dc.contributor.author |
CHUNHUA XIONG |
|
dc.date.accessioned |
2023-11-07T04:40:58Z |
|
dc.date.available |
2023-11-07T04:40:58Z |
|
dc.date.issued |
2010-08-20 |
|
dc.identifier.citation |
Felse, P. A., & Panda, T. (1999). Studies on applications of chitin and its derivatives. Bioprocess Engineering, 20(6), 505-512. |
en_US |
dc.identifier.issn |
0253-5106 |
|
dc.identifier.uri |
http://142.54.178.187:9060/xmlui/handle/123456789/19917 |
|
dc.description.abstract |
The feasibility of using chitin as an adsorbent for cadmium (II) was examined. The adsorption characteristics were studied as a function of solution pH, temperature, contact time et. al., Maximum uptake amount of cadmium (II) was estimated to 93.9 mg/g·chitin by saturated capacity method at pH 5.41 in the HAc-NaAc system. The isotherm data for cadmium (II) at pH 5.41 fitted well to a Langmuir equation with a sorption capacity of 94.3 mg/g·chitin which was in accordance with the maximum uptake amount by means of the saturation method. The apparent adsorption rate constant was k₂₈₈K = 3.34×10⁻⁵s⁻¹, k298K = 4.60×10⁻⁵s⁻¹, k308K = 6.35×10⁻⁵s⁻¹ and k318K = 9.89×10⁻⁵s⁻¹. The apparent activation energy was 63.1 kJ/mol. Thermodynamic parameters, ΔG₂₉₈K was calculated to be -19.5 kJ/mol, ΔH and ΔS were found to be 10.6 kJ/mol and 101 J/mol·K, respectively. Adsorption mechanism was also proposed using infrared spectroscopy technique(IR). |
en_US |
dc.description.sponsorship |
The chemical society of Pakistan is an approved society from the PSF. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
HEJ Research Institute of Chemistry, University of Karachi, Karachi. |
en_US |
dc.title |
ADSORPTION OF CADMIUM (II) BY CHITIN |
en_US |
dc.type |
Article |
en_US |