versión On-line ISSN 0718-0764
LARA-DIAZ, René A y MELGOZA-ALEMAN, Rosa M. Solidification-Stabilization of Chromium, Nickel and Lead in a Concrete Solid Matrix of Portland Cement. Inf. tecnol. [online]. 2009, vol.20, n.1, pp. 29-38. ISSN 0718-0764. doi: 10.4067/S0718-07642009000100005.
The technique of cementation was validated as an alternative method for the solidification-stabilization of heavy metal synthetic wastes, chromium, nickel and lead, using concrete solid cylinders made of Portland cement. The cementation process takes place starting with a concrete mixture base with compressive strength of 29.4 N/mm2. Metals were incorporated as metallic salts in the mixing water. Tests of compressive strength, leaching of metals by PECT with atomic absorption were performed and retention efficiencies were calculated. Concrete made with Portland cement is appropriate for the solidification-stabilization of nickel and lead, with maximum concentrations of 0.43% of nickel and 1.94% of lead in concrete.
Palabras clave : concrete; solidification-stabilization; Portland cement; heavy metals; leaching.