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Communication Dans Un Congrès Année : 2009

Complementarity of POCIS and SPMD for in-situ monitoring of moderately hydrophobic molecules in freshwater and wastewater

Complémentarité du POCIS et du SPMD pour le suivi in-situ de molécules modérément hydrophobes dans les eaux douces et les eaux usées

Résumé

Polar organic chemical integrative sampler (POCIS) and semi-permeable membrane device (SPMD) are among the most commonly used passive samplers for the monitoring of organic micropollutants in water [Vrana 2005]. POCIS is used to monitor hydrophilic molecules (log Kow < 4), such as pharmaceuticals or pesticides [Alvarez 2004]. SPMD is designed for sampling hydrophobic molecules (log Kow > 2), like polychlorinated biphenyls (PCB) or polycyclic aromatic hydrocarbons (PAH) [Huckins, 1990]. The objective of the present work is to verify and take advantage of the complementarity of these two samplers to monitor molecules of moderate hydrophobicity (log Kow < 5) in freshwater systems impacted by wastewater treatment plants (WWTP) inputs. The studied molecules include 10 betablockers (acebutolol, atenolol, betaxolol, bisoprolol, metoprolol, nadolol, oxprenolol, propranolol, sotalol, timolol), 5 estrogenic hormones (estrone, 17a-estradiol, 17a-estradiol, estriol, 17a-ethynilestradiol) and 5 alkylphenols (4-tert-octylphenol, 4-nonylphenol, 4-nonylphenol-monoethoxylate, 4-nonylphenol-diethoxylate, 4-nonylphenoxyacetic acid). Five sampling campaigns were carried out in France: on the Saône River (November 2007), the Jalle River (March 2008), the Ardières River (June 2008), the Bourbre River and the Seine River (September 2008). POCIS and SPMD were exposed in surface waters upstream and downstream WWTP inputs, as well as in the WWTP effluent. Grab samples were periodically collected from each site during the exposure periods. Samplers were exposed between three days and three weeks in order to study the accumulation kinetics and linearity. Repeatability was checked by the exposure of triplicate samplers. We also tested in situ the benefit of using performance reference compounds (PRC). In order to recover the accumulated contaminants, the samplers were then processed, by elution of the adsorbant for POCIS and organic solvent dialysis for SPMD, and the extracts were analysed by LC-MS/MS. The results will be discussed with regards to repeatability, accumulation kinetic and linearity range, concentration factor and agreement between passive sampling and grab sampling. At last, the two samplers will be compared in terms of practical use and cost.
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Dates et versions

hal-02595074 , version 1 (15-05-2020)

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R. Jacquet, Cecile Miege, Claire Soulier, H. Budzinski, Marina Coquery. Complementarity of POCIS and SPMD for in-situ monitoring of moderately hydrophobic molecules in freshwater and wastewater. 3rd International Passive Sampling Workshop (IPSW), May 2009, Prague, Czech Republic. ⟨hal-02595074⟩

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