PAHs as quality markers of the sediments in the Lower Taquari sub-basin during the period of intervention in a contaminated site

Authors

  • Paula Hauber Gameiro Programa de Pós-graduação em Ecologia da UFRGS
  • Naiara Costa Pereira Fundação Estadual de proteção Ambiental, FEPAM
  • Jocelita Vaz Rocha Fundação Estadual de proteção Ambiental, FEPAM
  • K.A. Leal
  • Vera Maria Ferrão Vargas UFRGS

DOI:

https://doi.org/10.5132/eec.2018.02.04

Abstract

The region studied on the Taquari River, is close to a site with soil contaminated by wood preservatives, where a route of contaminants into the river was identified. This site was submitted to the first stage of the intervention process excavating the soil to remove the main active sources. To assess sediment quality the PAHs concentrations were analyzed: before, during and after the process. The PAHs concentration was compared to the guide values adopted by CONAMA resolution 344/04, aiming to protect aquatic life. Four points on Taquari River were tested, upper (TA032), in front (TA010) and lower (TA006, TA004) the contaminated site. Besides these, the Stream that is considered a source of contamination for TA010 was evaluated in the last step. The results indicated values between ISQG (Interim Sediment Quality Guidelines and PEL (Probable Effect Level) observed for eight PAHs. The PAHs values, probably carcinogenic to humans, were between ISQG and PEL in different samplings at TA010, more expressives during and after intervention. These values were also found at TA006 and TA004 during the same periods. The persistent contamination of the critical point TA010, even after intervention, is a warning regarding the environmental quality and aquatic life of this region.

Author Biographies

Paula Hauber Gameiro, Programa de Pós-graduação em Ecologia da UFRGS

Departamento de Pesquisas e Análises Laboratoriais

Fundação Estadual de proteção Ambiental, FEPAM

 

Naiara Costa Pereira, Fundação Estadual de proteção Ambiental, FEPAM

Departamento de Pesquisas e Análises Laboratoriais

Fundação Estadual de proteção Ambiental, FEPAM

Jocelita Vaz Rocha, Fundação Estadual de proteção Ambiental, FEPAM

Departamento de Pesquisas e Análises Laboratoriais

 Fundação Estadual de proteção Ambiental, FEPAM

Vera Maria Ferrão Vargas, UFRGS

Centro de Ecologia 

Programa de Pós-graduação em ecologia, UFRGS

Departamento de Pesquisas e Análises Laboratoriais

Fundação Estadual de proteção Ambiental, FEPAM

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Published

29-06-2018

How to Cite

Gameiro, P. H., Pereira, N. C., Rocha, J. V., Leal, K., & Vargas, V. M. F. (2018). PAHs as quality markers of the sediments in the Lower Taquari sub-basin during the period of intervention in a contaminated site. Ecotoxicology and Environmental Contamination, 13(2), 19–23. https://doi.org/10.5132/eec.2018.02.04