微生物电合成系统还原二氧化碳产甲烷的电势依赖性

被引：4

作者：

鲍白翎 ^{[1
,2
]}

杨厚云 ^{[2
]}

苏馈足 ^{[1
]}

穆杨 ^{[2
]}

机构：

[1] 合肥工业大学土木与水利工程学院

[2] 中国科学技术大学化学与材料科学学院

来源：

应用与环境生物学报 | 2017年 / 23卷 / 06期

关键词：

微生物电合成系统(MES); 二氧化碳; 甲烷; 阴极电势; Methanobacterium;

D O I：

暂无

中图分类号：

X172 [环境微生物学]; X701 [废气的处理与利用];

学科分类号：

071012 ; 0713 ; 083002 ;

摘要：

二氧化碳（CO2）资源化利用是近年来的一个研究热点,利用生物电化学系统还原CO2生产能源物质是一种新兴技术.在微生物电合成系统（MES）中利用混合微生物富集阴极功能微生物,评估阴极电势对其还原CO2产甲烷的影响.当阴极电势从-0.70 V降低到-0.90 V vs Ag/Ag Cl时,MES产甲烷的量和速率都在增加,最大的产甲烷量和速率分别达到了0.265 mol/m2和0.025 mmol/h.与此同时,MES的电流密度从0.002 A/m2增加到0.18 A/m2,阴极产甲烷的库伦效率在49%和90%之间.当阴极电势更负时,MES阴极几乎不产甲烷.扫描电镜分析（SEM）表明,有多种不同形态的微生物吸附在阴极碳毡上,它们的形态主要呈杆状和球状.16S r DNA测序分析表明Methanobacterium是MES阴极生物膜上优势的产甲烷菌.本研究表明,微生物电合成系统还原CO2产甲烷的阴极电势必须控制在适当的范围内,才能高效地还原CO2产甲烷.

引用

页码：968 / 973

页数：6

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