ALS Kinetic AMD Testing Options
This EnviroMail™ presents an alternative option to AMIRA (2002) free draining column method as a means of evaluating drainage chemistry (EnviroMail™ No. 33). The concept and use of humidity cells has been extensive in North America and projects located in high humidity and wet climatic environments e.g. PNG. ALS in North America have provided this service routinely to mines and consultants. Using the expertise in North America, ALS now offers this service in Australia.
Brief Overview of Humidity Cell Procedure
One kilogram of sample is placed in the humidity cell and is wetted/flushed. Each humidity cell (HC) receives repetitive weekly cycles of 3 days dry air pumped continuously through the cell, then 3 days of humid/moist air and on the final day is flushed with 500ml of distilled/deionised water. The leachate is collected, filtered if required and analysed in the laboratory.