International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
Vol. 9, No. 3, 2012, pp. 409-416
Bioline Code: st12041
Full paper language: English
Document type: Research Article
Document available free of charge
International Journal of Environment Science and Technology, Vol. 9, No. 3, 2012, pp. 409-416
© Copyright 2012 - Center for Environment and Energy Research and Studies (CEERS)
Estimation of bioavailability of polycyclic aromatic hydrocarbons in river sediments|
Froehner, S.; Dombroski, L.F.; Machado, K.S.; Fernandes, C. Scapulatempo & Bessa, M.
This study aimed to evaluate the total concentration of polycyclic aromatic hydrocarbons in sediments of Iguassu River in Southern Brazil. Alongside the concentration, the amount of such compounds bioavailable was also evaluated. This is accomplished by comparing its total amount present in sediments and the amount extracted by n-butanol. The results showed that the total concentration of polycyclic aromatic hydrocarbons presented in sediment ranged from 4.49 to 58.75 μg/g. The total amount of polycyclic aromatic hydrocarbons extracted by n-butanol ranged from 1.22 to 17.07 μg/g. The use of n-butanol represents the mimetic conditions that hydrocarbons, derived from oil, could be taken up by organisms. Most of the hydrocarbons extracted by n-butanol were those with lower octanol–water partition constant, usually those with three and four rings. Compounds with more than four rings were extracted in lower or insignificant amounts. Even the hydrocarbons with lower molecular weight available may be degraded or eliminated by organisms, when accumulated. Estimating bioavailability of hydrocarbons represents what specific hydrocarbons could be available to be taken up by organisms.
Accumulation; Estimating bioavailability; Hydrocarbons from oil; Toxicity
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