Environmental geochemistry of technetium View Full Text


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Article Info

DATE

2017-02-07

AUTHORS

Amanda H. Meena, Yuji Arai

ABSTRACT

Technetium-99 (99Tc) is a radioactive isotope with a half-life of 2.13 × 105 year. 99Tc is a major radionuclide contaminant of concern for the world. Therefore, detailed understanding of 99Tc environmental chemistry is important for protecting human and ecological health. Here, we review the aqueous geochemistry of 99Tc, focusing on chemical properties and behavior of 99Tc in the hydrosphere and pedosphere. We describe the general chemistry of Tc including coordination chemistry, isotope chemistry and solid-state chemistry. Then we present anthropogenic and indigenous sources of 99Tc and their environmental distribution. We also discuss the radiotoxicity of 99Tc and the use of 99Tc for medical purpose. Tc biogeochemistry is described through sorption and desorption reactions at the mineral–water interface, thermodynamic of surface complexation, abiotic and biotic redox reaction of Tc(VII). Finally, we summarize the 99Tc remediation technologies including cement waste forms, natural remediation, vitrification, nuclear waste transmutation. More... »

PAGES

241-263

References to SciGraph publications

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  • 2006-01-01. USE OF ACTIVATED CARBON FOR SOIL BIOREMEDIATION in SOIL AND WATER POLLUTION MONITORING, PROTECTION AND REMEDIATION
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    http://scigraph.springernature.com/pub.10.1007/s10311-017-0605-7

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