The relationship between concentrations of plutonium and americium in soil interstitial waters and their uptake by plants

摘要: Large soil cores (23.5 cm diameter), containing elevated concentrations of plutonium and americium derived from fuel reprocessing effluents (typically 2000–3000 but up to 10000 Bq kg−1 239,240Pu 3000–5000 15 000 241Am), were collected three zones a salt marsh in west Cumbria. The standing vegetation was removed, the placed greenhouse allowed regrow. After 2 months, regrowth harvested amount taken determined. These data, combined with data earlier, in-situ sampling pore waters analysis cores, allow estimation soil-plant transfers. If these are expressed simply as ratio activity plant tissues those soil, values lie range 10−5−10−6, comparable found by many other workers. However, solution is much higher; 40–110 l for 210–640 241Am. There appears be consistent relationship between transfer solid-solution distribution coefficient (Rd).