(162d) The Separation of Sulfur Dioxide From Air Using Magnetic Nanoparticles

The Separation of Sulfur Dioxide from Air Using Magnetic
Nanoparticles

T. Grant Glover*, Daniel Sabo⁺, Lisa A. Vaughan⁺,
Joseph A. Rossin^#, Z. John Zhang⁺

*SAIC, Gunpowder Branch, P.O Box 68, APG, Maryland 21010

⁺Georgia Institute of Technology School of
Chemistry and Biochemistry,

901 Atlantic Drive, Atlanta, Georgia, 30332

^#Guild Associates, Incorporated, 5750 Shier-Rings
Road, Dublin, Ohio 43016

The
adsorption of sulfur dioxide on magnetic nanoparticles is examined. 
Microbreakthrough experiments were used to quantify the ability of magnetic
nanoparticles to adsorb sulfur dioxide from air.  The results show that the magnetic
nanoparticles out perform traditional activated carbon.  The adsorption
capacity of the materials is noteworthy given the 150 m²/g surface
area of the magnetic nanoparticles.  Additionally, the nanoparticles exhibit a
23% decrease in the remnant magnetization, a 20% decrease in saturation
magnetization, and a 9% decrease in coercivity.  Adsorbents that provide a
magnetic signal upon adsorption could have broad implications on
adsorption-based separations.