Ceria-Coated Magnetite Nanoparticles for As(V) Removal from Water

The chapter delves into the pressing issue of water contamination, particularly focusing on the removal of arsenate (As(V)) using ceria-coated magnetite nanoparticles. It begins by outlining the global demand for clean water and the challenges posed by water contamination. The study then introduces magnetic nanoparticles, specifically Fe3O4, as potential candidates for heavy metal ion removal due to their ease of synthesis, low cost, and enhanced absorption capabilities. Ceria is highlighted for its high As adsorption capability, leading to the focus on ceria-coated Fe3O4 nanoparticles. The synthesis and characterization of these nanoparticles are meticulously described, with XRD and VSM analyses confirming their successful production and superparamagnetic behavior. Adsorption experiments reveal remarkable removal percentages exceeding 90%, with ceria-coated samples outperforming uncoated ones. The adsorption isotherm and kinetics are shown to follow the Freundlich and pseudo-second-order models, respectively. The study concludes by emphasizing the tremendous potential of these nanoparticles for water remediation, underscoring their superior adsorption percentages and ease of magnetic separation.