A synergistic bioelectrochemical-photocatalytic system for efficient uranium removal and recovery.
J Hazard Mater
; 479: 135739, 2024 Nov 05.
Article
in En
| MEDLINE
| ID: mdl-39243536
ABSTRACT
Bioelectrochemical system (BES) is a promising technology for uranium recovery, which also enables simultaneous electricity generation. However, the bioelectrochemical recovery of uranium is hindered by its slow process due to the low reduction potential provided by microorganisms. Herein, we developed an innovative bioelectrochemical-photocatalytic system (BEPS) that combines the advantages of BES and photocatalysis, achieving enhanced uranium removal and recovery. The photogenerated electrons in BEPS possess a more negative reduction potential and stronger reduction capability than microbial electrons in BES, significantly accelerating uranium reduction and deposition on the electrode surface. Moreover, the electrons from the bioanode combine with photogenerated holes through the external circuit, effectively inhibiting the recombination of charge carriers. The BEPS significantly enhances uranium removal efficiency, kinetic, and electricity generation through a synergistic coupling mechanism between the bioanode and photocathode. Notably, the UO2 deposited on the electrode surface exhibited a recovery efficiency of 98.21 ± 1.37%, and the regenerated electrode sustained its photoelectric response and uranium removal capabilities. Our findings highlight the potential of the BEPS as an effective technology for uranium recovery and electricity generation.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
J Hazard Mater
/
J. hazard. mater
/
Journal of hazardous materials
Journal subject:
SAUDE AMBIENTAL
Year:
2024
Document type:
Article
Country of publication:
Países Bajos