Reaction order in Bi-doped oxide glasses depends on the optical basicity of the glass host. Red and NIR photoluminescence (PL) bands result from Bi(2+) and Bin clusters, respectively. Very similar centers are present in Bi- and Pb-doped oxide and chalcogenide glasses. Bi-implanted and Bi melt-doped chalcogenide glasses display new PL bands, indicating that new Bi centers are formed. Bi-related ...

Metal dispersion is key for designing highly active and well-defined catalytic systems. Herein, to shed light on the effects of Nb conversion fructose into HMF, porous silica glasses grafted with niobium oxide were prepared. Preliminary screening was done microwave-assisted 5-hydroxymethylfurfural (HMF) in a biphasic system. The impregnated presented HMF productivities about 10- 20 times higher...

Coastal reclamation has been carried out along the coastal areas near Shenzhen, China in a large scale since 1980s by dumping fill materials over the marine mud at the sea bottom. Usually the area to be reclaimed is drained first and some of the mud is airdried for a few weeks before it is buried by fill. After reclamation, the terrestrial groundwater, which is relatively acidic and with high d...

Heavy metal-tungsten alloys (HMTAs) are dense heavy metal composite materials used primarily in military applications. HMTAs are composed of a mixture of tungsten (91-93%), nickel (3-5%) and either cobalt (2-4%) or iron (2-4%) particles. Like the heavy metal depleted uranium (DU), the use of HMTAs in military munitions could result in their internalization in humans. Limited data exist, however...

Praseodymium (Pr2O3) doped PbO-Ro2O3–WO3–B2O3 glasses were prepared by melt quenching method and their optical absorption emission spectra characterized, for three different heavy metal oxides (Ro2O3 = Sb2O3, Al2O3, Bi2O3). The characteristics of the glass matrix are confirmed X-ray diffraction spectra. Many structural properties can be identified Fourier Transform infrared glasses, such as PbO...

heavy metal pollution all around the world has become a major environmental concern and the bioremediation of polluted environments is an increasingly popular strategy due to both its efficiency and safety. in this study, a bacterial strain resistant to heavy metal was isolated from metal contaminated sites. strain mkh2 was removed pb (ii) with 95.06%. this isolate was also resistant to zinc, c...