2 results for group: mineral-tailings


Carbonate precipitation in artificial soils as a sink for atmospheric carbon dioxide

Turnover of C in soils is the dominant flux in the global C cycle and is responsible for transporting 20 times the quantity of anthropogenic emissions each year. This paper investigates the potential for soils to be modified with Ca-rich materials (e.g. demolition waste or basic slag) to capture some of the transferred C as geologically stable CaCO3. To test this principal, artificial soil known to contain Ca-rich minerals (Ca silicates and portlandite) was analysed from two sites across NE England, UK. The results demonstrate an average C content of 30 ± 15.3 Kg C m−2 stored as CaCO3, which is three times the expected organic C ...

Use of Emerald Mining Tailings From the Esmeraldifera Province Between Itabira and Nova Era – MG, As a Supplier of Nutrients to Agricultural Soils

Abstract Two experiments were conducted in a laboratory with incubation of mineral tailings formed predominantly by emerald-biotite-amphibole-mica quartz schist on soil with and without plants. The first experiment evaluated the release of exchangeable Mg+2, Ca+2 and K+, change in pH, soil aluminum saturation and soil base saturation. The methodology used was to incubate 0, 1, 2, 4, 8, 12, 16, 20, 40 t/ha of tailings for 60 days. The second experiment evaluated the dry matter production of hybrid corn for doses, used in the form of rock dust, of 0, 5, 10, 20, 40 t/ha. A completely randomized design was used with four replications in the first and ...