Localisation of uranium in roots by chemical extractions and by a short term uptake study. Influence of phosphate.

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Abstract

Pea roots were exposed to nutrient solution containing 25 µmol L-1 of uranium in presence or absence of phosphate. The uptake of U was followed during the first 90 minutes of exposure. Fifty percent of the uranium was removed after 45 minutes and after between 60-90 minutes in absence and in presence of phosphate respectively. After 24 hours exposure, root were extracted, to remove uranium from the root apoplasm. Copper extracted similar amounts of uranium than EDTA for root exposed to a solution with phospate while copper extracted only 18% of uranium extracted by EDTA for root exposed to a solution devoid of phosphate. Phosphate decreased the availability of uranium to roots of pea. The presence of phosphate decreased also the amounts of uranium extracted.

Details

Original languageEnglish
Title of host publicationUranium in the environment - Mining impact and consequences
Place of PublicationFreiberg, Germany
Pages525-530
Publication statusPublished - 15 Sep 2005
EventUMH IV 2005 - Uranium Mining and Hydrogeology congress - Freiberg, Germany
Duration: 11 Sep 200516 Sep 2005

Conference

ConferenceUMH IV 2005 - Uranium Mining and Hydrogeology congress
CountryGermany
CityFreiberg
Period2005-09-112005-09-16

Keywords

  • adsorption, chemical extraction, phosphate, precipiration, roots, uranium

ID: 167883