Long-Term Evolution of Uranium Mobility within Sulfated Mill Tailings in Arid Regions: A Reactive Transport Study

Autor: Nicolas Seigneur, Laurent De Windt, Adrien Déjeant, Vincent Lagneau, Michaël Descostes

Publikováno v: Minerals, Vol 11, Iss 11, p 1201 (2021)

Management of mill tailings is an important part of mining operations that aims at preventing environmental dispersion of contaminants of concern. To this end, geochemical models and reactive transport modeling provide a quantitative assessment of th

Externí odkaz: https://doaj.org/article/ec3a28efe0e34aca8077434d774fcdd3

Calcium isotope constraints on the uptake and sources of Ca2+ in a base-poor forest: A new concept of combining stable (δ44/42Ca) and radiogenic (εCa) signals

Autor: Adrien Déjeant, Juraj Farkas, Stein B. Jacobsen, Martin Novak

Publikováno v: Geochimica et Cosmochimica Acta. 75:7031-7046

Plant-available reserves of major base cations, Ca 2+ and Mg 2+ , decreased markedly in soils over the past century, thus posing a potential threat to forest ecosystem health. Trees are thought to obtain dissolved Ca 2+ ions mainly from an easily acc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::66c6a29b5295e300501d7e8d00a71deb
https://doi.org/10.1016/j.gca.2011.09.021

Field analyses of 238U and 226Ra in two uranium mill tailings piles from Niger using portable HPGe detector

Autor: Michael Descostes, Georges Calas, Adrien Déjeant, Vannapha Phrommavanh, Ludovic Bourva, Laurence Galoisy, Radia Sia

Publikováno v: Journal of Environmental Radioactivity
Journal of Environmental Radioactivity, Elsevier, 2014, 137, pp.105-112. ⟨10.1016/j.jenvrad.2014.06.012⟩
Journal of Environmental Radioactivity, 2014, 137, pp.105-112. ⟨10.1016/j.jenvrad.2014.06.012⟩

International audience; The radioactivities of 238U and 226Ra in mill tailings from the U mines of COMINAK and SOMA€IR in Niger were measured and quantified using a portable High-Purity Germanium (HPGe) detector. The 238U and 226Ra activities were

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb5d786e748c6b5e8e9e205c2da18d4d
https://hal.archives-ouvertes.fr/hal-01054718