For the tests the CVD was retrofitted during normal operation on the flotation tailings stream.
The use of diluent, along with incomplete bitumen and solvent recovery from the tailings stream, leads to the accumulation of organic compounds within tailings ponds.
An improved, integrated approach to tailings management and AMD mitigation is proposed, whereby conventional tailings are separated with the use of flotation into a largely benign tailings stream and a sulfide-rich product.
If mining companies in the U.S., where there is at least some measure of environmental protection, can remove mountaintops and dump the tailings into trout streams, think what will happen in Afghanistan where there is virtually no governmental authority beyond the walls of the Arg Palace in Kabul.
An isolated population of fewer than 50 grizzlies lives in the remote mountain range, they say, and a protected fish, the bull trout, lives in the streams where tailings water from the mine would be discharged.
The administration's desire is for the Supreme Court to allow the mining industry the right to dump mine tailings into rivers, lakes and streams.
To assess the potential environmental contamination in this region, the authors measured the concentration of Cu, As, Cd, Zn and Hg in samples of stream and mine waters, stream sediments, soils, flotation tailings, and mine wastes in the Andacollo (Cu, Au, Hg) and Punitaqui (Cu Au, Hg) districts.
Layered structures of coarse and fine particles (usually called lenticles), which are often found in dam tailings that were built using the up-stream method, significantly impact the stability of a dam.
The word 'dirty' has been derived from the fact that most current extraction processes use hot water or steam, which results in an oily water stream that leaves behind toxic tailings ponds.
The waste stream is known as mature fine tailings (MFT) because it achieves about 30% solids (by weight) within a couple of years.
