File:Radioactivité de la bauxite Hongrie RadioactivityMagyar.jpg

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English: Graph comparing the natural radioactivity (gamma radioactivity, in Bq x kg-1) extracted from bauxite in Hungary (average radioactivity of the ore, and that, naturally radioactive ore from the Hungarian Csordakút). During the process of extracting alumina, these radionuclides are concentrated in the waste metal aluminum companies called "red mud" which can be slightly more radioactive than the ore iself; These data come from the international INTAILRISK project (Assessment of Environmental Risk of radioactively contaminé industrial tailings), financed by Europe, which also looked at the radioactivity of coal ash and slag (also more or less according to their radioactive sources and which were also stored in big open tanks as sludge ) These measures have focused on four radionuclides: Ac-228 (natural isotope of the actinium, which is a product of the decay chain of uranium 235. It is highly radioactive; 150 times greater than that of radium.) Pa-234m (an isotope of the Protactinium), Bi-214 (Bismuth 214, which is radioactive but also toxic) and K-40 (Potassium 40, natural isotope of potassium, highly bioavailable via certain plants. Its half-life is 1.248 billion years)
Français : Graphique comparant la radioactivité naturelle (radioactivité gamma, en Bq x kg-1) de la bauxite extraite en Hongrie (radioactivité d'un minerai moyen, et celle, naturellement plus radioactive provenant du gisement hongrois de Csordakút). Lors du process d'extraction de l'alumine, ces radionucléides sont concentrés dans le déchet métallurgique aluminier dit "boue rouge" qui peut donc être légèrement plus radioactif que le minerai; Ces données proviennent de l'étude internationale INTAILRISK (Assessment of environmental risk of radioactively contaminated industrial tailings), financée par l'Europe, qui s'est aussi intéressée à la radioactivité des cendres et scories de charbons (également plus ou moins radioactives selon leurs origines et qui ont aussi été stockées dans des bassins sous forme de boue); Ces mesures ont porté sur 4 radionucléides : Ac-228 (isotope naturel de l'actinium qui est un produit de la chaîne de désintégration de l'uranium 235. Il est très radioactif ; 150 fois supérieure à celle du radium.); Pa-234m (un des isotopes du Protactinium) ; Bi-214 (Bismuth 214, qui est radioactif, mais également toxique) et K-40 (Potassium 40, Isotope naturel du Potassium, très bioassimilable via certaines plantes. Sa période radioactive est de 1,248 milliards d'années)
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Author Lamiot

Pour en savoir plus sur la place de ces radionucléides dans la chaîne de désintégration
INTAILRISK (Assessment of environmental risk of radioactively contaminated industrial tailings) archive copy at the Wayback Machine, (Page d'accueil du projet archive copy at the Wayback Machine)consulté 2010/10/16

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current08:03, 17 October 2010Thumbnail for version as of 08:03, 17 October 20101,010 × 666 (125 KB)Lamiot (talk | contribs){{Information |Description={{en|1=Graph comparing the natural radioactivity (gamma radioactivity, in Bq x kg<sup>-1</sup>) extracted from bauxite in Hungary (average radioactivity of the ore, and that, naturally radioactive ore from the Hungarian Csordak�

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