Vanadium can be an important contaminant in groundwaters impacted by mining activities. In order to determine if microorganisms of the Geobacteraceae, the predominant dissimilatory metal reducers in many subsurface environments, were capable of reducing vanadium(V), Geobacter metallireducens was inoculated into a medium in which acetate was the electron donor and vanadium(V) was the sole electr...

Catalyst can enhance the reduction effect and promote of vanadium titanomagnetite. In this paper, carbon-containing pellets titanomagnetite were prepared by using highly volatile coal as reducing agent under background a novel process pre-reduction in rotary kiln. The effects CaO, CaCO 3 , B 2 O borax (Na 4 7 ·10H O) on tail gas characteristics prereduction studied simulated kiln flue analyzer....

Heterogeneous catalysis plays a key role in the manufacture of essential products in key areas of agriculture and pharmaceuticals, but also in the production of polymers and numerous essential materials. Our understanding of heterogeneous catalysts is advancing rapidly, especially by using the latest characterisation methods on these relatively complex effect materials. At the heart of these ca...

Supported transition metal oxides and vanadium-containing multi-metallic oxides were investigated to develop new catalysts for the catalytic destruction of highly toxic polychlorinated aromatic pollutants such as polychlorinated benzenes, polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), and/or biphenyls (PCBs) from waste gases. The decomposition of 1,2-dichlorobenzene (Cl2Bz) w...

By nonenzymatic model reactions, the influence o f vanadium (V 0 2+, V 0 3~) and other metal ions (A l3+, Fe2+, Fe3+, Zn2+, N i2+, Cr3+) on the transamination of 4,5-dioxovaleric acid (D O VA) with L-alanine (A la ) to 6 -aminolevulinic acid (<5-ALA) and pyruvic acid (P A ) with pyridoxal phosphate (P L P ) is investigated. The examinations o f the partial reactions show that V 0 2+, V 0 3~ and...

When using heteropolycompounds in the selective oxidation of isobutane to methacrolein and methacrylic acid, both the keeping of the primary structure (Keggin units) and the presence of acidic sites are necessary to obtain the desired products. The structural evolution of supported (NH4)3HPMo11VO40 (APMV) catalysts under preliminary thermal oxidizing and reducing treatments was investigated. Va...

The new highly active supported vanadium-magnesium catalyst (VMC) has been studied in α-olefin (1-butene, 1-hexene)/ ethylene copolymerization in the presence of hydrogen. Data on the effect of α-olefin/ethylene ratio in copolymerization on the content of branchings in copolymers, kinetic profile, copolymer yield, molecular weight and molecular weight distribution of copolymers have been obtain...

Vanadium is a transitional metal with an ability to generate reactive oxygen species in the biological system. This work was designed to assess memory deficits in mice chronically exposed to vanadium. A total of 132 male BALB/c mice (4 weeks old) were used for the experiment and were divided into three major groups of vanadium treated, matched controls, and animals exposed to vanadium for three...