Laboratory investigations of diclofenac migration in saturated porous media – a case study
Author:
Okońska Monika1, Marciniak Marek1, Zembrzuska Joanna2, Kaczmarek Mariusz3
Affiliation:
1. Adam Mickiewicz University , Institute of Physical Geography and Environmental Planning , Krygowskiego 10, 61-680 Poznań , Poland 2. Poznan University of Technology , Institute of Chemistry and Technical Electrochemistry , Berdychowo 4, 60-965 Poznań , Poland 3. Kazimierz Wielki University in Bydgoszcz , Institute of Mechanical Engineering of the Environment and Applied Information Technology , Kopernika 1, 85-074 Bydgoszcz , Poland
Abstract
Abstract
At present, concentrations of pharmaceuticals in surface and ground waters are low; however, even low concentrations of certain substances may prove very harmful. One of such pharmaceutical drugs is diclofenac, a popular non-steroidal anti-inflammatory drug (NSAID). For this reason, it is important to determine its mobility in groundwater and to estimate parameters of migration. Authors conducted column tests for two porous media: an artificial one, consisting of glass granules, and a natural one, i.e., sandur sand obtained from a site north of the city of Poznań (Poland). During the test, impulse breakthrough curves of chloride ions and diclofenac were recorded. The results were used to identify a specific sorption model and to determine values of migration parameters. Solutions of the inverse problem using optimisation methods and of equations of mathematical migration models were carried out in a MATLAB environment. Based on test results, the mobility of diclofenac is shown to be very high and comparable to that of chloride ions. The tests also revealed a slight and irreversible sorption of diclofenac on grains of both porous media.
Publisher
Walter de Gruyter GmbH
Subject
General Earth and Planetary Sciences
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