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Asian Journal of Applied Sciences

Year: 2011 | Volume: 4 | Issue: 6 | Page No.: 596-602
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Authors

Syed Abbas Hosseini

Syed Ali Hosseini

Keywords

Review Article

Ecology of Soils Polluted with Radio Nuclides: A Review

Syed Abbas Hosseini and Syed Ali Hosseini
The purpose of this study was the review of radio nuclides transfers to plant/soil by mycorrhizas, soil animals and soil microbes. Radio iodine 125 is as a surrogate of I-129 which has complex ecosystems because they can involve diverse reaction with soil type, plant species and vegetative. High variability is observed in radio iodine migration and redistribution patterns in contaminated soils. In the long term, the soil compartment represents the major reservoir of radio iodine which can give rise to long-term plant and hence food contamination. The contamination of various specific plant products has commonly been quantified using the transfer factor which integrates various environmental parameters including soil and plant type, root distribution as well as nature and vertical distribution of the deposits. Long lasting availability of some radio iodine was to be source of much transfer in plant/soil ecosystems in soils. Transport of radioiodine to lower layers proceeds very slowly. The experiment indicated that I 125 was mobile only within the saturated/low redox zone at the base of the soil column and accumulated in the zone of transition between anoxic and oxic soil conditions. Maximum contamination of tree components with radio iodine was associated with hydro morphic areas with thick humus layers. The rate of contaminant was being determined by the dynamics of radio iodine in aquatic ecosystems. A model had been developed by applying the selection of plant varieties used for animal feeding, the plants' growing cycles and harvests, the animal feeding practices and the human consumption rates for iodine radioactivity in soil, plants and animal products.
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