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Updated: Aug 6, 2026
08:52
Characterizing Electron Transport through Living Biofilms
Published on: June 1, 2018
Biochar promotes the biophotoelectrochemical process driven by chlorophyll a and electroactive microorganisms
Yuting Yang1, Jingqi Zheng1, Shuyi Xie1
1Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Ocean, Guangdong University of Technology, Guangzhou 510006, China; Jieyang Branch of Chmistry and Chemical Engineering Guangdong Laboratory 7 (Rongjiang Laboratory), Jieyang 515200, China.
Bioresource Technology
|July 24, 2026
Summary
Biochar significantly boosts anaerobic reduction reactions driven by natural photocatalysts and electroactive microbes. It enhances photoelectron transfer, offering new pathways for microbial electron transfer and pollutant reduction.
Area of Science:
- Environmental Microbiology
- Biogeochemistry
- Photocatalysis
Background:
- Photoelectrons from natural photocatalysts power electroactive microorganisms in biogeochemical cycles.
- The role of biochar in these photo-driven anaerobic reduction reactions is unknown.
Purpose of the Study:
- To investigate biochar's influence on anaerobic reduction co-driven by chlorophyll a and Geobacter sulfurreducens.
- To elucidate the mechanisms behind biochar's effects on photoelectron transfer.
Main Methods:
- Established a pure culture system with chlorophyll a and Geobacter sulfurreducens.
- Assessed biochar's impact on anaerobic reduction rates.
- Utilized mutant-based assays to explore electron transfer pathways.
Main Results:
- Biochar addition significantly enhanced anaerobic reduction (97.6% vs. 83.9%).
- The non-soluble biochar fraction showed a greater enhancement than the dissolved fraction.
- Biochar facilitates photoelectron transfer and extracellular electron transfer, creating alternative pathways.
Conclusions:
- Biochar enhances photoelectrochemical reduction by improving electron transfer efficiency.
- Biochar application can optimize microbial reduction of pollutants in various environments.
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