Avaliação do destino e bioacumulação de benzo(a)pireno através de simulação computacional

Abstract

Recebido em 25/4/07; aceito em 11/10/07; publicado na web em 2/4/08 ASSESSMENT OF FATE AND BIOACCUMULATION OF BENZO(A)PIRENE BY COMPUTER MODELING. The objective of this work was to evaluate the environmental distribution of benzo(a)pirene, a polycyclic aromatic hydrocarbon, by the EQC model. The modeling of the contaminant distribution was accomplished by means of the fugacity model applied to a hypothetical scenario constituted by air, water, soil and sediment. The modeling and simulations revealed that the soil is the preferential compartment. We also discuss the implications of the results about fate and ecological risks associated with benzo(a)pirene. We concluded that the emissions of HPAs can not be ignored and bioaccumulation among others risks can be induced.

Assessment of bioaccumulation of biphenyls in the trophic chain of a coastal area of Parana, Brazil

“…It is known that PCBs with fewer or no chlorine atoms have lower vapor pressure and are slightly more soluble in water than those with chlorine atoms. These differences have a huge effect on the partition between persistence and environmental spheres, namely the distribution of water, soil, air, and sediments (Froehner and Martins 2008;Gutierrez et al 2007;Marcomini et al 2007). The greater presence of biphenyl in the sediment is also justified by the available quantity of organic matter that becomes a good environment for the adsorption of an organic compound pollutant.…”

“…Therefore, it can be assessed by using mathematical models that evaluate the bioconcentration from the phytoplankton to fish (Burkhard 2003). The model proposed by Mackay (1982) is based on fugacity of the organic compound (Froehner and Martins 2008). On the other hand, the physiological models are based on the diet of each trophic level (Bruggeman et al 1984).…”

Distribution of polycyclic aromatic hydrocarbons in marine sediments and their potential toxic effects

“…The BaP was not found in the samples. Since BaP has high carcinogenic potency (Froehner and Martins 2008) and is present in the environment, the environmental risk assessment associated with the presence of PAHs is often estimated in terms of BaP concentration (Baird et al 2007;Abas et al 2006). Although BaP is not the only compound with carcinogenic properties in the mixture of PAHs, other compounds are also carcinogenic but in smaller proportions than BaP.…”

“…Because of their carcinogenic and mutagenic properties (IARC 1991), these compounds have been intensively studied in the different environmental compartments (Froehner and Martins 2008). Owing to their hydrophobic character, these neutral organic compounds tend to rapidly adsorb to sediment particles and therefore sediments can be considered as a pollution reservoir (Budzinski et al 1997).…”

Avaliação da composição química de sedimentos do Rio Barigüi na região metropolitana de Curitiba

“…3,4 Tais espécies são geralmente liberadas do leito do sedimento devido a alterações nas condições ambientais e físico-químicas (pH, potencial redox e ação microbiana, entre outras), podendo contaminar a água e outros sistemas ambientais, afetando a qualidade da água, levando à bioacumulação através da transferência na cadeia trófica. 4,5 É sabido que as maiores fontes de matéria orgânica são provenientes de plantas terrestres e aquáticas, sendo que as razões entre carbono, nitrogênio e fósforo (C:N:P) são distintas. Alterações nestas razões estequiométricas podem representar contaminações por esgotos domésticos, por exemplo.…”