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Virus Retention and Transport as Influenced by Different Forms of Soil Organic Matter

Department of Plant and Soil Sciences, Univ. of Delaware, Newark, DE 19717-1303

View larger version (25K): [in a new window]   Fig. 1. Bromide breakthrough from eight saturated columns. GA, Georgia soil; OM, organic matter; WWS, water-washed sand. The terms WWS + 1HA, WWS + 5HA, and WWS + 50HA refer to virus transports through WWS in phosphate-buffered saline (PBS) solution containing 1, 5, and 50 mg L-1 humic acid, respectively.

View larger version (26K): [in a new window]   Fig. 2. Breakthrough curves of (a) MS-2 and (b) X174 from columns packed with water-washed sand (WWS) and organic matter (OM)–coated WWS.

View larger version (24K): [in a new window]   Fig. 3. Breakthrough curves of (a) MS-2 and (b) X174 from columns packed with water-washed sand (WWS) and oxides-removed WWS.

View larger version (21K): [in a new window]   Fig. 4. Breakthrough curves of (a) MS-2 and (b) X174 from columns packed with Georgia soil (GA) and organic matter (OM)–removed GA soil.

View larger version (30K): [in a new window]   Fig. 5. Breakthrough curves of (a) MS-2 and (b) X174 from water-washed sand (WWS)–packed columns in phosphate-buffered saline (PBS) solution containing different concentrations of dissolved humic acid (HA).

View larger version (32K): [in a new window]   Fig. 6. Breakthrough curves of dissolved humic acid (HA) from (a) water-washed sand (WWS)–packed columns and (b) dynamics of amount of HA sorption. The insert was plotted based on the sorption data of HA at approximately 19.5 pore volumes (PVs) in the three column experiments.