| 摘要 |
<p>The present invention describes a method for measuring the intrinsic oxidation rate of a sample wherein a sample of material is placed in a closable sealable enclosure, the enclosure is closed and sealed, and a first gas pressure is measured in the enclosure. The internal volume of the enclosure is then changed by a known volume and a second gas pressure is measured in the enclosure after said changing as a function of time. It is then determined from said second gas pressure as a function of time whether there is a gas leak from or into said enclosure. Where there is no gas leak, the internal gas volume of the enclosure is determined from the first and second gas pressures and the known volume. The porosity of the sample may then determined from the volume of gas in the enclosure, the volume of the enclosure and the volume occupied by the sample. A change in gaseous oxygen mass in the enclosure is then determined as a function of time and the intrinsic oxidation rate of the sample determined. The invention further describes methods for determining the intrinsic oxidation rate of a plurality of samples, and for determining a spatial distribution of intrinsic oxidation rate within a waste heap, as well as systems for performing the methods of the invention.</p> |
