文章摘要
沉积型微生物燃料电池对 模拟湖泊水中磷的去除
Phosphorus removal in simulating water by sediment microbial fuel cell
  
DOI:
中文关键词: 沉积物微生物燃料电池  原位修复  底泥电位  除磷
英文关键词: sediment microbial fuel cell  in situ restoration  sedimentary potential  phosphorus removal
基金项目:国家自然科学基金资助项目(91434132,51378020)
作者单位
赵楠楠1,2,赵华章1,2 1.北京大学 环境工程系北京 100871
2.教育部水沙科学重点实验室北京 100871 
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中文摘要:
      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.
英文摘要:
      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.
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