The College of Education for Pure Sciences, Department of Chemistry, has submitted a master's thesis on "Preparation, Characterization, and Biochemical Study of Some Carbon Nanocomposites." The thesis, presented by researcher Maryam Aqeel Rahim, addressed the preparation and biochemical study of some carbon nanocomposites. Three nano-oxides of zinc, silver, and zirconium were prepared and loaded onto the surface of multi-walled carbon nanotubes. They were characterized using several techniques, including X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, UV-vis spectroscopy, and BET analysis. They were then used to remove two types of toxic and carcinogenic dyes from their aqueous solutions using the adsorption technique. The results showed that the trioxides loaded onto the surface of multi-walled carbon nanotubes recorded the highest removal of methyl green dye, with an adsorption capacity of 247.6 mg/g and a removal rate of 99.04%, and for erythrocyanin B dye, an adsorption capacity of 99.89 mg/g. The removal rate was 99.89%, while the results of the zinc and silver dioxide surface loaded on multi-walled carbon nanotubes showed a higher removal of methyl green dye with an adsorption capacity of 241 mg/g and a removal rate of 96.40%, while the results of the trioxides of zinc, silver and zirconium against human liver cancer cells showed an IC50 value of 56.96 µg/ml and 80.31 µg/ml against breast cancer

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