|
CEE 680 |
UMass-Amherst |
Water
Chemistry
Notes on the Use of the PC
version of
MINEQL+
We
are currently using Version 4.6 in CEE 680, which is compatible with Vista and
earlier MS platforms. For those who wish
to purchase their own version, visit the commercial website:
For
many years Version 3.01 was available for free download, and as a result it is
still widely used.
·
Type-I Species: soluble species that
comprise the basic components of the solution and its solutes. These must be a collection of independent
species. Species that are merely
combinations of previously specified Type-I species should not be included.
·
Type-II Species: aqueous complexes that
form from the Type-I species.
·
Type-III Species: solids or other substances
with fixed activity (e.g., precipitates that never completely dissolve,
atmospheric gases, pH in a pH-controlled environment)
·
Type-IV Species: precipitates that could
become completely dissolved and therefore go from an activity of one to zero
·
Type-V Species: substances that could
precipitate, but do not yet exist as a precipitate
·
Type-VI Species: substances that are not
considered in the calculations
Simple
Acid/Base composition example for version
4.6 and version
3.01.