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Este trabalho investigou a presenca de 16 hidrocarbonetos policiclicos aromaticos (HPAs) em lodo de esgoto e em solo com aplicacao de lodo como fertilizante agricola e simulou o risco de contaminacao por HPAs a longo prazo. As amostras foram extraidas usando diclorometano e em seguida com n-hexano em banho ultrassonico. A limpeza do extrato foi feita em coluna de alumina. As quantificacoes dos HPAs foram obtidas por cromatografia gasosa acoplada a um espectrometro de massas (GC-MS/MS ion trap). Os resultados evidenciaram que HPAs encontrados em lodos de esgoto podem apresentar risco de contaminacao de solos. As simulacoes das concentracoes dos HPAs no solo por meio de modelos matematicos foram utilizadas para indicar uma ordem de prioridade para monitoramento da qualidade do solo: fenantreno > criseno > benzo(k)fluoranteno > benzo(a)pireno > pireno > benzo(b)fluoranteno > benzo(g,h,i)perileno > indeno(1,2,3-c,d)pireno > fluoranteno > benzo(a)antraceno > dibenzo(a,h)antraceno > fluoreno > antraceno > naftaleno > acenafteno > acenaftileno. This work investigated the presence of PAH in sewage sludge and in soil with sewage sludge applied as agricultural fertilizer and simulated a long-term risk of soil contamination by PAH. The samples were extracted using dichloromethane and then with n-hexane in ultrasonic bath. The clean-up of the extract was done on a column containing alumina. The residual PAH were obtained using a gas chromatograph coupled to a mass spectrometer (ion trap GC-MS/MS). The results evidenced that PAH concentration levels found in sewage sludge might raise potential contamination risks to the soil. Simulations of the concentrations of PAHs in soil, by mathematical modeling, allowed to indicate a priority order for monitoring soil quality in terms of these contaminants: phenanthrene > chrysene > benzo(k)fluoranthene > benzo(a)pyrene > pyrene > benzo(b)fluoranthene > benzo(g,h,i)perylene > indeno(1,2,3-c,d)pyrene > fluoranthene > benzo(a)anthracene > dibenzo(a,h)anthracene > fluorene > anthracene > naphthalene > acenaphthene > acenaphthylene.

Risk simulation of soil contamination by polycyclic aromatic hydrocarbons from sewage sludge used as fertilizers