Enhanced quorum sensing of anode biofilm for better sensing linearity and recovery capability of microbial fuel cell toxicity sensor

TY - JOUR

T1 - Enhanced quorum sensing of anode biofilm for better sensing linearity and recovery capability of microbial fuel cell toxicity sensor

AU - Pan, Jingyi

AU - Hu, Jingping

AU - Liu, Bingchuan

AU - Li, Jianfeng

AU - Wang, Dongliang

AU - Bu, Chenpeng

AU - Wang, Xiaoxuan

AU - Xiao, Keke

AU - Liang, Sha

AU - Yang, Jiakuan

AU - Hou, Huijie

N1 - Publisher Copyright: © 2019 Elsevier Inc.

PY - 2020/2

Y1 - 2020/2

N2 - MFC toxicity sensor has major hindrances that limit its practical application, such as the poor concentration-response relationship and inferior recovery capability after high toxicity shock. Till now, the direct influence of intrinsic properties on the performance of MFC toxicity sensor has not been well understood. Quorum sensing (QS) is a cell-to-cell communication strategy that indirectly affects the intrinsic properties of electroactive biofilms. In this work, commercially available QS autoinducers (AHLs) were applied to MFC toxicity sensor to manipulate anode biofilm for better sensing performance. The results showed that the addition of AHLs (C6-HSL, 3-OXO-C12-HSL) led to higher sensing linearity to a wider range of Pb2+. The voltage of MFC sensors with AHLs addition fully recovered even after 10 mg/L Cu2+ shock, indicating an enhanced recovery capability of MFC toxicity sensor. It was found that higher live/dead cells ratio and increased exoelectrogen Geobacter abundance were responsible for the superior sensing linearity and recovery capability of MFC toxicity sensor. Our work presented a novel and effective way to advance the process of MFC toxicity sensor application from the perspective of EABs.

AB - MFC toxicity sensor has major hindrances that limit its practical application, such as the poor concentration-response relationship and inferior recovery capability after high toxicity shock. Till now, the direct influence of intrinsic properties on the performance of MFC toxicity sensor has not been well understood. Quorum sensing (QS) is a cell-to-cell communication strategy that indirectly affects the intrinsic properties of electroactive biofilms. In this work, commercially available QS autoinducers (AHLs) were applied to MFC toxicity sensor to manipulate anode biofilm for better sensing performance. The results showed that the addition of AHLs (C6-HSL, 3-OXO-C12-HSL) led to higher sensing linearity to a wider range of Pb2+. The voltage of MFC sensors with AHLs addition fully recovered even after 10 mg/L Cu2+ shock, indicating an enhanced recovery capability of MFC toxicity sensor. It was found that higher live/dead cells ratio and increased exoelectrogen Geobacter abundance were responsible for the superior sensing linearity and recovery capability of MFC toxicity sensor. Our work presented a novel and effective way to advance the process of MFC toxicity sensor application from the perspective of EABs.

KW - Microbial fuel cell

KW - Quorum sensing

KW - Recovery capability

KW - Sensing linearity

KW - Toxicity sensor

UR - http://www.scopus.com/inward/record.url?scp=85075369094&partnerID=8YFLogxK

U2 - 10.1016/j.envres.2019.108906

DO - 10.1016/j.envres.2019.108906

M3 - 文章

C2 - 31740039

AN - SCOPUS:85075369094

SN - 0013-9351

VL - 181

JO - Environmental Research

JF - Environmental Research

M1 - 108906

ER -