Improved acid neutralisation capacity assessment of iron carbonates by titration and theoretical calculation

pHstatvs. single extraction tests to evaluate heavy metals and arsenic leachability in environmental samples

“…kg −1 ) are among the highest reported. The negative value observed for the pyritic sludge, and the low values obtained for RIB and ORG soils indicate the acidic character of the samples (presence of pyritic sludge and absence of carbonates in the RIB soil; high content of organic acids in the ORG soil) and may mask ANC available in the sample [23].…”

Static tests response on 5 Canadian hard rock mine tailings with low net acid-generating potentials

“…Jambor et al, 2002Jambor et al, , 2007Li, 2000;Sherlock et al, 1995), the effect of iron-bearing carbonates on NP determination and methods to account for the presence of iron within neutralizing minerals (Bennett et al, 2000;Frostad et al, 2003;Jambor et al, 2003;Lapakko, 1994b;Malmström et al, 2000;Paktunc, 1999a;1999b;Weber et al, 2004). Additionally there has been considerable interest in static test result extrapolation from the lab to the field (Bethum et al, 1997;Feasby et al, 2001;Frostad et al, 2000;Lapakko, 1994b;Liao et al, 2007;Miller et al, 2003).…”

“…Many static prediction techniques are available to evaluate the acid-generating potential of mine tailings (Adam et al, 1997;Day, 1991;Duncan and Bruynesteyn, 1979;Lapakko, 1994a;Wang, 1996, 1997;Lawrence et al, 1989;Skousen et al, 2002;Sobek et al, 1978;Weber et al, 2004Weber et al, , 2005. These procedures generally estimate the global acid-generating (AP) and acid-neutralizing (NP) potentials and are often called acid-base accounting (ABA) tests (Lawrence and Wang, 1996).…”

Physical chemical characterization of historical mining waste and ARD prediction tests

“…[7] Static tests are geochemical analyses of sulfidic waste which are used to predict potential of waste sample to produce acid. Details on these tests are documented in the literature [8][9][10][11][12][13][14][15][16].…”