Standard Test Method for Shake Extraction of Mining Waste by the Synthetic Precipitation Leaching Procedure

Importancia y uso:

4.1 This test method is intended as a means for obtaining an extract of mining waste. The extract may be used to estimate the release of certain inorganic constituents of the waste under the laboratory conditions described in this test method. The user is advised to minimize the holding time between sampling and testing if the waste is suspected to contain reactive sulfide minerals.

Note 3: This method is not intended to be used as a kinetic test to simulate weathering of mining wastes. For kinetic testing of mining wastes, refer to Test Method D5744 to determine release rates for constituents of interest. For static testing of metal mining ore and mining or mineral processing waste materials, refer to Test Methods E1915.

4.2 The pH of the extraction fluid used in this test method is to reflect the pH of acidic precipitation in the geographic region in which the waste being tested is to be disposed (see 1.2).

4.3 An intent of this test method is for the final pH of the extract to reflect the interaction of the extractant with the buffering capacity of the waste.

4.4 This test method is not intended to provide an extract that is representative of the actual leachate produced from a waste in the field or to produce extracts to be used as the sole basis of engineering design. If the conditions of this test method are not suitable for the test material, USEPA Method 1312 or Test Method E2242 may be used.

4.5 This test method has not been demonstrated to simulate actual disposal site leaching conditions.

4.6 This test method produces extracts that are amenable to the determination of both major and minor (trace) inorganic constituents. When minor constituents are being determined, it is especially important that precautions be taken in sample storage and handling to avoid possible contamination of the samples.

4.7 This test method has been tested to determine its applicability to certain inorganic components in the waste. This test method has not been tested for applicability to organic substances, volatile matter (see Note 5), or biologically active samples. This test method has undergone limited testing to determine its reproducibility.

Subcomité:

D34.01.04

Referida por:

D1976-20, D8155-17R23, E2242-21, E1915-20, D8187-18

Volúmen:

11.04

Número ICS:

73.020 (Mining and quarrying)

Palabras clave:

extraction fluids; extracts; leaching procedure; mining waste; shake extraction; SPLP; synthetic precipitation; waste leaching technique;