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| 基于硫自养生物阳极的MFCs回收重金属及产电研究 |
| Investigation on heavy metal recovery and electricity generation through microbial fuel cells (MFCs) utilizing sulfur autotrophic bioanodes |
| 投稿时间：2024-03-02 修订日期：2024-04-10 |
| DOI： |
| 中文关键词: 微生物燃料电池 硫自养微生物 重金属回收 菌群组成 |
| 英文关键词: Microbial fuel cell Thioautotrophic microorganism Heavy metal recovery Flora composition |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 重金属废水污染以及金属资源短缺仍然是我国目前发展亟需解决的重要问题，MFCs作为一种环境友好、低成本的生物处理技术具有广阔的应用前景，而有机底物从经济、性能等方面限制了其应用。因此本研究以双室MFCs为基础，以硫自养微生物作为阳极产电菌，CF/MnO2为阴极材料，在不加入有机碳的条件下高效回收重金属，克服了传统微生物燃料电池外加有机碳源造成的运行成本高、二次污染等弊端。主要结论如下：系统最大功率密度为308 mW/m3，金属去除速率为2.26 mg/L/h，比空白碳毡提高了133.3%和98%。Rs和Rct分别降低19.3%和70.2%。阴极库伦效率达到 92.6%。Thiomonas、Acidithiobacillus、Halothiobacillus 为主要硫自养菌属，主要涉及Dsr和Hrd两种电子传递途径,黄素单核苷酸与类黄素等细胞色素参与阳极电子传递过程。 |
| 英文摘要: |
| The pollution of heavy metal wastewater and the scarcity of metal resources remain pressing issues that require urgent attention in China's current development. Microbial fuel cells (MFCs), as an environmentally friendly and cost-effective biological treatment technology, hold great potential for widespread application. However, the utilization of organic substrates hinders its economic viability and performance efficiency. Therefore, this study proposes a novel approach by employing sulfur autotrophic microorganisms as anode electrogenerators in two-compartment MFCs, with CF/MnO2 serving as cathode materials. This innovative design enables efficient recovery of heavy metals without the need for additional organic carbon sources, thereby overcoming the drawbacks associated with high operational costs and secondary pollution observed in traditional microbial fuel cells. The main findings are as follows: the maximum power density of the system is 308 mW/m3, and the metal removal rate is 2.26 mg/L/h, which is 133.3% and 98% higher than that of blank carbon felt. Furthermore, both Rs and Rct decrease by 19.3% and 70.2%, respectively; while maintaining a cathode coulomb efficiency reaching up to 92%. Notably, Thiomonas, Acidithiobacillus and Halothiobacillus are major sulfur autotrophs, which are mainly involved in Dsr and Hrd electron transfer pathways, and cytochrome such as flavin mononucleotide and flavoid participate in the anode electron transfer process. |
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