An acute whole-sediment toxicity test with a benthic marine microalga was developed and optimized using flow cytometry to distinguish algae (based on their chlorophyll a autofluorescence) from sediment particles. Of seven benthic marine algae screened, the diatom Entomoneis cf punctulata was most suitable because of its tolerance of a wide range of water and sediment physicochemical parameters,...

The governance of uranium tailings aims to improve stability and reduce radionuclide release. In order achieve this goal, the removal solution test grouting were successively carried out using microbially induced calcium carbonate precipitation (MICP) technology. effect MICP on reinforcement synchronous control in discussed. results show that Sporosarcina pasteurii could grow reproduce rapidly ...

The particle size and content of tailings are important parameters affecting the rheological properties slurry. To explore their influence law mechanism on properties, experiments slurry were designed carried out under different sizes conditions. quantified in paper. Bingham body model was used texperiment. “double 30” theory (“particle 30.0 μm” “content 30%“) proposed expounded. corresponding ...

The cost of cyanide consumption and destruction can be a significant percentage of total operating costs on a gold plant, and unlike other operating costs, yields no economic “return”. The choice of the best strategy for handling cyanide in the tailings can therefore have a major influence on the economic health of a project. The economic impact of cyanide is different in every operation, but i...

Abstract: Complex layered structures of tailings ponds and their vertical and horizontal flow conditions for the pore water require to overcome the 1 dimensional modeling of the consolidation process. A two-dimensional radial symmetric numerical model (Consol2D) based on a fully three-dimensional approach is introduced and practical results are discussed. Special attention is given to the valid...

We investigated the effects of Fe-mining tailings Fundão dam on water quality, concerning physical and chemical parameters, aiming to infer recovery process affected areas, prospects quality in coming years. Water data from Gualaxo do Norte Carmo rivers were evaluated three moments: (i) before rupture (1999–2000), (ii) 1 year after (2016), (iii) implementation recover mitigation activities (201...