BOUAOUINE, Omar; BOURVEN, Isabelle; KHALIL, Fouad; BRESSOLLIER, Philippe; BAUDU, Michel

doi:10.1016/j.seppur.2018.09.036

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

Langue

Article de revue

Ce document a été publié dans

Separation and Purification Technology. 2019, vol. 209, p. 892-899

Résumé en anglais

Opuntia ficus indica has been identified for its bioflocculant properties in water treatment; however, its underlying mechanism and active compounds have not been clearly identified. Flocculent molecules of cactus solid material (CSM) under alkaline conditions were extracted at pH 10 and then precipitated under neutral conditions (pH 7). The precipitate was fractionated by ultrafiltration systems and analyzed using inverted phase chromatography and enzymatic treatments. This approach revealed that quercetin and starch constitute the active agents found in the fractionated parts at ≤3,000 and ≥10,000 Da, respectively. The use of quercetin or (potato) starch alone at 18 mg/L yielded 72% ± 2% and 54% ± 3% of turbidity removal, respectively. With a combination of both these components, a higher flocculation activity (84% ± 2%) could be obtained. From these experimental results, a flocculation model based on identified active constituents is being proposed in order to improve process knowledge.< Réduire

Mots clés en anglais

Bioflocculation

Opuntia ficus indica

Quercetin

Starch

Model

Métadonnées

Partager cette publication !

Licence d’utilisation du document

Identification and role of Opuntia ficus indica constituents in the flocculation mechanism of colloidal solutions

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

URI

DOI

Unités de recherche