Geothermal solid wastes such as scale and sludge from the Philippines and Mexico containing Cu, Zn, and Pb at levels above earth's crustal abundance were studied for their acidification potential if disposed in a landfill. A batch reactor technique using the iron and sulfur oxidizing bacteria ThiobaciZlus ferrooxidans was developed for geothermal wastes to predict their acid mine drainage and b...

Sam Singer In their essay in October’s PLoS Medicine, Daniel Reidpath and Kit Yee Chan challenge the widely cited link between HIV-related stigma and the spread of the epidemic [1]. This is an important question, given the heavy emphasis on stigma in policies of the World Health Organization, the Joint United Programme on HIV/AIDS, and other public health institutions, but in making their argum...

The metal mining industry faces many large challenges in future years, among which is the increasing need to process low-grade ores as accessible higher grade ores become depleted. This is against a backdrop of increasing global demands for base and precious metals, and rare earth elements. Typically about 99% of solid material hauled to, and ground at, the land surface currently ends up as was...

The biosorption process of a lypophilised cell suspension of Aspergillus niger was studied for selenite ( − 2 3 SeO ) removal from acid mine drainage in the Sarcheshmeh porphyry copper mine. The biomass was first characterised by the potentiometric titration, and the major ionic content was evaluated. The experimental data suggest that the biomass cell wall contains two main acidic groups with ...

Mine drainage is an important environmental disturbance that affects the chemical and biological components in natural resources. However, little is known about the effects of neutral mine drainage on the soil bacteria community. Here, a high-throughput 16S rDNA pyrosequencing approach was used to evaluate differences in composition, structure, and diversity of bacteria communities in samples f...