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Articles by Syed Abbas Hosseini
Total Records ( 4 ) for Syed Abbas Hosseini
  Syed Abbas Hosseini
  The aim of study is to determine radio isotope absorption concentration by algae in drinking water. The drinking water with algae was prepared in the stream of Mahan City of Kerman Province, Iran. The case sub samples of drinking water were polluted by 0.5 mL of 125I among other radio nuclide 125, because of the low 125I activities in drinking water. Gamma counting was used as the determination method. Radio iodine in algae were radiated with gamma radiation and counted using gamma counting techniques. The source for the gamma emission measurement was prepared from a radioactivity aqueous solution. The activity concentration was calculated via gamma counting machine. Using evolution of 125I in the algae, absorption quantity of radionuclide was determined by 24%. The 125I activity concentrations were determined by the present study varied significantly, ranging from 135 to 210 CPM (count per minute. The high concentrations indicate an obvious lapse of environmental safety precautions. If the concentrations of Iodine-125 were so immensely high in these organisms, one shudders to think of those organisms where the radioactivity concentration of drinking water could not be so easily traced. Its conclusion can be realized that radio Iodine-125 would be absorbed by all parts of algae in the drinking water.
  Syed Abbas Hosseini and Mani Javadimehr
  The purpose of this research was study of Radio iodine adsorption, under changes in temperature variation in different soils of Iran. Six types of soil from nine different parts with alternative climate were used as a sample. In the laboratory, the samples were weighed, homogenized and sieved with 2 mm sieve. The temperature variation was provided by electrical heater for 15 min. Both case and control sub sample soils were put on electrical heater. The effect of physical property as temperatures on I125 of soils was changed. It was resulted that the radio iodine adsorption values decreased in 5, 10 and 15°C in humus soils but it increased in clay soil, coarse sand-clay soil, loamy soil, fine sand-clay soil, salty soil, fine sand-coarse sand soil in 20, 30 and 40°C temperatures. Knowledge of physical property as temperature variation effect on radio-iodine adsorption of soils is particularly essential for estimating iodide group, especially I-129 transfer to fluvial systems and for successfully measuring radio-iodine enthalpy and entropy in soil studies.
  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.
  Syed Abbas Hosseini , Syed Ali Hosseini and John Palan Javadi Mehr
  The sorption capability of the Sandy-Loamy soil for radio nuclides can be improved substantially by physical factors. Therefore, the present study was conducted to determine the effect of different temperatures on adsorption and desorption of radio iodine in the sandy-loamy soil. To the end, cultivated and non-cultivated soil samples were collected from Pardis (student’s dormitory) and Kalate razagh zadeh, in Zahedan, Iran. Furthermore, the samples were tested in batch experiments with radio iodide. Prior to the actual experiment phase, the samples were pre-treated under low and high temperature with 20 cc radio iodine 125. The results indicated that, an increase in temperature has a remarkable effect on iodide adsorption. In other words, in batch experiments with equilibrium temperatures of -10, -8, 0, 5, 60 and 70°C, iodide adsorption increases with increasing temperature. However, higher temperatures raise radio iodide adsorption only to a certain extent, but this is more pronounced for cultivated soils. In conclusion, the role of temperature was found to be the same as effects of organic matter in the soil.
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