This paper deals with the synthesis and characterization of MgO, ZrO2 and MgO–ZrO2 nanosized oxides and explore their
biological and antitoxic effects. The photocatalytic efficiencies for the degradation of organic pollutants (malachite green)
and adsorption removal of inorganic pollutant (arsenic) from water samples are also discussed. The as-prepared nanooxides
were characterized by thermogravimetric – differential thermal analysis (TGA– DTA), Fourier transform infrared
spectroscopy (FTIR), powder X – ray diffraction (XRD) and high-resolution transmission electron microscope (HRTEM).
XRD patterns revealed that the nanoparticles consist mainly of (cubic) while HRTEM images show that they consist of
rectangular rode shapes with weak agglomeration with average size of 50-100 nm. The optimum conditions for the maximum
removal of dye degradation was proposed by varying the experimental parameters like initial concentration, dose, pH and
contact time.