Bioconcentration factor estimates of polycyclic aromatic hydrocarbons in grains of corn plants cultivated in soils treated with sewage sludge

Autor(es)

Paraiba, Lourival Costa ^[1] ; Nascimento Queiroz, Sonia Claudia ^[1] ; Nunes Maia, Aline de Holanda ^[1] ; Ferracini, Vera Lucia ^[1]

Afiliação do(s) autor(es)

^[1] Embrapa Meio Ambiente Embrapa Environm, BR-13820000 Jaguariuna, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Science of The Total Environment; v. 408, n. 16, p. 3270-3276, JUL 15 2010.
• Citações Web of Science: 13

Resumo

This study presents a model to simulate the organic substance concentrations in corn grains assuming that the substances in soil solution are absorbed via the transpiration stream by plants growing in soils fertilized with sewage sludge (SS). The model was applied and validated using soil and corn grain samples from a long-term field experiment with six successive yearly applications of SS to the soil. The following polycyclic aromatic hydrocarbons (PAHs) were simulated and evaluated in soil and grain samples: acenaphthene, acenaphthylene, anthracene, benz(a)anthracene, benz(a)pyrene, benz(b)fluoranthene. benz(g,h,i)perylene, benz(k)fluoranthene, chrysene, dibenz(a,h)anthracene, fluoranthene, fluorene, indeno(1,2,3-c,d)pyrene, naphthalene, phenanthrene and pyrene. The PAN bioconcentration factors (BCF) in corn grains ranged from 1.57 to 10.97 L kg(-1). Polycyclic aromatic hydrocarbons with low soil distribution coefficients and high values of transpiration stream concentration factors (TSCF) are more likely to be absorbed by corn plants and accumulated in grains. It was possible to estimate and observe that highly lipophilic PAN molecules (heavy PAHs) show lower accumulative potential in corn grains than the less lipophilic ones (light PAHs). Sewage sludges containing significant concentrations of light PAHs with two, three or four benzene rings should be avoided as fertilizers in alimentary field crops. (C) 2010 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 07/04427-8 - Bioconcentração de hidrocarbonetos policíclicos aromáticos (HPAs) em grãos de milho cultivados em solos com lodo de esgoto
• Beneficiário: Lourival Costa Paraíba
• Modalidade de apoio: Auxílio à Pesquisa - Regular