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Magnetic γ-Fe 2 O 3 nanoparticles synthesized by a co-precipitation method at room temperature have been used to remove As(III) and As(V) from their aqueous solutions. The adsorption of As(III) or As(V) was found to be saturated within 30min and has been interpreted in terms of a Langmuir model at different temperatures. The adsorption capacities for As(III) reached 59.25, 67.02, and...
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