The extraction of rare earth elements (REEs) from nitric acid solution with a triphosphine trioxide (TPO) is presented. Performances of such a ligand in ionic liquids vs. a classical solvent (benzyl ether) are compared. TPO seems to be 10 to 100 times more efficient when it is dissolved in ionic media whatever the concentration of nitric acid involved. Mechanistic investigations reveal that cat...

A novel approach for Ta and Nb extraction consisting of the pre-treatment a coltan-bearing ore with an ammonium bifluoride sub-molten salt subsequent acid leaching has been studied. The effects from granulometry, (ABF) to mass ratio, temperature duration fluorination on degree were examined. ABF ratio process found have most pronounced impact efficiency. following optimal conditions determined:...

Fluorspar, also known as fluorite, is commonly used a raw material to produce fluorinated chemicals (e.g., hydrofluoric acid) or flux lower the melting temperature in steel production. In present study, process was developed fluorite concentrate from rare earth element (REE) bearing carbonatite. After an initial flotation step remove gangue minerals REE-bearing minerals, magnetic separation app...

The influence of microwave heating on the leaching kinetics of chalcopyrite and sphalerite has been investigated. Chalcopyrite is inert to many leaching agents, especially ferric ion media. This mineral is considered to be one of the largest sources of copper, in terms of the scale of availability, and copper is usually extracted by pyrometallurgical processes. However, there has recently been ...

Background: Exposure to ionizing radiation results in genotoxicity and the unrepaired lesions in cellular DNA results in cell cycle arrest, reproductive death, interphase death, division delay, chromosome aberrations, mutations, etc. leading to the intensive destruction of cells and violation of their proliferative capacity there by adversely affecting the mammalian system. Since ionizing radia...

The roots of Flemingia strobilifera were extracted in absolute methanol to determine their analgesic activity. The analgesic activity was assessed on intact mice by tail flick latency in tail immersion method. Acetylsalicylic acid in the dose of 300 mg/kg is used as standard drug. Plant extracts were given in the doses of 300, 500 and 1000 mg/kg. Control group received 0.9% NaCl (saline) soluti...