eng Science and Education Publishing American Journal of Nanomaterials 2372-3122 2022-05-12 10 1 1 8 10.12691/ajn-10-1-1 AJN20221011 article Chukwudi Chidozie Aguomba 1 Remy Ukachukwu Duru remy.duru@uniport.edu.ng 1 Gloria Ukalina Obuzor 1 Department of Pure and Industrial Chemistry, University of Port Harcourt, Rivers State, Nigeria Zerovalent Iron Nanoparticles (nZVI) and Aspilia africana-Zerovalent Iron Nanoparticles (Aa-nZVI) were synthesized and used to treat an industrial wastewater containing mercury, cadmium, cobalt, chromium copper, manganese, iron, zinc and lead metal pollutants. Concentrations of the metals present in the wastewater samples before and after treatment were determined using Atomic Absorption Spectrophotometer (AAS) while Fourier-Transform Infrared Spectroscopy (FTIR) was used to determine the presence of organic compounds in the Aspilia africana leaf and Aspilia africana Zerovalent Iron Nanoparticles (Aa-nZVI). Scanning electron microscopy (SEM) was used for the characterization of the synthesized nanoparticles. The results after treatment of the wastewater with different ratios (Aa-nZVI:wastewater - 1:1, 1:3, 1:6) of stabilized nanoparticle (Aa-nZVI) showed 100% removal of mercury. Removal of cadmium, chromium and copper were 100, 69 and 15% respectively by 1:1 ratio of the wastewater with the stabilized nanoparticle (Aa-nZVI). Manganese, iron, zinc and lead metals were either poorly removed, not removed or increased in concentration after treatment of the wastewater. This work presents a new and cheap method of wastewater treatment and also reveals a new usage for the Aspilia africana. http://pubs.sciepub.com/ajn/10/1/1/ajn-10-1-1.pdf Aspilia africana wastewater treatment metal pollutants nanoparticles