Chlorophytumrhizosphere, a suitable environment for electroactive biofilm development

The electroactivity of Chlorophytumrhizospheric soil using imposed potential chronoamperometry and a characteristic cyclic voltammetry was demonstrated in the present work. Five different polarizations were tested: − 0.3, − 0.155, 0, + 0.155, and + 0.3 V/SCE. The current density had stabilized around − 0.0068 mA/m2and − 0.03 mA/m2at − 0.155 and − 0.3 V/SCE, respectively. However, at 0, + 0.155, and + 0.3 V/SCE, a current density had reached respectively 1.46 A/m2, 1.48 A/m2, and 0.6 A/m2. The potential + 0.155 V/SCE seemed to better stimulate the electrogenic bacteria activity of the Chlorophytumrhizosphere. Different bacterial strains had formed electroactive biofilms in response to different electrode polarizations. The Chlorophytumrhizosphere electroactivity has depended on strict anaerobes as well as facultative anaerobic bacteria under anaerobic conditions. Furthermore, the Chlorophytumrhizosphere soil had closed almost equal proportions of Firmicutesand Proteobacteriawhose electroactivity seemed to depend on the Proteobacetriamore than the Firmicutesand had could be thereby a suitable environment for electroactive biofilm development.