Determination of kinetic and equilibrium regimes in the operation of polar organic chemical integrative samplers

Mazzella, Nicolás; Dubernet, Jean-François; Delmas, François

doi:10.1016/j.chroma.2007.03.087

Cited by 172 publications

(208 citation statements)

References 21 publications

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“…For the relatively hydrophobic compound, an increase in turbulence is accompanied by an increase in the elimination rate. A similar effect of hydrodynamics has been observed and explained also for POCIS [16].…”

Section: Effect Of Hydrodynamicssupporting

confidence: 62%

In Situ Measurement of Time-Weighted Average Concentrations of Cylindrospermopsin and Microcystin LR-YR-RR-LY in Natural Waters Using Silicone-Membrane/Γ-Fe2O3-Nanoparticle-Sorbent Passive Sampling Device

Mamba¹

2014

J Environ Anal Toxicol

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Section: Effect Of Hydrodynamicssupporting

confidence: 62%

In Situ Measurement of Time-Weighted Average Concentrations of Cylindrospermopsin and Microcystin LR-YR-RR-LY in Natural Waters Using Silicone-Membrane/Γ-Fe2O3-Nanoparticle-Sorbent Passive Sampling Device

Mamba¹

2014

J Environ Anal Toxicol

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“…But even in rivers, where there is a risk that samplers may be lost, passive samplers are still a tool that can be considered as being superior to repeated grab samples, in particular when one deals with fluctuating concentrations. Once the passive sampler technique has been further developed, and performance reference compounds can be included into the method to control for environmental parameters such as flow rate, [35,36] it will be a significantly superior tool to grab sampling.…”

Section: Discussionmentioning

confidence: 99%

Estrogens in Swiss Rivers and Effluents – Sampling Matters

Eggen¹,

Escher²,

Suter³

2008

Chimia

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Estrogenic activity of treated sewage effluents and receiving waters surfaced as an issue of general concern some 15 years ago. Since then, a large number of studies investigated the distribution and nature of the estrogenic substances in various aquatic ecosystems. Within NRP50, a five-year Swiss research programme on endocrine disruptors, four field studies were performed to characterize the presence of environmental estrogens in rivers and effluents. The estrogenic activity was quantified with a biological assay − the yeast estrogen screen. An overview of the sampling approaches and results of the various studies is presented here. In a first study, using grab sampling, it appeared that estrogenic activity in river water was highly variable. Average estrogenicity values did not correlate with sewage treatment works and/or river characteristics, e.g. effluent dilution factor. However, variability was not 'random' but clearly associated with river size, and possibly its discharge. A second study specifically addressed this issue of variability of estrogenicity. The study was conducted at a single effluent source and its receiving river. Variability of estrogenicity in the grab samples was again large but again not 'random'; some of the variability was explained by the time over which the effluent resided in the treatment process. In a third study it was explored if passive sampling would be a better way to assess average estrogenicity. Indeed, passive samplers identified sources of estrogens, and passive sampling data correlated well with both repeated grab sampling and bioaccumulation data. Subsequently, passive samplers were deployed across Switzerland in a fourth study. It involved 22 effluent discharges and the associated rivers. Data analysis of the last study is still ongoing, preliminary observations are discussed here. Although a lot could be learned from repeated grab sampling campaigns, it emerged that passive sampling is a very effective and appropriate technique to assess: i) effluent treatment efficiency, and ii) the chemical load of river water. For these reasons it is a valuable monitoring tool for water quality criteria assessments as well as for studies that aim to link exposure and effect. The passive samplers that are currently available not only target estrogenic substances, but many other polar organic compounds of concern, such as antibiotics (see NRP49), other pharmaceuticals and biocides.

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“…Ultrapure water (3 ℓ) was added to the beaker and analytes left to equilibrate for about 2 h resulting in a nominal concentration of 5 μg•ℓ -1 of each compound. Deployment of POCIS in the solution was preceded by initially soaking them in ultrapure water for about 12 h so as to reduce the possibility of sudden increase in flux across the membrane during the wetting stage at the beginning of the experiment (Mazzella et al, 2007). A single sampler was then suspended vertically in the solution for the exposure period at room temperature (25°C) and the beaker covered with aluminium foil in order to limit exposure to light and to minimise losses arising from volatilisation.…”

Section: Pocis Calibrationmentioning

confidence: 99%

Determination of naproxen, ibuprofen and triclosan in wastewater using the polar organic chemical integrative sampler (POCIS): A laboratory calibration and field application

Amdany¹,

Chimuka²,

Cukrowska³

2014

WSA

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In this study, the occurrence in wastewater of two non-steroidal anti-inflammatory drugs (NSAIDs), naproxen and ibuprofen, and one personal care product, triclosan, was assessed using the polar organic chemical integrative sampler (POCIS). The samplers were initially calibrated in the laboratory to obtain sampling rates (R s ) for each target compound followed by deployment in the influent and effluent of Goudkoppies and Northern Wastewater Treatment Plants ( in Goudkoppies and Northern WWTPs, respectively. Average concentrations of these compounds in the treated effluent ranged from 10.7 to 13.5 μg•ℓ -1 in Goudkoppies WWTP, and 20.4 to 24.6 μg•ℓ -1 in Northern WWTP. Analyte removal efficiencies varied between 68 and 86% in Goudkoppies WWTP and 61 and 82% in Northern WWTP. Grab samples processed by SPE method yielded higher analyte concentrations (up to three-fold) as compared to POCIS-derived estimates. This discrepancy was attributed to SPE's ability to extract both the free dissolved, and particle sorbed fractions of the contaminants.

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Determination of kinetic and equilibrium regimes in the operation of polar organic chemical integrative samplers

Cited by 172 publications

References 21 publications

In Situ Measurement of Time-Weighted Average Concentrations of Cylindrospermopsin and Microcystin LR-YR-RR-LY in Natural Waters Using Silicone-Membrane/Γ-Fe2O3-Nanoparticle-Sorbent Passive Sampling Device

In Situ Measurement of Time-Weighted Average Concentrations of Cylindrospermopsin and Microcystin LR-YR-RR-LY in Natural Waters Using Silicone-Membrane/Γ-Fe2O3-Nanoparticle-Sorbent Passive Sampling Device

Estrogens in Swiss Rivers and Effluents – Sampling Matters

Determination of naproxen, ibuprofen and triclosan in wastewater using the polar organic chemical integrative sampler (POCIS): A laboratory calibration and field application

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