Basalts from the East Pacific Rise (EPR), Siqueiros transform zone and Mid-Atlantic Ridge (MAR) area have been analyzed for platinum-group elements (PGE) a wide range of incompatible elements. The low PGE content most primitive mid-ocean ridge basalts (MORB) suggests that they leave mantle sulfide-saturated but become sulfide under-saturated, as consequence decompression, during their ascent to...

Protein fibers, including wool selectively adsorb precious-metal ions; hence, they can potentially be used in wastewater treatment applications. Herein, we examined metal-ion adsorption by woven fabric and resins, especially the of Pd(II). When fabrics are treated with chlorine, cuticle layer is removed from fiber surface; this showed superior Pd(II)-adsorption performance compared untreated fa...

The mechanism responsible for the irreversible deactivation of ceria-supported precious metals for the watergas-shift reaction has been investigated through accelerated aging tests. It is shown that deactivation of Pd/ ceria occurs more rapidly at 673 K compared to 523 K when operating with an integral reactor in 25 torr each of CO and H2O. By heating a fresh catalyst in H2, H2O, CO, or CO2, it...