Study On Detection Of Heavy Metals And Antibiotics In Water By Double-microbial Fuel Cell Seneor

Water pollutants in the water are numerous and difficult to deal with.Especially,the removal of trace pollutants has become one of the focuses of today's research.The concentrations of heavy metals and antibiotics in water has become the basic index of water quality.With the occurrence of more and more water pollution and the detection of heavy metals and antibiotics in drinking water,it is urgent to establish an early warning system for early warning of water bodies and take measures in advance.Microbial fuel cell(MFC)is a new type of reactor for degrading organic matter while recovering electrical energy.In this study,double-cell microbial fuel cells(DMFCs)biotoxic sensors were developed,and the detection object was artificial wastewater,and the relationship between the concentration of the test substance and the inhibition rate was studied.The results showed that when the external resistance was 1000 ? and the external circulation rate was 0.9334 mL min-1,the reactor was running most stable and the maximum voltage was up to 240 mV.The anode was selected as the detection chamber for detection.The four kinds of heavy metals Cr(VI),Cd2+,Cu2+,Zn2+ and three antibiotics SD,SMX and ENR were selected for detection.The detection time was short and the detection range was wide for reactor.The detection time of seven kinds of substances was 60 min in DMFC-sensor,the cleaning time was 10 min.The DMFC-sensor system designed in this paper was used to detect the toxic substances in laboratory aritificial water,and the seven linear equations were established within the detection range when the single toxic substances were detected.At the same time,the removal of heavy metals and antibiotics was carried out.The results showed that the removal rate of Cu2+ was more than 70%,the lowest ENR was 36%,and the removal rate of the other five substances was more than 50%.In the process of detection of AC impedance spectroscopy,it can be concluded that both the impact of heavy metals and antibiotics would increase the anodic polarization resistance,but the polarization resistance of the cathode reduced gradually,which indicated that the anode and cathode were simultaneously acting on the DMFC reactor.Qualitative analysis of antibiotics showed that DMFC degraded antibiotics in the process of producing a variety of intermediate products,and with the intermediate production of N atoms disappeared,which indicated that the antibiotics for the DMFC provides a unique nitrogen source and was consumed,which was one of the principles of DMFC degradation of antibiotics.