305-3 Transport and Retention of TiO2 Nanoparticles in Saturated Porous Media: Role of Ionic Strength, Valence, and Humic Acid.

See more from this Division: S02 Soil Chemistry
See more from this Session: Natural and Manufactured Nanoparticles in Soils: I
Wednesday, November 3, 2010: 11:00 AM
Long Beach Convention Center, Room 202B, Second Floor
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Michael Roberts1, Chunming Su1, Gexin Chen2 and Xuyang Liu2, (1)919 Kerr Research Drive, EPA - Environmental Protection Agency, Ada, OK
(2)National Research Council, Ada, OK
The transport and retention behavior of titanium dioxide nanoparticles (needle-like rutile particles with nominal size of 10X40 nm) has been investigated in a saturated porous medium composed of clean quartz sands by injection of stable TiO2 nanoparticles dispersions. Experiments were carried out under well-controlled solution chemistry conditions, allowing for the sensitivity of nanopartilce transport and retention characteristics to be examined under a range of ionic strength and valence (NaCl vs. CaCl2), as well as the presence and absence of 5 mg/L Suwannee River humic acid (SRHA). 
See more from this Division: S02 Soil Chemistry
See more from this Session: Natural and Manufactured Nanoparticles in Soils: I