AJALA, M.A., ABDULKAREEM, A.S., KOVO, A.S., TIJANI, J.O., and AJALA, O. E.2024-04-262024-04-262022-11-10Ajala, M.A., Abdulkareem, A.S. Kovo, A.S., Tijani, J.O. and Ajala, O.E. (2022): Assessment of removal efficiency of Ag2O-TiO2-Kaolinite clay hybrid nanocomposite developed for the treatment of Mn(II), Fe (III), Pb(II) And Cu(II) in mining wastewater. Nigerian Society of Chemical Engineers Proceedings, A.S. Osunleke & A. Giwa (Eds) 52, 137-142.978-978-57244-5-5https://uilspace.unilorin.edu.ng/handle/123456789/12991NILThis study considered the synthesis of Ag2O-TiO2-kaolinite-clay nanocomposite by the combination of green and wet impregnation method, which involves the reduction of silver nitrate and titanium tetra isopropoxide to nanoparticles with aqueous extract of Parkia biglobossa leaf. These were then immobilized on acid-activated kaolinite clay. The prepared nanomaterials' phase structure, morphology, chemical composition, and oxidation states were determined using X-ray diffraction (XRD), high-resolution scanning electrode microscopy (HRSEM), and X-ray photoelectric spectroscopy (XPS). The ability of the nanocomposite prepared to adsorb four heavy metal ions (Mn (II), Fe (III), Pb (II), and Cu (II)) from mining wastewater was examined by varying the contact time. The XRD pattern of the Ag2OTiO2- Clay reveals the synthesis of the rutile phase of TiO2 embedded in the kaolinite clay, while the HRSEM shows an evenly distributed arrangement of hemispherical stacks of kaolinites. The states of oxidation of Ag and Ti revealed by the XPS are +1 and +4 respectively either as binary or ternary nanocomposite. The Ag2O-TiO2-clay nanocomposite adsorbed 99.85%, 97.85% 95.18%, and 40% of Fe(III), Mn (II), Cu(II) and Pb(II) ions at 120 min from the mining wastewater respectively. The synergetic efforts of the Ag2O, TiO2, and acid-activated kaolinite clay was found responsible for the adsorptive capability and post-separation possibility of the Ag2O-TiO2-clay nanocomposite.enAdsorptionCharacterisationKaolineMining-wastewaterNanocompositeArticle