An experimental study of pH distributions within an electricity-producing biofilm by using pH microelectrode
An experimental study of pH distributions within an electricity-producing biofilm by using pH microelectrode
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pH微电极对发电生物膜内pH分布的实验研究
DOI：
10.1016/j.electacta.2017.08.101
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发表时间：
2017-10
影响因子：
6.6
通讯作者：
Sang Lixia
中科院分区：
文献类型：
--
作者：
Hou Junxian;Liu Zhongliang;Zhou Yu;Chen Wenwen;Li Yanxia;Sang Lixia
本研究采用pH微电极定量测定了产电生物膜及其浓度边界层和本体溶液的pH空间分布。探讨了pH分布与电流密度的关系。结果表明：（1）在350 μm厚的生物膜上，阳极表面附近的pH值为5.57，而生物膜内的pH值为6.90;（2）生物膜内的平均pH值随着时间的推移而降低;（3）生物膜内pH值的变化使循环伏安法的中点电位发生了59.0 mV/pH的偏移;（4）阳极表面附近的pH水平对于25 mM磷酸盐缓冲溶液低至4.91，而对于100 mM磷酸盐缓冲溶液为5.73。此外，还提出了一种利用pH-深度曲线的导数估算生物膜厚度的方法。
This study quantified the spatial pH distributions within an electricity-producing biofilm and its concentration boundary layer, as well as the bulk solution by employing pH microelectrode. The relationship between pH distributions and current densities was explored. It was found that (1) pH level near the anode surface was detected as low as 5.57 compared to 6.90 of the bulk solution across a 350 μm thickGeobacterbiofilm; (2) the average pH levels within the biofilm decreased over time; (3) pH variations within the biofilm shifted the midpoint potential of Cyclic Voltammetry with 59.0 mV per pH; (4) pH level near the anode surface was as low as 4.91 for a 25 mM phosphate buffer solution compared to 5.73 of that for the 100 mM. Furthermore, a method was recommended to estimate the thickness of biofilm by plotting the derivative of pH-depth profile.
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影响因子：
3.8
作者：
Babauta, Jerome T.;Hung Duc Nguyen;Harrington, Timothy D.;Renslow, Ryan;Beyenal, Haluk
通讯作者：
Beyenal, Haluk
影响因子：
9.2
作者：
Hou, Junxian;Liu, Zhongliang;Zhang, Peiyuan
通讯作者：
Zhang, Peiyuan
影响因子：
9.2
作者：
Junxian Hou;Zhongliang Liu;Siqi Yang;Yu Zhou
通讯作者：
Junxian Hou;Zhongliang Liu;Siqi Yang;Yu Zhou
影响因子：
32.5
作者：
Renslow R;Babauta J;Dohnalkova A;Boyanov M;Kemner K;Majors P;Fredrickson J;Beyenal H
通讯作者：
Beyenal H
生物膜中原位溶解氧测量系统的开发及其有效扩散系数的计算
影响因子：
3.1
作者：
Yun-Fang, Ning;You-Peng, Chen;Shan, Li;Jin-Song, Guo;Xu, Gao;Fang, Fang;Yu, Shen;Kun, Zhang
通讯作者：
Kun, Zhang