Hydrous bismuth oxides (HBOs) have the sorptive property to remove nitrate from water. HBOs are also efficient in removing other competitive anions like bicarbonates and sulfates from water. To use HBOs as sorptive filtration media, their characteristics in terms of crystallinity and particle size are important. The objective of this study was to explore the kinetic and equilibria study of HBOs for the removal of nitrate from water. For the present study, three hydrous bismuth oxides, , , and , were prepared under increasing volumetric presence of hydroxide. Both and were found to be almost equally efficient for nitrate removal from aqueous solutions. Because is a superior bismuth oxide, kinetic and equilibrium studies were performed with . X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM) techniques were used to characterize the adsorbents. The pH of point of zero charge () of the HBOs also supported the results of the removal of nitrate.