生物合成FeS纳米颗粒加速海洋硫酸盐还原菌Desulfovibrio bizertensis SY-1胞外电子传递研究OA北大核心

In order to reveal the regulation mechanism of biosynthesized FeS(Bio-FeS)on the extracellular electron transfer(EET)of the marine sulfate-reducing bacterium Desulfovibrio bizertensis SY-1(D.bizertensis SY-1),the addition of 20 mg/L,40 mg/L,60 mg/L,80 mg/L,and 100 mg/L Bio-FeS to the D.bizertensis SY-1 system with 20 mg/L,40 mg/L,60 mg/L,80 mg/L and 100 mg/L of Bio-FeS was analyzed and tested by chronoamperometry(I-t),electrochemical impedance spectroscopy(EIS),differential pulse voltammetry(DPV)and cyclic voltammetry(CV).The results showed that the bioelectrical current was significantly enhanced by the addition of Bio-FeS,and Bio-FeS promoted the synthesis of D.bizertensis SY-1 cytochrome c and thus enhanced the redox activity,and also enhanced the electrode interfacial charge storage capacity,lowered the intra-system charge transfer resistance and solution resistance,and increased the EET efficiency of D.bizertensis SY-1.electron transfer efficiency.This study provides new ideas for microbial corrosion protection in marine engineering and the design of electron mediators for microbial fuel cells(MFCs).