Production of selenium nanoparticles (SeNPs) by chemical approaches is costly and environmentally hazardous, whereas biological methods, especially those using bacteria, can avoid these disadvantages. In this study, rapid biogenic synthesis of SeNPs by a heavy metal-resistant bacterium Stenotrophomonas sp., strain EGS12 was investigated. SeNPs were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). TEM and SEM analysis showed that the SeNPs were spherical and ranged from 100 to 200 nm in size. EDX demonst...
