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The Ability of a Novel Sorptive Polymer to Determine the Freely Dissolved Fraction of Polar Organic Compounds in the Presence of Fulvic Acid or Sediment
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM). (ITMo)
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM). (ITMo)
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
2009 (English)In: Analytical and Bioanalytical Chemistry, ISSN 1618-2642, E-ISSN 1618-2650, Vol. 395, no 5, 1525-1532 p.Article in journal (Refereed) Published
Abstract [en]

In the present study, a novel plastic material, poly(ethylene-co-vinyl acetate-co-carbon monoxide) (PEVAC), was evaluated as an absorptive passive equilibrium sampler for determination of the freely dissolved fraction of seven polar organic contaminants (POCs) in the presence of fulvic acid (FA) and sediment. The seven compounds selected were imidacloprid, carbendazim, metoprolol, atrazin, carbamazepine, diazinon and chlorpyrifos, i.e. a mixture of pharmaceuticals and pesticides having logarithmic octanol/water partitioning coefficient (Log KOW) ranging from 0.2 to 4.77.

The experiments demonstrated that the PEVAC sampler is well suited for determination of the freely dissolved fraction of chemicals in aquatic environments. Generally, the freely dissolved fraction of the POCs decreased with increasing hydrophobicity. However, strong interactions with functional groups of the organic matter seemed to dominate the partitioning for imidacloprid and carbendazim, having logarithmic dissociation partition coefficient (Log D) < 1.47, and for metoprolol which is positively charged at neutral pH.

Place, publisher, year, edition, pages
Springer , 2009. Vol. 395, no 5, 1525-1532 p.
Keyword [en]
Partitioning coefficient, Polar organic compounds, Fulvic acid, Sediment, PEVAC, LC-MS
National Category
Analytical Chemistry
Research subject
Applied Environmental Science
Identifiers
URN: urn:nbn:se:su:diva-35503DOI: 10.1007/s00216-009-3100-6ISI: 000270897000034OAI: oai:DiVA.org:su-35503DiVA: diva2:287445
Projects
This research was financially supported by European Union (European Commission, FP6 Contract No. 003956) “Novel Methods for Integrated Risk Assessment of Cumulative Stressors in the Environment” (NoMiracle).
Available from: 2010-01-18 Created: 2010-01-18 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Methodologies to assess the fate of polar organic compounds in aquatic environments
Open this publication in new window or tab >>Methodologies to assess the fate of polar organic compounds in aquatic environments
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Polar organic compounds (POCs) are chemicals with polar functional groups in their structure. The functional groups make the compounds hydrophilic and less prone to partition with biota. However, the knowledge of their fate is limited due to difficulties associated with their measurements. Although, the persistence of POCs in the environment is generally low, they are considered to be semi-persistent compounds due to their continuous introduction to the environment via wastewater. Studies have shown that complex mixtures of POCs of different classes may have synergistic toxic effects on biota at environmental concentration levels. Therefore, it is important to develop analytical methods in order to establish the occurrence and fate of POCs in aquatic environments.

In Study I, a positive correlation between the sorption of a novel poly(ethylene-co-vinyl acetate-co-carbon monoxide) (PEVAC) material and the theoretical logarithmic dissociation partition coefficient (Log D) for seven POCs was observed. The PEVAC material showed an enhanced sorption of the POCs compared to the silicone material. Study II, demonstrated that the PEVAC sampler assess the freely dissolved concentration of POCs in aquatic environments. The results showed that the PEVAC polymer is an attractive alternative to silicone for mimicing the biological uptake of POCs in aquatic environments. Additionally, Study II showed that total extraction is appropriate for determination of the freely dissolved concentration of uncharged POCs with Log KOW < 2.67 in natural water.

In study III, a novel bag-solid phase extraction (bag-SPE) technique was compared to a conventional SPE-technique. Despite that the extraction efficiencies for POCs in wastewater were lower using the bag-SPE method, the two methods showed similar detection limits due to the lower ion-suppression experienced with the bag-SPE.

In study IV the bag-SPE method was further developed with the aim of lowering the detection limits for POCs. Detection limits (LOD) below 13 ng/L showed that the bag-SPE method was suitable for determination of POCs in surface sea water.

 

Place, publisher, year, edition, pages
Stockholm: Department of Applied Environmental Science (ITM), Stockholm University, 2010. 25 p.
Keyword
Passive equilibrium sampler, Absorbent, Polar organic compounds, Liquid chromatography-mass spectrometry, Partitioning coefficient, Fulvic acid, Sediment, PEVAC, Bag-SPE, Solid phase extraction, Pharmaceuticals, Wastewater, Sea water, UPLC-QToF
National Category
Environmental Sciences Analytical Chemistry
Research subject
Applied Environmental Science
Identifiers
urn:nbn:se:su:diva-35552 (URN)978-91-7447-003-1 (ISBN)
Public defence
2010-02-12, Nordenskiöldsalen, Geovetenskapens hus, Svante Arrhenius väg 12, Stockholm, 10:00 (Swedish)
Opponent
Supervisors
Projects
This research was financially supported by European Union (European Commission, FP6 Contract No. 003956) “Novel Methods for Integrated Risk Assessment of Cumulative Stressors in the Environment” (NoMiracle) and by the Swedish research council Formas.
Available from: 2010-01-21 Created: 2010-01-18 Last updated: 2010-01-18Bibliographically approved

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