Performance of passive sampling with low-density polyethylene membranes for the estimation of freely dissolved DDx concentrations in lake environments
| Autor: | A. Patricia Tcaciuc, Raffaella Borrelli, Pietro Cesti, Licia Guzzella, Renato Baciocchi, Iason Verginelli, Philip M. Gschwend, Luciano M. Zaninetta |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
polyethylene
Geologic Sediments Environmental Engineering 010504 meteorology & atmospheric sciences Health Toxicology and Mutagenesis Analytical chemistry lake sediments 010501 environmental sciences 01 natural sciences DDT Bottom water chemistry.chemical_compound environmental chemistry Environmental Restoration and Remediation passive sampling 0105 earth and related environmental sciences performance reference compounds Chemistry (all) Settore ICAR/03 - Ingegneria Sanitaria-Ambientale Public Health Environmental and Occupational Health Sampling (statistics) Sediment Membranes Artificial General Medicine General Chemistry Repeatability Polyethylene Pollution Low-density polyethylene Lakes Membrane chemistry Italy Surface water Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Chemosphere 200 (2018): 227–236. doi:10.1016/j.chemosphere.2018.02.077 info:cnr-pdr/source/autori:Borrelli R.; Tcaciuc A.P.; Verginelli I.; Baciocchi R.; Guzzella L.; Cesti P.; Zaninetta L.; Gschwend P.M./titolo:Performance of passive sampling with low-density polyethylene membranes for the estimation of freely dissolved DDx concentrations in lake environments/doi:10.1016%2Fj.chemosphere.2018.02.077/rivista:Chemosphere/anno:2018/pagina_da:227/pagina_a:236/intervallo_pagine:227–236/volume:200 |
| Popis: | Laboratory and field studies were used to evaluate the performance of low-density polyethylene (PE) passive samplers for assessing the freely dissolved concentrations of DDT and its degradates (DDD and DDE, together referred to as DDx) in an Italian lake environment. We tested commercially available 25 μm thick PE sheets as well as specially synthesized, 10 μm thick PE films which equilibrated with their surroundings more quickly. We measured PE-water partitioning coefficients (Kpew) of the 10 μm thick PE films, finding good correspondence with previously reported values for thicker PE. Use of the 10 μm PE for ex situ sampling of a lake sediment containing DDx in laboratory tumbling experiments showed repeatability of ±15% (= standard deviation/mean). Next, we deployed replicate 10 μm and 25 μm PE samplers (N = 4 for 10 d and for 30 d) in the water and sediment of a lake located in northern Italy; the results showed dissolved DDx concentrations in the picogram/L range in porewater and the bottom water. Values deduced from 10 μm thick PE films compared well (95% of all comparison pairs matched within a factor of 5) with those obtained using PE films of 25 μm thickness when dissolved DDx concentrations were estimated using performance reference compound (PRC) corrections, whether left at the bed-water interface for 10 or 30 days. These results demonstrated the potential of this sampling method to provide estimation of the truly dissolved DDx concentrations, and thereby the mobile and bio-available fractions in both surface waters and sediment beds. |
| Databáze: | OpenAIRE |
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