http://repository.iitr.ac.in/handle/123456789/2807| Title: | Adsorption thermodynamics and isosteric heat of adsorption of toxic metal ions onto bagasse fly ash (BFA) and rice husk ash (RHA) |
| Authors: | Srivastava, Vimal Chandra Mall I.D. Mishra I.M. |
| Published in: | Chemical Engineering Journal |
| Abstract: | The equilibrium sorption characteristics of cadmium (Cd(II)), nickel (Ni(II)) and zinc (Zn(II)) metal ions from aqueous solutions having respective metal ion concentrations in the range of 50-500 mmol/dm3 for two low-cost adsorbents, viz. bagasse fly ash (BFA) and rice husk ash (RHA), were studied at different temperatures in the range of 293-323 K. An increase in temperature is found to induce a positive effect on the sorption process. Toth isotherm best represents the equilibrium adsorption onto BFA and RHA. The heat of adsorption (?H0) and change in entropy (?S0) for metal adsorption on BFA and RHA are found in the range of 26-44 kJ/mol and 127-194 kJ/mol K, respectively. The isosteric heat of adsorption was quantitatively correlated with the fractional loading of metal ions onto adsorbents. The results showed that the BFA and RHA possessed heterogeneous surface with sorption sites having different activities. © 2007 Elsevier B.V. All rights reserved. |
| Citation: | Chemical Engineering Journal (2007), 132(43833): 267-278 |
| URI: | https://doi.org/10.1016/j.cej.2007.01.007 http://repository.iitr.ac.in/handle/123456789/2807 |
| Issue Date: | 2007 |
| Keywords: | Adsorption Isosteric heat of adsorption Isotherms Temperature Thermodynamics Toxic metal removal |
| ISSN: | 13858947 |
| Author Scopus IDs: | 35565811700 55664368900 23668474600 |
| Author Affiliations: | Srivastava, V.C., Department of Chemical Engineering and Technology, Institute of Technology, Banaras Hindu University, Varanasi, 221005 Uttar Pradesh, India Mall, I.D., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667 Uttaranchal, India Mishra, I.M., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667 Uttaranchal, India |
| Funding Details: | Authors are thankful to the Ministry of Human Resource Development, Government of India, for providing financial support to undertake the work. |
| Corresponding Author: | Srivastava, V.C.; Department of Chemical Engineering and Technology, Institute of Technology, Banaras Hindu University, Varanasi, 221005 Uttar Pradesh, India; email: vimalcsr@yahoo.co.in |
| Appears in Collections: | Journal Publications [CH] |
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