Samples of a naturally bioreduced, U-contaminated alluvial sediment were characterized with various microscopic and spectroscopic techniques and wet chemical extraction methods. The objective was to investigate U association and interaction with minerals of the sediment. Bioreduced sediment comprises approximately 10% of an alluvial aquifer adjacent to the Colorado River, in Rifle, CO, that was...

Many materials have been explored as potential hydrogen evolution reaction (HER) electrocatalysts to generate clean hydrogen fuel via water electrolysis, but none so far compete with the highly efficient and stable (but cost prohibitive) noble metals. Similarly, noble metals often excel as electrocatalytic counter electrode materials in regenerative liquid-junction photoelectrochemical solar ce...

We present a new selenium (Se) map of Japan in more detail than in our previous report (J. Health Sci., 42, 360–366). It contains 150 measured points, especially in the northeast of Japan. In the new sampling points, we did not find high Se levels and most of the measurements were generally at values below 1 mg/ kg. In the Se map of Japan, there are two particularly high measurements, at Mt. Za...

The Mangbang Formation in the Hanbazhai area is part of uranium ore field Longchuanjiang Basin, China. Uraniferous sandstones from this formation are examined study. type and mode occurrence investigated detail using an experiment for sequential extraction uranium, as well electron probe, scanning microscopy, energy spectrum analyses. indicates that proportion minerals significantly greater tha...

Pyrite, as a characteristic mineral in organic-rich marine shale, is significant index for the interpretation of paleoredox conditions. In this study, based on drilling cores and focused ion beam-scanning electron microscopy (FIB-SEM), occurrence, diameter particle size distribution pyrites from 32 samples obtained Wufeng–Longmaxi Formation southeast Sichuan Basin were analyzed. The results sho...

Iron disulfide (FeS2) is attractive as a positive electrode material in lithium batteries because of its low material cost, environmental non-toxicity, and high specific energy density. Furthermore, natural pyrite is a secondary product of the mining extraction of coal. For these reasons, natural and synthetic pyrites have been proposed as active cathode materials in secondary lithium batteries...