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Rapid self-assembled electroactive biohybrid cathode-driven electron transfer for enhanced uranium bioremediation
Keng-Qiang Zhong1, Le-Yi Chen2, Meng Li1
1School of Environmental Science and Engineering, Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, China.
Journal of Hazardous Materials
|August 27, 2025
Summary
This study introduces a novel biohybrid cathode for efficient uranium removal from wastewater. The new material significantly enhances uranium bioremediation, offering a sustainable solution for nuclear industry wastewater.
Area of Science:
- Environmental Science
- Materials Science
- Electrochemistry
Background:
- Bioelectrochemical systems show promise for uranium bioremediation but face limitations in biofilm formation and electron transfer.
- Efficient purification of uranium-bearing wastewater is critical for ecological safety and the nuclear energy sector.
Purpose of the Study:
- To develop a novel biohybrid cathode for enhanced uranium and sulfate removal from wastewater.
- To improve biofilm formation and electron transfer dynamics for more effective uranium bioremediation.
Main Methods:
- A sulfate-reducing bacteria-carbon cloth biohybrid cathode (CF-PQ7) was constructed using cotton-derived carbon fibers and polyquaternium-7.
- Electrochemical characterizations and spectroscopic analysis were employed to evaluate biofilm formation and performance.
Main Results:
- The CF-PQ7 biocathode achieved a 93.8% uranium removal efficiency, a significant improvement over existing methods.
- The modified carbon fibers promoted efficient electron transfer, and polyquaternium-7 facilitated rapid self-assembled electroactive biofilm formation.
- The strategy enhanced biofilm viability and detoxification capacity.
Conclusions:
- The developed CF-PQ7 biocathode offers a safe, clean, and sustainable strategy for uranium bioremediation.
- This approach presents new opportunities for addressing uranium contamination in wastewater.
