MOBILITY OF MERCURY OF THE DENTAL AMALGAM IN REDUCTION PROCESS

Authors

  • Raquel Dalla Costa
  • Célia Regina Granhen Tavares
  • Eneida Sala Cossich
  • Terezinha Aparecida Guedes

DOI:

https://doi.org/10.17058/tecnolog.v12i2.362

Keywords:

Factorial design. Mercury. Dental amalgam. Sediments

Abstract

The dental wastewater can contribute to the total daily mercury load on environment. Factorial design of experiments is useful to analysis of factors that influence in this mobility. The aim of the present study was to design experiments to examine the effects of operational variables – temperature, pH and contact time - which may affect the mobility of mercury in form of dental amalgam residue in reduction process in the sediments of the Pirapó River. Based on the factorial design of experiments and the analysis of variance, the temperature was the most significant factor in this process, followed by the pH and contact time. The parameters affecting the mobility of total mercury showed that when the temperature and contact time increases and pH decreases there is an important increase of mercury concentration in process. For the tested conditions, the high total mercury concentration was obtained using the temperature = 35oC, pH = 4.0 and contact time = 10 days.

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Published

2008-10-20

How to Cite

Dalla Costa, R., Tavares, C. R. G., Cossich, E. S., & Guedes, T. A. (2008). MOBILITY OF MERCURY OF THE DENTAL AMALGAM IN REDUCTION PROCESS. Tecno-Lógica, 12(2), 1-6. https://doi.org/10.17058/tecnolog.v12i2.362

Issue

Vol. 12 No. 2 (2008)

Section

Environmental Technology

License

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