Graphite tailings were used as the raw materials for preparation of foamed ceramics via a high-temperature self-foaming method. The residual carbon in acted foaming agent and no additional agents required. reacted with Fe2O3 produced gas that was wrapped by liquid phase to form porous structure. effects sintering temperature, holding time, content, flux on bulk density, water absorption, mean p...

The determination of physical and mechanical properties bauxite residue plays an important role on the stability assessment tailing disposal dams. This paper studies composition, properties, shear strength, bearing capacity by laboratory field in-situ tests. near discharge point are mainly coarse particles, size particle far away from reservoir shows a decreasing trend. Through X-ray diffractio...

This paper investigates the impact of service quality in e-tailing on site visits and consumer demand (approximated by the last-clickthrough concept). We use a large representative data set obtained from a price-comparison site which covers most of the national (Austrian) market on e-tailing. Customers’ valuations for a broad range of 15 different service characteristics are condensed by factor...

electrokinetic remediation is one of the most promising in situ or ex situ processes for decontamination of heavy metals, anions and polar organic compositions from the soil. in this study, we investigated the efficacy of this method in removing mercury from clayey soil (with kaolin to sand weight ratio of 2:1) and from gold mine tailing dam sediment and determined optimum removal conditions. t...

Abstract The massive annual tonnage of iron ore tailings, plus the more demanding environmental policies after catastrophic collapses Fundão Dam in 2015 and Feijão I 2019, have forced Brazilian mining companies to search for sustainable safer alternatives tailings disposal. industry has been studying dry stacking filtered tailings. Most seek development great stacks, over 200 m high, absorb who...

Moloney murine leukemia virus reverse transcriptase (MMLV-RT) is a widely used enzyme for cDNA synthesis. Here we show that MMLV-RT has a strong template-independent polymerase activity using blunt DNA ends as substrate that generates 3' overhangs of A, C, G, or T. Nucleotides were appended efficiently in the order A > G > T > C, and tail lengths varied from 4 to 5, 2 to 7, 2 to 4, and 2 to 3 f...