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Sorption of ibuprofen on sediments from the Dobczyce (southern Poland) drinking water reservoir

Identyfikatory
Warianty tytułu
PL
Sorpcja ibuprofenu na sedymentach pochodzących ze zbiornika wody pitnej w Dobczycach
Języki publikacji
EN
Abstrakty
EN
This work determined the solid-water distribution coefficient Kd, the Freundlich constant KF and the organic carbon normalized coefficient Koc of ibuprofen in natural, aquifer sediments. They are characterized as silt sediments with different clay and sand fraction contents varied in specific surface areas. Content of organic carbon and pH are on the same level. For determining sorption coefficients values of ibuprofen in sediments, its concentration was measured in the aqueous and calculated in the solid phase. Batch tests were conducted following OECD Guideline 106. The resulting Kd values ranged between 1.14 and 2.29 L/kg, KF between 0.25 and 5.48 and KOC between 1.22 and 2.53 for ibuprofen in sediments S1 and S2, respectively. These experiments proved that the presence of clay minerals beside organic carbon and pH might be relevant in sorption of ibuprofen in sediments. A comparison of experimentally determined Koc with modelled Koc calculated on the base of octanol-water partitioning coefficient KOow shows that the prediction of sorption behaviour cannot be based only on Kow. This is probably due to the fact that these approaches well describe hydrophobic interactions, but fail to predict sorption of polar and ionic compounds.
PL
W niniejszej pracy oszacowano stopień sorpcji ibuprofenu na sedymentach pobranych ze zbiornika wody pitnej w Dobczycach poprzez wyznaczenie współczynników podziału Kd, ciało stałe-roztwór wodny, stałych Freundlicha KF oraz współczynników adsorpcji znormalizowanych względem węgla organicznego Koc. Proces sorpcji ibuprofenu badano na dwóch sedymentach (S1, S2) o zbliżonej zawartości węgla organicznego oraz pH, zróżnicowanych natomiast pod względem składu granulometrycznego i wielkości powierzchni właściwej. Analizy wykonano opierając się na wytycznych normy OECD nr 106. Eksperymentalne wartości współczynników charakteryzujących sorpcję ibuprofenu dla sedymentów S1 i S2 wynoszą odpowiednio: Kd - 1.14 i 2.29 L/kg, KF - 0.25 i 5.48 oraz Koc -1.22 i 2.53. Wykazano, iż zawartość frakcji gliniastej obok zawartości węgla organicznego i pH materiału sorpcyjnego może mieć istotny wpływ na procesy sorpcji ibuprofenu. Ponadto porównano modelową wartość współczynnika Koc obliczoną na podstawie współczynnika podziału oktanol-woda Kow z wartością eksperymentalną Koc. Wykazano, iż zdolności sorpcyjne związków nie mogą być prognozowane tylko w oparciu o wartość Kow, gdyż współczynnik ten nie opisuje sorpcji związków polarnych i jonowych.
Rocznik
Strony
81--91
Opis fizyczny
Bibliogr. 33 poz., tab., wykr.
Twórcy
autor
autor
autor
autor
  • Department of Environmental Sciences in Energy Research, AGH University of Science and Technology, Mickiewicza ave. 30, 30-059 Krakow, Poland, styszko@agh.edu.pl
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUS8-0005-0038
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