Sentence examples for these tailings from inspiring English sources

These tailings are not just a harmless inconvenience; they often contain poisonous heavy metals such as arsenic, cadmium and lead.

Containing 1% to 2% of calcium chromate (a carcinogen) and 0.5% to 1% of water-soluble hexavalent chromium (a deadly poison), these tailings are toxic.

The removal of these tailings is often impractical due to their large volumes.

These tailings usually contain high heavy metal concentrations and have low fertility.

In our opinion, a monitoring program of these tailings impoundments would be helpful to continue, even after greening completion.

This complicates the management, and the proper closure of these tailings ponds has been an economic burden to the nation.

Disposal of these waste tailings are very essential as it destroys the ecological environment.

Aeolian transport of particulate matter from these mine tailings impoundments are potential hazards to human health due to the presence of metal and metalloid contaminants.

Two of these mine tailings had pH values between 6 and 7, while the other was acidic, with a pH of 2.5.

Based on these considerations tailings from all impoundments were classified as belonging to group 3 of high contamination risk for soil, those of Saliste, Gura Rosiei, Cutii, Sartas and Brazesti because of As, while those of Stefanca and Sesei because of Cu.

For these reasons, tailings remain without normal soil structure and support a severely stressed heterotrophic microbial community (Mendez et al. 2007; Southam and Beveridge 1992).