Biofilm controlled sorption of selected acidic drugs on river sediments characterized by different organic carbon content
| Autor: | József Dobor, Gyula Záray, Margit Varga |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Ketoprofen
Geologic Sediments Naproxen Diclofenac Environmental Engineering Health Toxicology and Mutagenesis chemistry.chemical_element Ibuprofen Gas Chromatography-Mass Spectrometry Reaction rate constant Rivers medicine Environmental Chemistry Total organic carbon Chromatography Anti-Inflammatory Agents Non-Steroidal Public Health Environmental and Occupational Health Aqueous two-phase system Sorption General Medicine General Chemistry Hydrogen-Ion Concentration Pollution Carbon Partition coefficient chemistry Biofilms Water Pollutants Chemical medicine.drug Nuclear chemistry |
| Zdroj: | Chemosphere. 87:105-110 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2011.11.067 |
| Popis: | The sorption process of selected non-steroidal anti-inflammatory drugs (ibuprofen, naproxen, ketoprofen, diclofenac) on biofilm covered river sediments were investigated in laboratory. In the course of the experiments, the effect of pH of aqueous phase, the effect of TOC (total organic carbon) content of biofilm on the sorption processes were studied. The determination of concentration of drugs was performed by gas chromatography mass spectrometry (GC-MS) both in liquid and solid phases. The pseudo-first-order rate constant of the sorption was found to be 83 min(-1). The effect of pH on the sorption of diclofenac was significantly lower than the obtained values in case of the other three drugs. The calculated K(d) (sorption coefficient) values increased in the sequence of ibuprofen, naproxen, ketoprofen and diclofenac and varied between 0.1-0.4; 0.2-0.7; 0.2-1.2; 0.2-1.4 kg L(-1) respectively, depending on the characteristics of the sediments. The value of K(d)×f(oc) showed a straight line as function of f(oc) (fraction of organic carbon) therefore, instead of the widely distributed normalization process (K(d)/f(oc)), an empirical equation (K(d)=A/f(oc)+B) was suggested for estimation of the K(d) values in case of different TOC content sediments. |
| Databáze: | OpenAIRE |
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