Magnetic magnetite (Fe₃O₄) nanoparticles with average sizes of 5.11, 10.53, and 14.76 nm were synthesized by the chemical co-precipitation method. The surface area of Fe₃O₄ nanoparticles (average size of 5.11 nm) had the largest value of 167 m²/g. The adsorption capacity for removing arsenic (As(V)) from water at 3 ppm concentration was investigated by atomic absorption spectroscopy. Results showed that the As(V) adsorption capacity of Fe₃O₄ was dependent on particle size. The maximum absorption efficiency () reached 99.02%, the equilibrium time was 30 min; the maximum Langmuir isotherm adsorption capacity was 14.46 mg/g with Fe₃O₄ nanoparticle an average size of 5 nm. The results indicate that reducing the size of Fe₃O₄ nanoparticles is a promised way for As(V) ion removal from water and wastewater treatment.
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| http://dx.doi.org/10.1166/jnn.2021.19113 | DOI Listing |
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