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Behavior Of Technetium 99 In Soils And Plants Final Report April 1 1974 December 31 1978
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Book Synopsis Behavior of Technetium-99 in Soils and Plants. Final Report, April 1, 1974--December 31, 1978 by :
Download or read book Behavior of Technetium-99 in Soils and Plants. Final Report, April 1, 1974--December 31, 1978 written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies described in this report were aimed at establishing the magnitude and mechanisms of /sup 99/Tc sorption by soils and uptake by plants. Results show that /sup 99/Tc was sorbed from solution over a period to two to five weeks by 8 of 11 soils studies. The slow rate of sorption, the lack of sorption by low organic matter soils, the elimination of sorption following sterilization and increased sorption following addition of dextrose all point to a microbial role in the sorption process. However, it has not been established whether this is a direct or indirect role nor is it possible to clearly predict the conditions under which sorption will occur. Results of plant uptake studies show that /sup 99/Tc can be taken up and translocated into the photosynthetic tissue of higher plants with concentrations in seeds being much less than in vegetative tissue. Technetium-99 was also shown to be toxic to plants at low concentrations and evidence suggests that this is a chemically rather than radiologically induced toxicity. However, this remains to be completely resolved as well as whether there is a threshold level of /sup 99/Tc required before toxicity occurs. Studies of short-term, dynamic, aerobic systems indicated that /sup 99/Tc moves through the soil as a relatively large anion exhibiting characteristic miscible displacement with some asymmetric tailing. /sup 99/Tc exhibits greater retention that C1/sup -/, which may be attributed statistically to weak complexion by organic matter. It is unlikely that this retention phenomenon is related to the static sorption activity reported in the first part of this study.
Book Synopsis Behavior of Technetium-99 in Soils and Plants. Progress Report, April 1, 1974--March 31, 1975 by :
Download or read book Behavior of Technetium-99 in Soils and Plants. Progress Report, April 1, 1974--March 31, 1975 written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1979 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Behavior of Technetium in Soil and Vegetation by : Frank Owen Hoffman
Download or read book Environmental Behavior of Technetium in Soil and Vegetation written by Frank Owen Hoffman and published by . This book was released on 1982 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sampling of Technetium-99 in Vegetation and Soils in the Vicinity of Operating Gaseous Diffusion Facilities by :
Download or read book Sampling of Technetium-99 in Vegetation and Soils in the Vicinity of Operating Gaseous Diffusion Facilities written by and published by . This book was released on 1980 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technetium in the Environment by : G. Desmet
Download or read book Technetium in the Environment written by G. Desmet and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the discovery of technetium (in 1937, by Perrier and Segre), technetium-99 and technetium-99m have become most familiar in the specialised literature, the behaviour of the former being of concern regarding its health impact, the latter having been used intensively in medical tests for many years. The knowledge of the characteristics and behaviour of this element in nature is currently increasing exponentially. It has become clear, however, that there is still a serious shortage of information needed to assess properly its burden and impact on man and his environment. Technetium may indeed be released from nuclear installations or as a waste product from medical applications. It is generally considered to be highly mobile as the anion TcOi, but it is also suspected to be readily reduced in soils and metabolised in living beings into lower oxidation states. The seminar was planned to analyse thoroughly the experimental results obtained up to now and to make recommendations of specific issues requiring further research. This book presents the papers of the different sessions in the order of presentation, and the conclusions drawn by three discussion groups which dealt separately with: problems of sources and distribution of man-made technetium and its radiological consequences; the chemical behaviour of technetium in different ecosystems; biochemical reactions and binding with macromolecules in various life systems. vi Preface The editors, together with the Programme Committee of the Seminar, wish to express their gratitude to the chairmen of the different sessions for their summary of the group discussions.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1980 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Behavior of Technetium-99 in Soils and Plants by : Edward Robert Landa
Download or read book The Behavior of Technetium-99 in Soils and Plants written by Edward Robert Landa and published by . This book was released on 1975 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of Technetium-99 in Soils and Plants by :
Download or read book Behavior of Technetium-99 in Soils and Plants written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Work described in this report is aimed at establishing the magnitude and mechanisms of $sup 99$Tc sorption by soils and uptake by plants. Studies showed that sorption of $sup 99$Tc by soils was essentially stopped by sterilization of the soil, further indicating that the sorption process is related to microbial activity. Studies also showed that sorption can occur under aerobic as well as anerobic conditions. However, there was considerable difference in the extent of sorption for different soils which remains to be explained. $sup 99$Tc was shown to be toxic to germinating seeds at low concentrations, but not when added to more mature plants. Initial evidence suggests this is a chemically rather than a radiologically induced toxicity but this remains to be completely resolved as well as whether there is a threshold level of $sup 99$Tc required before toxicity occurs. (auth).
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1980 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book INIS Atomindex written by and published by . This book was released on 1980 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Factors Effecting Technetium-99 Behavior in Soils and Plants by : Lisa Hart Thorvig
Download or read book Factors Effecting Technetium-99 Behavior in Soils and Plants written by Lisa Hart Thorvig and published by . This book was released on 1978 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Boletim by : Instituto de Energia Atômica (Brazil). Biblioteca
Download or read book Boletim written by Instituto de Energia Atômica (Brazil). Biblioteca and published by . This book was released on 1977 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Pollution & Control by :
Download or read book Environmental Pollution & Control written by and published by . This book was released on 1982 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environment Abstracts written by and published by . This book was released on 1979 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiochemical Analysis written by and published by . This book was released on 1964 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Environment Index written by and published by . This book was released on 1978 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt:
