Review of uncertainty in the collection and interpretation of leaching data

Abstract The literature on the determination of mechanisms of mineral leaching reactions is reviewed to identify the sources of uncertainty about the conclusions drawn. Uncertainty about the mechanism of a system arises in the measurement, data processing and decision-making stages. There is uncertainty in the accuracy, validity and adequacy of the data collected. The effects of most of more than 30 variables and phenomena are seldom determined. There is less certainty in tests of model equations against the rate data than is commonly accepted. Approximate calculations of the absolute rate of mass transport in a system could be the basis of a better test of a mechanism. There could be more direct tests of the basic premises and subsidiary assumptions of preferred mechanisms. References are given to illustrate good practices and achievements in reducing the uncertainty.