Trichloroethylene dechlorination rates, pathways, and efficiencies of ZVMg/C in aqueous solution.

The removal mechanism from the reductive dechlorination of trichloroethylene (TCE) by zero valent magnesium (ZVMg) in aqueous solution is systematically studied. Following the preparation and characterization of ball-milled micro ZVMg with graphite (ZVMg/C) particles, this paper evaluated the TCE reaction rates, pathways, utilization rates and aging effects of ZVMg/C particles in aqueous solution under uncontrolled pH conditions. Overall, 38 μM of TCE was transformed by 10 g/L of ZVMg/C to methane (62.

Inhibition mechanism of Ca, Mg and Fe in fine cassiterite flotation using octanohydroxamic acid.

The existence of metal ions should not be ignored in both hydrometallurgy and flotation. In this study, the effects of Ca, Mg and Fe on the flotation performance of cassiterite using octanohydroxamic acid (OHA) as the collector were investigated by micro-flotation tests, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, contact angle, zeta () potential measurements and atomic force microscopy (AFM) imaging. The results of the flotation and contact angle experiments showed that the addition of Ca, Mg and Fe significantly decreased both the recovery and contact angle of cassiterite with pH ranged from 6.