微生物燃料电池型人工湿地去除四环素机理研究

Study on mechanism of removal of tetracycline by microbial fuel cell coupled constructed wetland

四环素是一种重要的抗生素,广泛存在于自然水体中,对环境造成潜在危害。本文采用人工湿地(Constructed Wetland, CW)和微生物燃料电池型人工湿地(Microbial fuel cell -Constructed Wetland,MFC-CW)两种方式对四环素进行去除,试验结果显示:当MFC-CW运行稳定后,测定其电压为561±10 mV,并且持续保持稳定状态。最大功率密度为0.0572 W/m 2,对应电流密度为0.2675 mA/m 2,MFC-CW内阻为395.3Ω。CW和MFC-CW对COD Cr 去除率为别为85.1%和90.41%,出水中四环素浓度为分别为0.87~3.92 μg/L和 0.31~0.91 μg/L, MFC- CW较CW而言具有更高的污染物去除效能。

Tetracycline is an important antibiotic that is widely found in natural waters and poses a potential hazard to the environment. In this paper, Constructed Wetland (CW) and Microbial Fuel Cell-Constructed Wetland (MFC-CW) were used to remove tetracycline. The test results showed that when MFC-CW was in stable operation, its voltage is measured to be 561 ± 10mV and remains stable. The maximum power density is 0.0572 W/m 2, the corresponding current density is 0.2675 mA/m 2, and the internal resistance of MFC-CW is 395.3 Ω. The removal rates of COD Cr for CW and MFC-CW are 85.1% and 90.41%, and the concentrations of tetracycline in effluent are 0.87-3.92μg/L and 0.31-0.91μg/L, respectively. MFC-CW has a higher pollutant removal efficiency compared to CW.