TY  - JOUR
AU  - Dobor, József
AU  - Oltiné Varga, Margit
AU  - Záray, Gyula
TI  - Biofilm controlled sorption of selected acidic drugs on river sediments characterized by different organic carbon content
JF  - CHEMOSPHERE
J2  - CHEMOSPHERE
VL  - 87
PY  - 2012
IS  - 2
SP  - 105
EP  - 110
PG  - 6
SN  - 0045-6535
DO  - 10.1016/j.chemosphere.2011.11.067
UR  - https://m2.mtmt.hu/api/publication/1857294
ID  - 1857294
N1  - Department of Analytical Chemistry, Institute of Chemistry, L. Eötvös University, P.O. Box 32, H-1117 Budapest, Hungary            
            Cooperative Research Centre of Environmental Sciences, L. Eötvös University, P.O. Box 32, H-1518 Budapest, Hungary            
            Cited By :27            
            Export Date: 16 September 2019            
            CODEN: CMSHA            
            Correspondence Address: Varga, M.; Department of Analytical Chemistry, Institute of Chemistry, L. Eötvös University, P.O. Box 32, H-1117 Budapest, Hungary; email: oltine@chem.elte.hu
AB  - 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 Kd (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 Kd × foc showed a straight line as function of foc (fraction of organic carbon) therefore, instead of the widely distributed normalization process (Kd /foc), an empirical equation (Kd = A/foc + B) was suggested for estimation of the Kd values in case of different TOC content sediments. © 2011 Elsevier Ltd. All rights reserved.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Szabo, RK
AU  - Megyeri, C
AU  - Illés, Erzsébet
AU  - Schrantz, Krisztina
AU  - Mazellier, P
AU  - Dombi, András
TI  - Phototransformation of ibuprofen and ketoprofen in aqueous solutions
JF  - CHEMOSPHERE
J2  - CHEMOSPHERE
VL  - 84
PY  - 2011
IS  - 11
SP  - 1658
EP  - 1663
PG  - 6
SN  - 0045-6535
DO  - 10.1016/j.chemosphere.2011.05.012
UR  - https://m2.mtmt.hu/api/publication/1835190
ID  - 1835190
AB  - The UV (254 nm) and UV/VUV (254/185 nm) photolysis of two anti-inflammatory drugs, ibuprofen and ketoprofen, have been studied in aqueous solutions as a possible process for the removal of non-biodegradable compounds. We have examined the effects of dissolved oxygen and initial target concentration. Upon irradiation at 254 nm, the decomposition rate of ketoprofen is almost forty times higher as it of ibuprofen whilst VUV irradiation only increased the ibuprofen decomposition rate. The presence of dissolved oxygen accelerated the photodegradation of ibuprofen, whereas no effect was observed on the degradation of ketoprofen. The maximum quantum yield for the phototransformation was 0.2. The rate of mineralization in both cases was similar to 60%, even after 1 h of treatment and this suggests the formation of stable by-products which were identified using GC-MS and HPLC-MS, respectively. (C) 2011 Elsevier Ltd. All rights reserved.
LA  - English
DB  - MTMT
ER  -