A Rechargeable Biomineral Induced by the Sulfate-reducing Bacterium Nitratidesulfovibrio sp. HK-II.

ABSTRACT: A sulfate-reducing bacterium was isolated from the anode surface of a microbial fuel cell (MFC) producing a high current density. 16S rRNA gene ana-lyses showed that the isolate was affiliated with the genus Nitratidesulfovibrio, and the strain was named HK-II. When Nitratidesulfovibrio sp. strain HK-II was incubated anaerobically under sulfate-reducing conditions with Fe(III) citrate, a black precipitate formed. The resulting black precipitate was investigated using multidisciplinary methods. An X-ray diffraction (XRD) ana-lysis revealed that the black precipitate was mainly composed of mackinawite. A cyclic voltammetry ana-lysis showed clear redox peaks, and biogenic mackinawite possessed rechargeable properties. The XRD ana-lysis also showed that the form of the rechargeable biogenic mi

SUBMITTER: Arashi Y 

PROVIDER: S-EPMC12501878 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature