Titlebook: Uranium in the Environment; Mining Impact and Co Broder J. Merkel,Andrea Hasche-Berger Book 20061st edition Springer-Verlag Berlin Heidelbe

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Advanced Investigations of Unconventional Uranium and Thorium Deposits by ,-EDXRF Analysis,condary uranium- and thorium-bearing phases. A current project aims at the siting of uranium and thorium mineralisation in ores from the Witwatersrand Au (uraninite), Vergenoeg Fe-F (uraniferous monazite), and Palabora Cu (uranothorite) deposits.

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ral ground water can be more than several hundreds µg/l without impact from mining, nuclear industry, and fertilizers. Considering the WHO recommendation for drinking water of 15 µg/l (has been as low as 2 µg/l before) due to the chemical toxicity of uranium the element uranium has become an importa

MIME

Effect of uranium and cadmium uptake on oxidative stress reactions for ,,activities in roots were stimulated with increasing contaminant concentrations (though generally not significantly). However, for roots exposed to 1000 µM U, enzyme activity was generally significantly reduced. In shoots no significant difference in the defense mechanism between the treatments was observed.

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Biotransformation of uranium complexed with organic ligands, (XANES) and extended X-ray absorption fine structure (EXAFS) spectroscopy analysis showed that the reduced uranium was present in solution as mononuclear U(IV)-citrate complex. These results suggest that when reduced uranium is complexed with organic ligands, it can be mobile.

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Long-term Aspects of Uranium Mining Remediation,essary and some of these objects may require maintenance..The main remediation objects in Saxony are waste rock piles, tailings ponds/deposits and underground mines. The monitoring and maintenance needs of the individual objects differ substantially and consequently the regulatory requirements (both

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Long term fate of uranium tailings in mountain areas,limit dust and radon emissions and gamma radiation and, in conjunction with the rock covers, help stabilizing the tailings to prevent dispersion of the tailings through erosion or intrusion. In some cases, piles may be moved to safer locations (e.g. deep mines). However, the long term fate of uraniu

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Rock phosphates and P fertilizers as sources of U contamination in agricultural soils,n concentrations between 6 and 149 mg/kg U were found in P containing mineral fertilizers, while mean concentrations in mineral fertilizers without P were below 1.3 mg/kg U. Mean U concentrations in farmyard manures did not exceed 2.6 mg/kg U. As a consequence, an average P dressing of 22 kg/ha P wo