Meunier, Nathalie; Haberman, Michaël; Blais, Jean-François 
ORCID: https://orcid.org/0000-0003-3087-4318 et Tyagi, Rajeshwar Dayal
(2003).
Utilisation et regénération des écailles de cacao pour la récupération du plomb dans les solutions acides.
Journal of Environmental Engineering and Science
, vol. 2
, nº 1.
pp. 9-16.
DOI: 10.1139/S03-003.
Résumé
Cocoa shells, a by-product of the food industry, is a promising adsorbent for the treatment of acid metal loaded wastewaters, particularly for lead removal. Elution tests carried out using different concentrations of hydrochloric acid have shown that a good portion can be eluted using a short contact time (approximately 10 min) and a diluted acid solution (0.5-1.0 M). The use of a more concentrated acid solution causes significant mineralization of the adsorbent and does not allow to improve the elution yield. Repeated adsorption-elution cycles have shown that cocoa shells can be reused for many times. However, their lead adsorption capacity progressively decreases from 19.3 mg Pb/g during the 1st cycle to 4.8 mg Pb/g during the 10th cycle. Finally, the use of successive adsorption-elution cycles is only interesting, from an economical point of view, in the case where the acid solution is used for many elution steps.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | adsorption; elution; lead; cocoa shells; effluent; acid |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 08 janv. 2021 14:12 |
| Dernière modification: | 18 févr. 2022 19:23 |
| URI: | https://espace.inrs.ca/id/eprint/11065 |
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