Título:	Bioconcentration factor estimates of polycyclic aromatic hydrocarbons in grains of corn plants cultivated in soils treated with sewage sludge.
Autoria:	PARAIBA, L. C. QUEIROZ, S. C. do N. de MAIA, A. de H. N. FERRACINI, V. L.
Afiliação:	LOURIVAL COSTA PARAIBA, CNPMA; SONIA CLAUDIA DO N DE QUEIROZ, CNPMA; ALINE DE HOLANDA NUNES MAIA, CNPMA; VERA LUCIA FERRACINI, CNPMA.
Ano de publicação:	2010
Referência:	Science of the Total Environment, v. 408, n. 16, p. 3270-3276, 2010.
Conteúdo:	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 PAH 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 PAH 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.
Palavras-chave:	Hidrocarboneto aromático policíclico Lodo de esgoto
Digital Object Identifier:	10.1016/j.scitotenv.2010.04.026
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPMA)