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REMEDIATION OPTIONS APPLICABLE TO A Cr(VI) CONTAMINATED SITE IN MEXICO

Hexavalent chromium is a critical pollutant commonly released into the environment as a result of its applications in numerous industrial processes, such as the production of stainless steel, in plating, tanning of leather and the production of metallic pigments, among others. The harmful toxic effects of Cr(VI) on humans, animals, plants and microorganisms is well known. Human health disorders include organ damage, dermatitis and respiratory impairment, as well as the proliferation of respiratory cancer (Proctor et al., 2002; Langard, 1990). Cr(VI) has an elevated mobility in the environment due to its high solubility in water in a wide pH range that may cause environmental problems when not adequately managed.

For more than 20 years an abandoned chemical production plant (Cromatos de México S. A.) has generated approximately 70,000 metric tons of chromium ore production residue (COPR). The severe superficial and underground contamination with Cr(VI) classifies the site as one of the most polluted in Mexico. Although various alternatives have been proposed to clean-up the site, no viable and cost effective proposal for a remediation has been put in place so far. In this study, four technologies are compared in function of Cr(VI) reduction efficiency, technical and economic feasibility.

Copyright:	© IWWG International Waste Working Group
Quelle:	Specialized Session D (Oktober 2007)
Seiten:	11
Preis:	€ 0,00
Autor:	Juan Antonio Velasco Trejo Ing. David Alejandro de la Rosa Perez Martha Elena Ramirez Islas Wolfgang Schmidt
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