A road to India: the example of Eireks saga víðförla

Resumo O artigo analisa a saga islandesa Eireks saga víðförla, explorando as representações literárias da Índia, percebida como uma terra exótica e paradisíaca dentro dos referenciais religiosos do período, refletindo as relações entre política e cristianização da Escandinávia, Leste Europeu e Oriente. Palavras-chave: Sagas islandesas – Explorações escandinavas – Representações do Oriente Abstract The article analyzes the icelandic saga Eireks saga víðförla, exploring the literary representations of India, perceived as an exotic and paradise land within the religious references of the period, reflecting the relationship between politics and the Christianization of Scandinavia, Eastern Europe and the Orient. Keywords: icelandic Sagas – scandinavian Explorations – Representations of the Orien

Hydrophilic sulfonated bis-1,2,4-triazine ligands are highly effective reagents for separating actinides(iii) from lanthanides(iii) via selective formation of aqueous actinide complexes

We report the first examples of hydrophilic 6,6′-bis(1,2,4-triazin-3-yl)-2,2′-bipyridine (BTBP) and 2,9-bis(1,2,4-triazin-3-yl)-1,10-phenanthroline (BTPhen) ligands, and their applications as actinide(III) selective aqueous complexing agents. The combination of a hydrophobic diamide ligand in the organic phase and a hydrophilic tetrasulfonated bis-triazine ligand in the aqueous phase is able to separate Am(III) from Eu(III) by selective Am(III) complex formation across a range of nitric acid concentrations with very high selectivities, and without the use of buffers. In contrast, disulfonated bis-triazine ligands are unable to separate Am(III) from Eu(III) in this system. The greater ability of the tetrasulfonated ligands to retain Am(III) selectively in the aqueous phase than the corresponding disulfonated ligands appears to be due to the higher aqueous solubilities of the complexes of the tetrasulfonated ligands with Am(III). The selectivities for Am(III) complexation observed with hydrophilic tetrasulfonated bis-triazine ligands are in many cases far higher than those found with the polyaminocarboxylate ligands previously used as actinide-selective complexing agents, and are comparable to those found with the parent hydrophobic bis-triazine ligands. Thus we demonstrate a feasible alternative method to separate actinides from lanthanides than the widely studied approach of selective actinide extraction with hydrophobic bis-1,2,4-triazine ligands such as CyMe4-BTBP and CyMe4-BTPhen

Evaluation of alkali-activated binders suitability for the stabilization/solidification of tunnel boring muds

In Europe, two major civil engineering projects, the “Grand Paris” automatic metro lines and the “Lyon-Turin” high speed railway tunnel, brought forth for the construction industry an unprecedented prerequisite within schemes of this scale: the necessity to recycle all forms of waste that comes out of the excavation process. By 2030, up to 100 million tons of muds retrieved from the boring operations, likely contaminated with sulphate and heavy metals, will have to be dealt with. Please click Additional Files below to see the full abstract

Sur les peroxydes d’éléments transuraniens pentavalents

On a étudié par potentiométrie et spectrophotométrie les réactions entre le peroxyde d’hydrogène et les ions Np (V) en solutions aqueuses. On a montré l’existence de peroxydes solides dont les formules déterminées par analyse chimique sont (NpO1)2OO, NpO2(OO)Na, NpO2(OO)3Na5. La comparaison entre les peroxydes de neptunium (V) et les peroxydes de protactinium (V), niobium (V) ou U (VI) montre que les complexes du neptunium sont plus proches de ceux des ions uranyle (VI). Ils n’en diffèrent que par leur stabilité. Les valeurs des constantes d’équilibre des réactions de complexation sont les suivantes.[math