Caustic waste injected in dolomite

The fluid contains arbitrarily small amounts of Ca++, Mg++, and HCO3, as is necessary in order for the program to be able to recognize dolomite. The initial magnesium content is set small to assure that the hydroxide mineral brucite is not supersaturated in the alkaline fluid. 

At the point of dolomite saturation, where reaction ceases, pH has decreased from 13 to about 11.9 (Fig. 29.3). The overall reaction between the fluid and dolomite, 

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