Synthesis and characterization of monodispersed orthorhombic manganese oxide nanoparticles produced by Bacillus sp. cells simultaneous to its bioremediation

► An efficient process wherein remediated manganese is synthesized into nanoparticles. ► A microbial process for manganese nanoparticle synthesis from metal waste streams. ► Nanoparticles characterized as monodispersed, spherical and 4.62 ± 0.14 nm sized MnO2.