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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.12 [2005] >
IJCT Vol.12(5) [September 2005] >
| Title: | Removal and recovery of nitrate from water by ZnCl2 activated carbon from coconut coir pith, an agricultural solid waste |
| Authors: | Namasivayam, C
Sangeetha, D |
| Keywords: | Coir pith
ZnCl2 activated carbon
nitrate
adsorption isotherms |
| Issue Date: | Sep-2005 |
| Publisher: | CSIR |
| IPC Code: | C02F1/28 |
| Abstract: | Nitrate removal from
aqueous solution was investigated using ZnCl2 activated carbon
developed from coir pith. Influence of contact time, adsorbent dose, nitrate
concentration, pH and temperature were investigated. Two theoretical adsorption
isotherms namely Langmuir and Freundlich were used to describe the experimental
results. The Langmuir adsorption capacity (Qo)
was found to be 10.3 mg nitrate per g of the adsorbent. Adsorption followed
second order kinetics. Adsorption was maximum in the pH range 3-10. pH effect
and desorption studies showed that ion exchange mechanism might be involved in
the adsorption process. Effects of foreign ions such as chloride, sulphate,
phosphate and perchlorate on the removal of nitrate have also been
investigated. Removal of nitrate from ground water was also tested. Results
show that ZnCl2 activated coir pith carbon is effective for the
removal of nitrate from water. |
| Page(s): | 513-521 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.12(5) [September 2005]
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