当前位置: X-MOL 学术Electroanalysis › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A Novel Sediment Microbial Fuel Cell Based Sensor for On‐Line and in situ Monitoring Copper Shock in Water
Electroanalysis ( IF 3 ) Pub Date : 2018-09-14 , DOI: 10.1002/elan.201800424
Shaosong Wu 1, 2 , Huan Deng 1, 2 , Cheng Han 2, 3, 4 , Li Liu 1, 2 , Wenhui Zhong 2, 3, 4
Affiliation  

To online and in situ monitor the heavy metal shock in water, a novel sediment microbial fuel cell based sensor was developed with anode being inserted into flooded soil and cathode submerged in overlaying water. Immediately after CuSO4 solutions were added into the overlaying water, the voltage signal generated by the sensor reached a peak and the increment from baseline voltage to peak voltage increased linearly with Cu2+ concentrations up to 160 mg L−1. After Cu2+ shock, charge transfer resistance (Rct) of anode and cathode was determined by using electrochemical impedance spectroscopy. Soil DNA and RNA was extracted and 16S rRNA and 16S rRNA gene of dominant exoelectrogenic bacteria (Geobacter and Clostridium) was quantified. Result showed that Cu2+ shock decreased cathodic charge transfer resistance (Rct) but did not affect anodic Rct. The addition of 320 mg L−1 Cu2+ significantly reduced abundance and activity of Geobacter and Clostridium in surface soil (0–3 cm in depth) but had no effect on exoelectrogenic bacteria in deeper soil. Moreover, baseline voltage was stable after Cu2+ shock. The result indicates that the sensor could online and in situ monitor Cu2+ shock which increased voltage signal by promoting cathodic reaction without dramatically inhibiting exoelectrogenic bacteria.

中文翻译:

一种基于沉积物微生物燃料电池的新型传感器,用于在线和现场监测水中的铜冲击

为了在线和就地监测水中的重金属冲击,开发了一种新型的基于沉积物微生物燃料电池的传感器,其阳极插入淹没的土壤中,阴极浸没在上覆水中。在将CuSO 4溶液添加到上层水中之后,传感器产生的电压信号立即达到峰值,并且从基线电压到峰值电压的增量随Cu 2+浓度高达160 mg L -1线性增加。Cu 2+冲击后,电荷转移电阻(R ct阳极和阴极的α)通过使用电化学阻抗谱测定。提取土壤DNA和RNA ,定量显性外生电细菌(GeobacterClostridium)的16S rRNA和16S rRNA基因。结果表明,Cu 2+冲击降低了阴极电荷转移电阻(R ct),但没有影响阳极R ct。添加320 mg L -1  Cu 2+会显着降低土壤杆菌梭状芽胞杆菌的丰度和活性在表层土壤(深度为0–3 cm)中,但对深层土壤中的放电细菌没有影响。而且,Cu 2+冲击后基线电压是稳定的。结果表明,该传感器可以在线和原位监测Cu 2+冲击,通过促进阴极反应而增加电压信号,而不会显着抑制生电细菌。
更新日期:2018-09-14
down
wechat
bug