Column experiments supported dissolution rates derived from the literature and indicated a potentially strong effect of plant-derived organic ligands on mineral dissolution congruency and secondary phase precipitation.
It, therefore, becomes apparent that the dissolution data derived from the physico-chemically and hydro-dynamically defined conditions is required in order to compare various in vitro dissolution data and to be able to use such results as a surrogate for possible in vivo bioequivalence testing and in vitro- in vivo correlations (IVIVC) [ 1, 2].
Finally, these experiments permit rough estimation of the impact of CO2-induced oceacidificationion on the gross calcification rates of various marine calcifiers, calculated as the difference between net calcification rates derived empirically in prior studies and gross dissolution rates derived from the present study.
This result is validated by δ13CDIC values (−9.8 to −3.7‰ VPDB) which represents a mixture of DIC produced by the following weathering pathways: (i) carbonate dissolution by carbonic acid (−8.25‰) > (ii) silicate dissolution by carbonic acid (−17‰) ≈ (iii) carbonate dissolution by sulfuric acid derived from the oxidation of sulfides (coupled sulfide-carbonate weathering) (+0.5‰).
The groundwater from the granite is rich in the Ca2+ and Na+ cations derived from dissolution of the plagioclase feldspar (a sodium, calcium aluminosilicate), which is a major mineral found in this rock type.
Ca2+ can be derived from dissolution of carbonate and evaporitic minerals (e.g., calcite, dolomite, aragonite, gypsum and anhydrite) as well as carbonate cement within formations (Bozdağ and Göçmez 2013).
Bicarbonate may also be derived from the dissolution of carbonates and/or silicate minerals.
When all Cl is derived from halite dissolution, the increase in (Ca2+ + Mg2+) corresponds to increasing (Cl).
Sulfate mainly is derived from the dissolution of salts of sulfuric acid and abundantly found in almost all water bodies.
Generally, the DIC in karst groundwater is dominantly derived from carbonate dissolution by carbonic acid.
