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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.12 [2005] >
IJCT Vol.12(5) [September 2005] >
| Title: | Removal of mercury(II) ions by adsorption onto dates nut and commercial activated carbons: A comparative study |
| Authors: | Kannan, N
Malar, S Jasmin Sugantha |
| Keywords: | Mercury(II)
activated carbon
dates nut carbon
adsorption
kinetic equations
intra-particle diffusion |
| Issue Date: | Sep-2005 |
| Publisher: | CSIR |
| IPC Code: | C02F3/00; C01B31/00; C02F101:30 |
| Abstract: | Studies on the
removal of mercury(II) ions by adsorption onto indigenously prepared dates nut
(DC) and commercial activated carbons (CAC) have been carried out with an aim
to obtain data for treating effluents from metal processing and chloralkali
industries. The effect of various process parameters has been investigated by
following the batch adsorption technique at 30±1 ºC. The percentage removal of
mercury(II) ions increased with the decrease in initial concentration and
increase in contact time and dose of adsorbent. As initial pH of the slurry
increased, the percentage removal increased and reached a maximum value. The
process parameters were optimised. Adsorption data were modeled with the Freundlich and Langmuir isotherms,
the first order kinetic equations proposed by Lagergren and Bhatacharya and
Venkobachar and Weber-Morri’s intra-particle diffusion model and the equations
models were found to be applicable. The kinetics of adsorption is observed to
be first order with intra-particle diffusion as one of the rate determining
steps. Removal of mercury(II) ions by DC and CAC is found to be favourable and
hence DC could be employed as an alternative low-cost adsorbent for effluent
treatment, especially for the removal of mercury(II) and other metal ions. |
| Page(s): | 522-527 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.12(5) [September 2005]
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