Tecnología limpia aplicada al tratamiento y aprovechamiento de residuos de amalgama dental

Abstract

ABSTRACT

The world problem regarding the environmental pollution due to human activities where mercury is used increases the contamination generated by the dental amalgam scraps when they are inadequately disposed. Although Colombia has clear regulations regarding this issue, the problem subsists when oral health service institutions discard down the drainpipe, incinerate or bury the amalgam scraps that they produce as a disposal method. This occurs because the regulations are unknown or because, many times, they are partially or incorrectly applied. As a solution to this situation, the Universidad de Antioquia through the research groups: Science and Biomedical Technology, Precious Materials and Pyrometallurgical and Material Researches, and the dental supplies manufacturing and marketing company New Stetic S.A., developed and implemented a eco-efficient recovery process for amalgam wastes in order to prevent any incorrect disposal that negatively impacts the environment, and to take advantage of the recovered metals by returning them to the production line. The process stages include the pyrometallurgical mercury recovery (at high temperatures) using a hermetical distiller called Retorta, and the hydrometallurgical recovery (selective recovery in watery media) of the rest of the constituent metals. The latter permits the obtainment, in an eco-efficient and self-sustainable manner, of each metal which can be taken through a refining process to be reused.

Keywords:

Amalgama dental

residuos de amalgama

mercurio

Retorta

lixiviación

Dental amalgam

amalgam scraps

mercury

Retorta

leaching

References

D. ARENHOLY-BINDSLEV. Dental Amalgam – Environmental Aspects. Adv.Dent. Res., 6:125-130, september 1992, 125-130 p.

PEREA, B., y DEL RIO, P. Recomendaciones Sobre el Tratamiento de los Residuos de Mercurio Procedentes de las Amalgamas de Plata Usadas en Odontoestomatología. Revista Prof. Dent., vol. 4, núm.10, diciembre 2001, 617- 620p.

AMERICAN INSTITUTE OF CHEMICAL ENGINEERS. Fundamental Aspects of Hydrometallurgical Processes, 1978, 151 p.

CONGRESO DE COLOMBIA. Ley 430 de 1998. Bogotá.

GÓMEZ M., Gabriel J. Recuperación Piro e Hidrometalúrgica de los Metales de Desechos de Amalgamas Odontológicas. Trabajo de grado Universidad de Antioquia, 2001, Medellín, 95 p.

Medición del Mercurio. Revista Noticias de Seguridad, Julio 2000, 4 – 9 p.

METALLURGICAL SOCIETY OF AIME. International Symposium on Hydrometallurgy. Hydrometallurgy: Research, Development and Plant Practice: Proceedings. Atlanta, Georgia, 1982, 1020 p.

MINISTERIO DE SALUD Y MINISTERIO DEL MEDIO AMBIENTE. Manual de Procedimientos para la Gestión Integral de Residuos Hospitalarios y Similares en Colombia (MPGIRH), 2002, Bogotá.

MUÑOZ, J. A. Diseño e Implementación de una Planta Semipiloto para el Tratamiento de Residuos de Amalgama Dental. Trabajo de grado Universidad de Antioquia, Medellín, 2004.

REVELO, R. Informe semestre de práctica industrial en New Stetic S.A. Práctica industrial Universidad de Antioquia, Medellín, 1995, 117 p.

RUIZ, J. et al. Manejo de la Amalgama Dental en Consultorios Odontológicos Pequeños y Medianos de Medellín, Itagüí, Envigado, Sabaneta y Bello. Revista Facultad Nacional de Salud Pública, vol. 23, Núm. 1, 2005, 59-69 p.