Determination of deployment specific chemical uptake rates for SDB-RPD Empore disk using a passive flow monitor (PFM)

O'Brien, Dominique, Bartkow, Michael and Mueller, Jochen F. (2011) Determination of deployment specific chemical uptake rates for SDB-RPD Empore disk using a passive flow monitor (PFM). Chemosphere, 83 9: 1290-1295.


Author O'Brien, Dominique
Bartkow, Michael
Mueller, Jochen F.
Title Determination of deployment specific chemical uptake rates for SDB-RPD Empore disk using a passive flow monitor (PFM)
Journal name Chemosphere  (ERA 2012 Listed)    (ERA 2010 Rank A)   Check publisher's open access policy
Publication date 2011-05
Sub-type Article
DOI 10.1016/j.chemosphere.2011.02.089
Volume number 83
Issue number 9
ISSN 0045-6535; 1879-1298
Start page 1290
End page 1295
Total pages 6
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Collection year 2012
Language eng
Formatted abstract The use of the adsorbent styrenedivinylbenzene-reverse phase sulfonated (SDB-RPD) Empore disk in a chemcatcher type passive sampler is routinely applied in Australia when monitoring herbicides in aquatic environments. One key challenge in the use of passive samplers is mitigating the potentially confounding effects of varying flow conditions on chemical uptake by the passive sampler. Performance reference compounds (PRCs) may be applied to correct sampling rates (Rs) for site specific changed in flow and temperature however evidence suggests the use of PRCs is unreliable when applied to adsorbent passive samplers. The use of the passive flow monitor (PFM) has been introduced for the assessment of site-specific changes in water flow. In the presented study we have demonstrated that the Rs at which both atrazine and prometryn are accumulated within the SDB-RPD-Empore disk is dependent on the flow conditions. Further, the calibration of the measured Rs for chemical uptake by the SDB-RPD-Empore disk to the mass lost from the PFM has shown that the PFM provides an accurate measure of Rs for flow velocities from 0 to 16cms-1. Notably, for flow rates >16cms-1, a non linear increase in the Rs of both herbicides was observed which indicates that the key resistance to uptake into the SDB-RPD Empore disk is associated with the diffusion through the overlying diffusion limiting membrane. Overall the greatest uncertainty remains at very low flow conditions, which are unlikely to often occur in surface waters. Validation of the PFM use has also been undertaken in a limited field study. 
Keyword Herbicide
Passive sampling
SDB-Empore
Chemcatcher
Semipermeable-Membrane Devices
In-Situ Calibration
Organic Contaminants
Sampling Techniques
Water
Pollutants
Chemcatcher
Samplers
Hydrocarbons
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article
Collections: Official 2012 Collection
National Research Centre for Environmental Toxicology Publications
 
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