Good control of the solution pH and temperature is required to recover vanadium from water leaching ore after sodium roasting. However, such adjustments could lead aluminum-vanadium sodium-vanadium co-precipitation, which greatly affects efficiency recovery. In this study, a process that can increase recovery as ammonium metavanadate [NH4VO3] polyvanadate [(NH4)2V6O16·H2O] was investigated by e...

V-doped TiO2 materials (0.01, 0.05, 0.10, and 1.00 nominal atomic %) were synthesized by the sol-gel method characterized X-ray diffraction, Raman spectroscopy, UV–visible diffuse reflectance N2 adsorption–desorption isotherms, photoelectron H2-temperature programmed reduction. Two vanadium precursors (vanadyl acetylacetonate ammonium metavanadate) three calcination temperatures (400, 500, 600 ...

Vanadium biological studies often disregarded the formation of decameric vanadate species known to interact, in vitro, with high-affinity with many proteins such as myosin and sarcoplasmic reticulum calcium pump and also to inhibit these biochemical systems involved in energy transduction. Moreover, very few in vivo animal studies involving vanadium consider the contribution of decavanadate to ...

Photocatalytic H2O2 production is an innovative on-site synthesis method to treat organic pollutants through Fenton-like reactions, avoiding the need and potential liability of storage transportation. Accurate quantification crucial explore mechanism photocatalytic optimize reaction parameters. In this work, three common methods (i.e., titration with potassium permanganate (KMnO4), colorimetry ...

New forms of vanadium oxide Nanoporous were fabricated using a simple chemical synthesis method. Vanadium pentoxide (V2O5) Nanoporous were synthesized by sodium metavanadate as precursor and ethylene glycol as surfactant. The samples were characterized by high resolution transmission electron microscopy (HRTEM), field effect scanning electron microscopy (FESEM) and X-ray diffraction (XRD), Four...

Hydroponic experiments were conducted to investigate vanadium uptake by Chinese green mustard and tomato plants and its effect on their growth. Twenty-eight (Chinese green mustard) and 79 days (tomato) after germination, the plants were exposed for a further seven days to a solution containing six different concentrations of ammonium metavanadate (0-80 mg/l NH4VO3). The vanadium accumulated in ...