TITLE:
Allium cepa L. Peel Extract Mediated Synthesis of Magnetite (Fe3O4) Nanoparticles: Application to the Removal of Phosphorus from Dam Water
AUTHORS:
Naminata Sangaré Soumahoro, N’guessan Louis Berenger Kouassi, Koffi Martin N’Goran, Tchimou Julien Aymard Edi, Albert Trokourey
KEYWORDS:
Green Synthesis, Onion Peels, Iron Oxide, Adsorption, Phosphorus
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.12 No.12,
December
5,
2024
ABSTRACT: Water eutrophication is generally caused by the phosphorus excessive concentration. This phenomenon may affect the water quality. Hence, phosphorus removal from dam water which is affected by agricultural activities is not well known. The present work aimed to remove phosphorus from water using green Fe3O4 nanoparticles. Green iron oxide nanoparticles were prepared using the white and purple onion peels extracts. The stable iron oxide was selected using the antioxidant activity against 1,1-Diphenyl-2-Picrylhydrazyl. The SEM, XRD and FTIR analysis were used to characterize the nanoparticles. Phosphorus adsorption experiments were done in aqueous and real water solutions. The results showed that green iron oxide mediated by purple onion peels extracts possessed better antioxidant activities. The green magnetite (Fe3O4) nanoparticles obtained with the purple onion peels extracts have an average size of 15.81 nm and their surface were covered by phytochemicals compounds. In aqueous media, the optimum initial concentration of phosphate was 10 mg/L with a maximum adsorption percentage of 92%. The phosphate adsorption in aqueous solution by Fe3O4 was well described by the Freundlich model. The maximum adsorption capacity was 32.05 mg/g. In addition, the results also revealed that the maximum adsorption percentage of phosphorus in the dam water was 50.13%. Green Fe3O4 is therefore a good agent for removing phosphorus from polluted dam water.