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Psidium guajava as a bioaccumulator of nickel around an oil refinery, southern Brazil.
Trindade Perry, Carolina; Divan, Armando Molina; Raya Rodriguez, Maria Teresa; Lúcia Atz, Vera.
Afiliação
  • Trindade Perry C; Post-graduation in Ecology, Federal University of Rio Grande do Sul, 91.509-900 Porto Alegre, RS, Brazil.
Ecotoxicol Environ Saf ; 73(4): 647-54, 2010 May.
Article em En | MEDLINE | ID: mdl-20036423
To evaluate the potential of Psidium guajava as a biological accumulator of air pollutants, saplings were exposed at nine sites receiving atmospheric emissions from an oil refinery (five within, four outside the industrial area) and another reference site located at the Federal University of Rio Grande do Sul, 27 km from the refinery. Exposures lasted about 3 months each, coincided with the seasons, and totaled five exposures between 2005 and 2006. The following parameters were evaluated: dry weight of leaves, stems, and roots, leaf area, rate of relative height increase, Ni and S contents, maximum assimilation rate, and carboxylation efficiency invivo. P. guajava was found to be an efficient accumulator of Ni, since highly significant differences were observed (P<0.001) between sites within the industrial area and the reference site for all periods of exposure and a significant negative correlation between distance from emission source and Ni content. The S content showed significant differences (P<0.05) only at sites within the industrial area for two exposures. The dry weight, leaf area, rate of relative height increase, maximum assimilation rate, and carboxylation efficiency did not present significant differences for any period of exposure. In view of the above, we conclude that P. guajava is a good bioaccumulator for Ni.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Psidium / Poluentes Atmosféricos / Níquel País/Região como assunto: America do sul / Brasil Idioma: En Revista: Ecotoxicol Environ Saf Ano de publicação: 2010 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Psidium / Poluentes Atmosféricos / Níquel País/Região como assunto: America do sul / Brasil Idioma: En Revista: Ecotoxicol Environ Saf Ano de publicação: 2010 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda