versión On-line ISSN 0718-0764
TRUJILLO, Eduardo; MARTINEZ, Verónica y FLORES, Nadia S. Chemical Equilibrium Adjustment of Drinking Water with Corrosive Tendency by Carbon Dioxide. Inf. tecnol. [online]. 2008, vol.19, n.6, pp. 89-101. ISSN 0718-0764. doi: 10.4067/S0718-07642008000600010.
On this research drinkable water from the main supply tank of the city of Toluca, México State, is analyzed in order to define its corrosive or scale forming tendency and set up low price chemical equilibrium conditions. The Mojmir Mach model and Langelier-Ryznar indexes were implemented in a software called AgrInc_Agua 2.0 to apply them on physical-chemical data of water samples obtained during six months. This water fulfills the mexican standards for human use and consumption. However, using X ray diffraction to identify corrosion products and using the elementary composition by semi quantitative micro analysis, it was proved that the presence of CO2 tends to corrode the hydraulic infrastructure in a slow way. Chemical equilibrium conditions were established using calcium hydroxide, calcium carbonate and aeration. All these variables can help in protecting the hydraulic infrastructure and to reduce the maintenance, replacement and corrosion products frequency.
Palabras clave : chemical equilibrium; corrosion; scale forming; drinkable water; Mojmir Mach method.