微生物燃料电池阳极碳材料对垃圾渗滤液COD检测性能的影响

Effects of carbon-based anode materials on the COD detection performance of microbial fuel cell with landfill leachates

分别以碳毡(CF)、碳刷(CB)和碳布(CC)作为阳极材料构建了3组双室型微生物燃料电池(MFC)传感器:MFC-CF、MFC-CB和MFC-CC,考察了这3种阳极材料对MFC传感器电化学性能的影响,结果表明:MFC-CF的电化学性能最好,其最大输出电压为600.44 mV,分别是MFC-CB和MFC-CC的1.29倍和1.55倍;MFC-CF的最大输出功率密度为265.95 mW/m^(2),显著高于MFC-CB(167.54 mW/m^(2))和MFC-CC(123.13 mW/m^(2))。分别以最大输出电压和累计电荷量为检测信号考察了3组MFC传感器对垃圾渗滤液COD的检测性能,结果显示:3组MFC传感器的有效检测范围均为10~500 mg/L;MFC-CF的检测灵敏度为1.038 mV·L/mg和0.015 C·L/mg,显著高于MFC-CB和MFC-CC;3组MFC传感器对垃圾渗滤液COD检测时均表现出良好的准确性,最大相对误差分别为11.20%(以最大输出电压为检测信号)和15.75%(以累计电荷量为检测信号)。

Three sets of dual-chamber microbial fuel cell(MFC) sensors were constructed using carbon felt(CF), carbon brush(CB) and carbon cloth(CC) as anode materials, denoted as MFC-CF, MFC-CB and MFC-CC, respectively. The effects of these three anode materials on the electrochemical performance of MFC sensors were investigated. The results show that MFC-CF had the best electrochemical performance, and its maximum output voltage was 600.44 mV, which was 1.29 times and 1.55 times that of MFC-CB and MFC-CC, respectively. The maximum output power density of MFC-CF was 265.95 mW/m^(2), much higher than the values for MFC-CB(167.54 mW/m^(2)) and MFC-CC(123.13 mW/m^(2)). The detection performance of the three MFC sensors for landfill leachate COD was investigated by using the maximum output voltage and cumulative charge as detection signals. The results showed that the effective detection range of three MFC sensors was 10-500 mg/L. The detection sensitivity of MFC-CF was 1.038 mV·L/mg and 0.015 C·L/mg, significantly higher than the corresponding values for MFC-CB and MFC-CC. The three MFC sensors showed good accuracy in landfill leachate COD detection, and the maximum relative errors were 11.20%(with the maximum output voltage as the detection signal) and 15.75%(with the cumulative charge as the detection signal).