[article]
| Titre : |
Adsorption of chromium (III) from a tanning wastewater on kaolinite |
| Type de document : |
texte imprimé |
| Auteurs : |
E. L. Talvani, Auteur ; C. Volzone, Auteur |
| Année de publication : |
1997 |
| Article en page(s) : |
p. 143-148 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
The adsorption of chromium (III) from a tanning wastewater on a kaolinite was studied. Simultaneously, adsorptions of sodium, of chloride and of sulphate were analysed. Tests were carried out using solutions with a chromium (III) content ranging between 0.62-38.27 mmol/L. These solutions were prepared by dilution of the original wastewater without changing the ration of their constituents. The solutions before each adsorption test and the equilibrium solutions were characterised by chemical analysis, by X-ray diffraction, by scanning electron microscopy and by surface chemical analysis using an electron microprobe. The results obtained permitted us to determine the principal physico-chemical aspects of the adsorption of chromium (III) on kaolinite. Monomeric and polymeric species of chromium (III) were detected in the tannin gwastewater and in each of the solutions prepared from the original wastewater. The adsorption of chromium (III) rose steeply at low equilibrium concentrations and showed negligible changes at high equilibrium concentrations. The maximum chromium (III) adsorption determined was 0.108 meq/g of kaolinite over the concentration range studied. The Langmuir equation was used to quantify the chromium (III) adsorption. It was determined that d(001) spacing and crystal size of kaolinite changed with the chromium content, whereas, the changes of clay texture were minimal after each adsorption. Finally, it was established that the presence of chromium (III) was not homogeneous in the kaolinite bulk. |
| En ligne : |
https://drive.google.com/file/d/1slEIL98qUe-wAk_rrZHskAPKfQc8kXWe/view?usp=share [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8021 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 81, N° 4 (07-08/1997) . - p. 143-148
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Adsorption of chromium (III) from a tanning wastewater on kaolinite in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 4 (07-08/1997)
