Darrell Kirk Nordstrom

TL;DR: In this article, the solubility and stability relations among these four minerals and gibbsite are plotted as a function of pH and sulfate activity at 298 K. These equilibrium calculations predict that both sulfate and aluminum can be immobilized in acid waters by the precipitation of aluminum hydroxysulfate minerals.

TL;DR: In this paper, sulfate and water from experiments in which pyrite was oxidized at a pH of 2.0 were analyzed for sulfur and oxygen stable isotopes, and experiments were conducted under both aerobic and anaerobic sterile conditions, as well as under aerobic conditions in the presence of Thiobacillus ferrooxidans to elucidate the pathways of oxidation.

TL;DR: In this paper, the authors analyzed groundwaters from near surface to a depth of 1232 m in the Stripa granite and found that the groundwater composition consists of two general types: a typical recharge water of Ca-HCO3 type ( 700 m depth) of high pH (8-10) that reaches a maximum of 1250 mg/L in total dissolved solids (TDS).

TL;DR: Speciation calculations for aluminum, in water samples taken from a drainage basin containing acid mine waters, demonstrate a distinct transition from conservative behavior for pH below 4.6 to nonconservative behavior above 4.9, corresponding to the pK for the first hydrolysis constant of the aqueous aluminum ion.

TL;DR: In this paper, the pK (10,96), AGY (28008 kcal/mole), AN? (-29259 kcal/Mole), S’ (1639 cal/deg/moles), S S, S S and CF (1616 cal/decmole) for CaF, at 25°C and 1 atm Association constants and reaction enthalpies for fluoride complexes with boron, calcium and iron are included in this review