Table 1, Effect of Acid Solutionon Leachability of Foliar Plutonium at Seven Days Following Exposure of Bushbean Plants to Fresh and Hydrated Plutonium Dioxide +> | Leaching Solutions Leached Component Compound Synthecic Rainwater corerrns acn 4 leached” 238 gee 238 Pu-Dioxide Soluble 0.5 40.1 Total 2.41.1 Insoluble Pu-Dioxide Soluble (Hydrated) Insoluble Total L 0.1% HNO 3 in Synthetic Rainwater 3 +---~-+<---—- 1.0 + 0.1 1.6 +1.0 2,5 + 0.6 0.6 + 0.1 4.5 4+ 0.2 3.5 + 0.7 2.0+ 1.3 2.54 1.4 5,340.5 9.8 + 0.2 l. Piants leached with 200 ml of solution (equivalent to a 7 min rainfall of 0.4cm) 2. Plant foliage exposed to polydispersed aerosois. Freshly prepared oxide had an AMAD of 1.27 um and GSD of 1.63, while the hydrated oxide had an AMAD of 0.73 um and GSD of 2.16. Count modes for the aerosols were 0.140 and 0.018 ym for the fresh and hydrated oxides, respectively. 3. Leachability expressed as wCi leachate/ (uCi leached + wCi remaining on leaves) x 100; 4 Teplicates ® + SEM Table 2. Effect of Continuous Leaching Regimes on Removal of Plutonium Particles From Leaves of Bushbean and Sugar Beetl,2 Plutonium Retained on Leaves After Leaching. Plant Species Leaf Roughness Plutonium Form Moderate Fresh Synthetic Synthetic Rainwater Rainwater + 0.1% HNOy a . Phaesolus Vulgaris (Bushbean) . 6tf Beta Vulgaris (Sugar Beet) Smooth 238 Pud., 238 Hydrated Pud,, Fresh 238 Hydrated Pud, 238 Pud, ' 97.6 + 0.9 97.0 + 0.4 95.5 + 1.2 71.6 + 6.7 82.0 + 4.9 64.7 + 9.8 95.7 + 1.1 83.0 + 3.5 1. Plants leached with 800 ml of solution (equivalent to a 28 min rainfall of 1.7 cm), 7? days following exposure. 2. Plant foliage exposed to polydispersed aerosols. Particle size data for bushbean reported in Table l. For sugar beet, fresh oxide had an AMAD of 1.59 ym and GSD of 1.76, while the hydrated oxide had an AMAD of 0.75 wm and GSD of 1.84. Count mode for the aerosols were 0.130 and 0.048 um for the fresh and hydrated oxides, respectively. 3. 4 replicate samples, = + SEM