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首页> 外文期刊>RSC Advances >Enhanced detection of toxicity in wastewater using a 2D smooth anode based microbial fuel cell toxicity sensor
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Enhanced detection of toxicity in wastewater using a 2D smooth anode based microbial fuel cell toxicity sensor

机译：使用基于2D光滑阳极的微生物燃料电池毒性传感器增强废水中的毒性检测

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As the biological recognition element of microbial fuel cell (MFC) toxicity “shock” sensors, the electrode biofilm is perceived to be the crucial issue that determines the sensing performance. A carbon felt and indium tin oxide (ITO) film anode were utilized to examine the effects of anodic biofilm microstructure on MFC toxicity sensor performance, with Pb ~(2+) as the target toxicant. The carbon felt anode based MFC (CF-MFC) established a linear relationship of Pb ~(2+) concentration ( C _(Pb ~(2+) ) ) vs. voltage inhibition ratio (IR _(2h) ) at a C _(Pb ~(2+) ) range of 0.1 mg L ~(?1) to 1.2 mg L ~(?1) . The highest IR _(2h) was only 38% for CF-MFC. An ITO anode based MFC (ITO-MFC) also revealed a linear relationship between C _(Pb ~(2+) ) and IR _(2h) at C _(Pb ~(2+) ) of 0.1 mg L ~(?1) to 1.5 mg L ~(?1) but better sensing sensitivity compared with the CF-MFC. The IR _(2h) of ITO-MFC gradually approached 100% as C _(Pb ~(2+) ) further increased. The enhanced sensing sensitivity for the ITO anode possibly originated from the thin biofilm that resulted in the efficient exposure of exoelectrogens to Pb ~(2+) . The employment of 2D conductive metal oxide with a smooth surface as the anode was able to increase the MFC sensing reliability in real wastewater.
机译：作为微生物燃料电池（MFC）毒性“休克”传感器的生物识别元件，电极生物膜被认为是决定传感性能的关键问题。利用碳毡和铟锡氧化物（ITO）薄膜阳极，以Pb〜（2+）为目标毒物，研究了阳极生物膜微结构对MFC毒性传感器性能的影响。基于碳毡阳极的MFC（CF-MFC）建立了Pb〜（2+）浓度（C _（Pb〜（2+）））与电压抑制比（IR _（2h））的线性关系_（Pb〜（2+））的范围为0.1 mg L〜（？1）至1.2 mg L〜（？1）。 CF-MFC的最高IR _（2h）只有38％。基于ITO阳极的MFC（ITO-MFC）也显示出C_（Pb〜（2+））处C _（Pb〜（2+））和IR _（2h）之间的线性关系为0.1 mg L〜（？ 1）至1.5 mg L〜（？1），但与CF-MFC相比具有更好的感测灵敏度。随着C _（Pb〜（2+））进一步增加，ITO-MFC的IR _（2h）逐渐接近100％。 ITO阳极增强的感测灵敏度可能源自薄的生物膜，从而使外生电子有效暴露于Pb〜（2+）。采用具有光滑表面的2D导电金属氧化物作为阳极能够提高MFC在真实废水中的传感可靠性。

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