| 摘要: |
| 沉积型微生物燃料电池(SMFC)是借助于沉积物中具有电化学活性微生物的催化作用，氧化沉积物中有机物以获得电能的一种装置，它具有用于淡水水体的原位修复的潜力.以湖泊底泥为阳极底物，含磷模拟配水为阴极液，构建了SMFC系统，研究了其产电性能及其对水中总磷去除的影响.结果表明，构建的SMFC系统可成功产电，运行22 d后输出电压达到最大值0.28 V（外电阻为1 000 Ω）.稳定运行期间，底泥烧失量由4.42%降低至1.91%；底泥氧化还原电位显著提高，由初始的-254 mV上升至-183 mV；溶液pH由初始的6.02上升至7.34；水中总磷浓度由10 mg/L降低至0.13 mg/L，这可能与SMFC使底泥电位、pH升高有关. |
| 关键词: 沉积物微生物燃料电池 原位修复 底泥电位 除磷 |
| DOI： |
| 分类号:X52 |
| 基金项目:国家自然科学基金资助项目（91434132,51378020） |
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| Phosphorus removal in simulating water by sediment microbial fuel cell |
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Zhao Nannan1,2，Zhao Huazhang1,21,2
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1.Department of Environmental Engineering,Peking University,Beijing 100871, China;2.Key Laboratory of Water and Sediment Sciences, Ministry of Education,Beijing 100871, China
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| Abstract: |
| Asediment microbial fule cell(SMFC)is aspecial type of microbial fuel cell(MFC), with electrogenic microorganisms in the sediment able to degrade organic compounds present in sediment to generateelectricity, and it has the potential of in situ restoration of freshwater. A SMFC system was constructed, with lake sediment as anode substrate andsimulating phosphorus solution as cathode solution. The electricity generation and total phosphorus (TP) removal in water were also studied. As results, the SMFC system successfully generate electricity, with the highest output voltage up to 0.28 V after 22 days’ operation (under 1 000Ω external resistance). During the stable operation of SMFC, the content of loss on ignition in sediment decreased from 4.42% to 1.91%, and meanwhile the sedimentary potential and pH significantly increased, i.e., from -254 mV、6.02 to -183 mV、7.34, respectively. Moreover, TP concentration in water obviously decreased from 10 mg/L to 0.13 mg/L in SMFC system due to the adsorption by the sediment. This may be related to the increase of sedimentary potential and pH in SMFC system. |
| Key words: sediment microbial fuel cell in situ restoration sedimentary potential phosphorus removal |
