Surface Changes of Ochrobactrum Anthropi in Cr(Ⅵ) Treatment for 1 Hour

摘要

Bioremediation has been a considerable method for treating Cr(Ⅵ ) contamination. Bacterial surface changes of Ochrobactrum anthropi during Cr biosorption was investigated in this study. We found that Cr adsorption capacity increased with the increase of initial Cr(Ⅵ ) concentration. Atomic force microscope (AFM) morphologic analysis combined with surface roughness analysis indicated that the bacterial surfaces became rougher during Cr uptake process. X-ray photoelectron spectroscopy (XPS) showed that Cr(Ⅲ) was adsorbed on the bacterial surfaces. Fourier transform infrared (FT-IR) analysis showed that surface functional groups including C-O and C-N might be involved in the Cr biosorption process.