Halides

Abstract. The thermally evaporated stoichiometric CdI2 films show good c-axis alignment normal to substrate plane for film thickness up to 200 nm. The optical absorption data indicate an allowed direct interband transi-tion across a gap of 3×6 eV in confirmation with earlier band structure calculations. However, part of the absorption data near band edge can be fitted to an indirect band gap of 3 eV. The dependence of band gap on film thickness (> 200 nm) can be explained qualitatively in terms of decreasing grain boundary barrier height with grain size.

This invention describes a chemical process for desulfurizing coal, especially adaptable to the treatment of coal-water slurries, at temperatures as low as ambient, comprising treating the coal with aqueous titanous chloride whereby hydrogen sulfide is liberated and the desulfurized coal is separated with the conversion of titanous chloride to titanium oxides.

... is more effective than the OM of the soil (Boyd et al., 1988a, Lee et al., 1989 and Sánchez-Camazano and Sánchez-Martin, 1994). ... et al., 2000 and Lagaly, 2001), the removal of pesticides from water (Hermosin and Cornejo, 1992, Borisover et al., 2001 and Groisman et ...

Résumé/Abstract Wadi Zerka Ma'in catchment area is located in the northeast of the Dead Sea basin. It has two different types of aquifers:(1) an unconfined upper limestone aquifer with groundwater level ranges between 800 and 160 m above sea level (asl), and (2) a confined lower sandstone aquifer with groundwater level ranges between 340 and―260 m asl. The two aquifers are separated by a marly aquiclude. The salinity in the carbonate aquifer ranges from 500 to 1500 μS cm―1, while the salinity in the sandstone aquifer is ...

... a Département de géologie, faculté des sciences, Dhar El Mahrez, BP 1796, 30000 Fès-Atlas, Maroc. ... suggèrent, pour leur part, que les saumures impliquées dans la genèse des minéralisations sulfurées proviendraient principalement de l'évaporation de l'eau de mer et, à un ...