Leaching procedure, static

Price, W.A., Morin, K.A., Hutt, N.M. 1997. Guidelines for the prediction of acid rock drainage and metal leaching for mines in British Columbia Part II. Recommended procedures for static and kinetic testing. In Proceedings of the 4th International Conference on Acid Rock Drainage. Vancouver, I, 15-30. 

Two leach test procedures were used a modified IAEA dynamic leach test and a static leach test. In the former test the leachant was gently agitated on a mechanical shaker and was changed at selected intervals. A typical sampling schedule was three times daily for the first week, twice per day for week 2, once per day for weeks 3 through 5, and once per week through week 9. 

Strontium ratios were analysed on a multicollector Finnigan MAT262 mass spectrometer in static mode using W filaments. Analytical uncertainty (2ct), based on the reproducibility of analyses of the international standard NBS987, is 0.00002. Pure sqiarates of siderite and ankerite were totally dissolved in 1 N HCl. Calcite was dissolved from whole-rock powders by leaching in 0.2 N HCl. This procedure was verified to not leach strontium from silicates. Pure calcite extracted (by heavy liquids)... 

Development and Harmonization of Leaching Test Procedures From a practical point of view, leaching test procedures can be classified into static, dynamic and diffusion tests, and there are special concepts related to the long-term prognosis of metal release from waste materials ... 

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