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

• Autorzy: Styszko K. , Sosnowska K. , Wojtanowicz P. , Gołaś J. , Górecki J. , Macherzynski M.

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 K_d, the Freundlich constant K_F and the organic carbon normalized coefficient K_oc 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 K_d values ranged between 1.14 and 2.29 L/kg, K_F 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 K_oc with modelled K_oc calculated on the base of octanol-water partitioning coefficient KO_ow shows that the prediction of sorption behaviour cannot be based only on K_ow. 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 K_d, ciało stałe-roztwór wodny, stałych Freundlicha K_F oraz współczynników adsorpcji znormalizowanych względem węgla organicznego K_oc. 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: K_d - 1.14 i 2.29 L/kg, K_F - 0.25 i 5.48 oraz K_oc -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 K_oc obliczoną na podstawie współczynnika podziału oktanol-woda K_ow z wartością eksperymentalną K_oc. Wykazano, iż zdolności sorpcyjne związków nie mogą być prognozowane tylko w oparciu o wartość K_ow, gdyż współczynnik ten nie opisuje sorpcji związków polarnych i jonowych.

Słowa kluczowe

EN

sorption; sediment(s); pharmaceutical analysis

PL

sorpcja ibuprofenu; sedymenty; zbiornik wody pitnej

• Wydawca: Institute of Environmental Engineering, Polish Academy of Sciences
• Czasopismo: Archives of Environmental Protection
• Rocznik: 2010
• Tom: Vol. 36, no. 4
• Strony: 81--91
• Opis fizyczny: Bibliogr. 33 poz., tab., wykr.

Twórcy

autor

Styszko K.

autor

Sosnowska K.

autor

Wojtanowicz P.

autor

Gołaś J.

autor

Górecki J.

autor

Macherzynski M.

• Department of Environmental Sciences in Energy Research, AGH University of Science and Technology, Mickiewicza ave. 30, 30-059 Krakow, Poland,

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