Arrêt de service programmé du vendredi 10 juin 16h jusqu’au lundi 13 juin 9h. Pour en savoir plus
Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Biological As(III) Oxidation Coupled with As(V) Interception by Fibrous Anion Exchange Material FFA-1

Abstract : A combined process, including As(III) oxidation and As removal by the fibrous anion exchange material FFA-1, was established to treat arsenite ([As(III)] = 10 mg L−1)-polluted groundwater. Both fixed-bed reactors (R1 and R2) were separately filled with pozzolana and FFA-1. After 72 h of inoculation and 10 days of operation, As(III) oxidation efficiency reached around 100% and the total As in the effluent was below 10 µg L−1 for over 100 days. Then, the combined system was stopped and a desorption experiment on the FFA-1 collected from R2 was carried out. The results revealed that the As trapped by the FFA-1 was distributed linearly along the axial length of R2, and the maximum capacity for removal of the FFA-1 from R2 was about 28 mg As g−1 FFA-1. Moreover, the anions’ competing test showed that they were preferentially sequestrated by the FFA-1 according to the following order: SO42− > PO43− ≈ AsO43− > NO3− at neutral pH. Furthermore, the microorganisms attached to the FFA-1, including some arsenite-oxidizing microorganisms (AsOBs), could be a beneficial complement to the As(III) oxidation and, thus, the total As removal. At the same time, the regeneration test proved that the As(V) interception capacity of FFA-1 was barely affected by the presence of biofilm. Additionally, the calculated operating cost showed that this combined process has great potential for the remediation of As-polluted groundwater.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal-brgm.archives-ouvertes.fr/hal-03660088
Contributeur : Frédérique Couffignal Connectez-vous pour contacter le contributeur
Soumis le : jeudi 5 mai 2022 - 15:22:36
Dernière modification le : vendredi 6 mai 2022 - 03:42:59

Fichier

water-14-00856-v2.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Licence


Distributed under a Creative Commons Paternité 4.0 International License

Identifiants

Collections

Citation

Junfeng Wan, Rattanak Hai, Yucong Zhang, Lihui Cui, Xiaoying Guo, et al.. Biological As(III) Oxidation Coupled with As(V) Interception by Fibrous Anion Exchange Material FFA-1. Water, MDPI, 2022, 14 (6), pp.856. ⟨10.3390/w14060856⟩. ⟨hal-03660088⟩

Partager

Métriques

Consultations de la notice

0

Téléchargements de fichiers

0