Table 2.

Dissolution equilibrium for Pb from MWI fly ash as determined by ChemEQL at high sulfate concentrations (50 g of fly ash liter−1; maximum total Pb concentration, 445 mg liter−1; minimum H2SO4concentration, 1,380 mg liter−1; maximum Clconcentration, 235 mg liter−1; maximum Fconcentration, 400 mg liter−1)a

pHAmt of dissolved total Pb
ppm%
0.511.512.59
15.221.17
1.53.230.73
22.630.59
2.52.500.56
32.570.58
3.52.760.62
42.930.66
  • a The minimum and maximum concentrations were calculated according to data in Table 1.