Éditeur(s) : HAL CCSD MDPI
Résumé : International audience
AbstractThis review provides a global overview of microporous silica based membranes for desalination via pervaporation with a focus on membrane synthesis and processing, transport mechanisms and current state of the art membrane performance. Most importantly, the recent development and novel concepts for improving the hydro-stability and separating performance of silica membranes for desalination are critically examined. Research into silica based membranes for desalination has focussed on three primary methods for improving the hydro-stability. These include incorporating carbon templates into the microporous silica both as surfactants and hybrid organic-inorganic structures and incorporation of metal oxide nanoparticles into the silica matrix. The literature examined identified that only metal oxide silica membranes have demonstrated high salt rejections under a variety of feed concentrations, reasonable fluxes and unaltered performance over long-term operation. As this is an embryonic field of research several target areas for researchers were discussed including further improvement of the membrane materials, but also regarding the necessity of integrating waste or solar heat sources into the final process design to ensure cost competitiveness with conventional reverse osmosis processes. © 2012 by the authors.
ISSN: 2073-4441

hal-01683200
https://hal.univ-antilles.fr/hal-01683200
DOI : 10.3390/w4030629

Éditeur(s) : HAL CCSD RSC Publishing
Résumé : International audience
Abstract View references (36)The size or alkyl chain length of cationic surfactants can be used to tailor both the pore morphology and the functionality or oxidation state of cobalt in silica materials. This work shows for the first time that these two mechanisms are interconnected. Cobalt oxide silica materials, with the same cobalt loading (Co:Si = 1:4), were prepared using an acid catalysed sol-gel method where the cobalt/surfactant ratio was systematically varied. The alkyl chain length of the cationic surfactant was also varied from 2 to 12 by using tetraethyl (C2-AB) ammonium bromide, and triethyl hexyl (C6-AB) and dodecyl trimethyl (C12-AB) ammonium bromides as the templating agents. Initial addition of C2-AB, C6-AB or C12-AB enhanced the oxidation of cobalt to cobalt (ii,iii) oxide in the xerogels. However, as more surfactant is added the enhancement effect is reversed and the cobalt (ii,iii) oxide content of the sample begins to decline. The point at which this transition occurs is a function of the alkyl chain length of the surfactant, with a longer chain indicating an earlier transition. Pore morphology was influenced in a similar fashion with the longer alkyl chain C12-AB surfactant undergoing an earlier transition (i.e. at lower concentrations) towards mesoporosity, than either of the smaller C2-AB and C6-AB surfactants. In both mechanisms it was the increased propensity of the C12-AB surfactant to aggregate (given its larger size and lower solubility) that was the controlling factor. This journal is © the Partner Organisations 2014.
EISSN: 2046-2069

hal-01683205
https://hal.univ-antilles.fr/hal-01683205
DOI : 10.1039/c4ra05934d

Éditeur(s) : Paris : Imprimerie de Didot jeune
Résumé : 2 vol. in-8°. Contient : Aux manes du marquis de Chauvelin ; Le temple de Gnide ; Les Saisons ; Héro et Léandre ; Idylles ; Poésies diverses
Siècle(s) traité(s) : 18
Droits : Domaine public
Provenance : Archives départementales de Guadeloupe
Permalien : http://www.manioc.org/patrimon/ADG17010
ADG17010

Éditeur(s) : Paris : Librairie Cocheris
Résumé : "Relié avec "Quelques souvenirs, ou notes fidèles sur mon service au temple : depuis le 8 décembre 1792 jusqu'au 26 mars 1793 et sur quelques faits relatifs au procès de la Reine et à celui des membres de la commune accusés de conspiration avec la famille royale" et "Journal de l'adjudant-général Ramel, commandant de la garde du corps législatif de la république Française, l'un des déportés a la Guiane après le 18 fructidor.""
Siècle(s) traité(s) : 18
Droits : Domaine public
Provenance : Evêché de Guyane
Permalien : http://www.manioc.org/patrimon/FRA11134a
FRA11134a

Éditeur(s) : Londres : [s.n.]
Résumé : Relié avec "Quelques souvenirs, ou notes fidèles sur mon service au temple : depuis le 8 décembre 1792 jusqu'au 26 mars 1793 et sur quelques faits relatifs au procès de la Reine et à celui des membres de la commune accusés de conspiration avec la famille royale" et "Défense des émigrés français, adressée au peuple français"
Seconde édition
Siècle(s) traité(s) : 18
Droits : Domaine public
Provenance : Evêché de Guyane
Permalien : http://www.manioc.org/patrimon/FRA11134b
FRA11134b