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Original title:
TEMPERATURE INFLUENCE ON DESORPTION AND DETERMINATION OF BIOACCESSIBLE PAHS
Authors: Čvančarová, Monika ; Pokorná, Lenka ; Velebová, R. ; Najmanová, P. ; Cajthaml, Tomáš
Document type: Papers
Conference/Event: Inovativní sanační technologie ve výzkumu a praxi /6./, Praha (CZ), 2013-10-16 / 2013-10-17
Year: 2013
Language: eng
Abstract: Hydrophobic organic pollutants tend to adsorb onto soil particles which can cause a significant decrease in their bioaccessible fractions. Definition of the bioaccessibility is currently not unified; however it represents a part of total PAHs amount which is potentially available for biological processes. It is an important parameter which can be used for prediction of microbial degradation and environmental risk evaluation. This paper studies desorption behavior of PAHs at 20 and 60˚C. The desorption of PAHs from long-term contaminated soils was evaluated using resin Amberlite XAD- 2. A two-phase desorption model was used to calculate the desorption kinetic curves and F fractions which represent bioaccessible amount of PAHs. The results showed that the desorption of PAHs was significantly influenced by temperature. The greatest differences in the desorption behavior were observed at 5–6 ring PAHs. We compared the F fractions and the rate constants of individual PAHs which were determined at 20 and 60˚C. The results were also compared with sequential supercritical fluid extraction which has been already used for prediction of microbial degradation.
Keywords: pahs
Project no.: TA01020804 (CEP)
Funding provider: GA TA ČR
Host item entry: Inovativní sanační technologie ve výzkumu a praxi, ISBN 978-80-86832-73-9
Institution: Institute of Microbiology AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0231747
Permalink: http://www.nusl.cz/ntk/nusl-170520
The record appears in these collections:
Research > Institutes ASCR > Institute of Microbiology
Conference materials > Papers
Authors: Čvančarová, Monika ; Pokorná, Lenka ; Velebová, R. ; Najmanová, P. ; Cajthaml, Tomáš
Document type: Papers
Conference/Event: Inovativní sanační technologie ve výzkumu a praxi /6./, Praha (CZ), 2013-10-16 / 2013-10-17
Year: 2013
Language: eng
Abstract: Hydrophobic organic pollutants tend to adsorb onto soil particles which can cause a significant decrease in their bioaccessible fractions. Definition of the bioaccessibility is currently not unified; however it represents a part of total PAHs amount which is potentially available for biological processes. It is an important parameter which can be used for prediction of microbial degradation and environmental risk evaluation. This paper studies desorption behavior of PAHs at 20 and 60˚C. The desorption of PAHs from long-term contaminated soils was evaluated using resin Amberlite XAD- 2. A two-phase desorption model was used to calculate the desorption kinetic curves and F fractions which represent bioaccessible amount of PAHs. The results showed that the desorption of PAHs was significantly influenced by temperature. The greatest differences in the desorption behavior were observed at 5–6 ring PAHs. We compared the F fractions and the rate constants of individual PAHs which were determined at 20 and 60˚C. The results were also compared with sequential supercritical fluid extraction which has been already used for prediction of microbial degradation.
Keywords: pahs
Project no.: TA01020804 (CEP)
Funding provider: GA TA ČR
Host item entry: Inovativní sanační technologie ve výzkumu a praxi, ISBN 978-80-86832-73-9
Institution: Institute of Microbiology AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0231747
Permalink: http://www.nusl.cz/ntk/nusl-170520
The record appears in these collections:
Research > Institutes ASCR > Institute of Microbiology
Conference materials > Papers
Record created 2014-03-06, last modified 2021-11-24