °C and characterized in terms of pH,
bulk density, surface area, abrasion resistance and total surface charge. The
sorption behaviour of zinc ions and alcohols (methanol, ethanol and n-propanol) on the shell carbon was
studied. The removal efficiency of the metal ions was found to depend upon the
initial metal ion concentration, with efficiency decreasing with increase in
concentration of the metal ions. By fitting the equilibrium sorption data
obtained into the Langmuir isotherm equation, values for maximum metal ions
binding capacity and affinity (binding) constant of 0.425 mmol/g and 2.614 respectively
were determined. The sorption data also fitted the Freundlich isotherm
equation, but with relatively lower correlation coefficient, and values for the
coefficient and exponent of the isotherm equation of 0.19 and 0.59 respectively
were determined. The removal efficiency of the alcohols was measured in terms
of changes in the chemical oxygen demand of solutions containing various volume
fractions of the alcohols before and after treatment with the shell carbon.
Removal efficiency was generally lower than 30%: and corresponded to about 5.82
mg/L/g decrease in chemical oxygen demand; and was highest for n-propanol and lowest for methanol. |
| Page(s): | 181-186 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.12(2) [March 2005]
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